Method For Processing Experimental Data Research Articles

Kinetics of moisture exchange during convection drying of thin flat wet materials

The kinetics of convective drying of thin wet thermal insulation materials based on the relative drying rate and relative moisture contents has been studied. Processing of experimental data on drying of various wet materials has established that the relative drying rate is related to the relative moisture contents, which are the ratios of the current moisture content to its critical and initial values. Based on the functional dependence of the relative drying rate on the relative moisture contents using the processing of the experiment on drying of ceramics, felt, and asbestos, equations for calculating the drying time are obtained. The dependence of the relative drying rate on the ratio of the current moisture content to the critical one is given. Zonal methods for calculating the drying time are given, based on the drying rate curve. An expression for determining the drying coefficient is developed. Based on the analysis of experimental data on drying porous ceramics, sheet asbestos, and wool felt, graphs of the dependence of the relative drying rate on the ratio of the current moisture content to the initial one are constructed. Dependencies for determining the critical moisture content of the material are given. The considered method of processing experimental data allows obtaining all the main equations for calculating the kinetics of the drying process. A variant of estimating the drying time based on one experiment with a short time interval is given. A comparison of the calculated values according to the equations with the experiment is performed. The spread of the calculated values is in the range of experimental error. The formulas for calculating the drying time obtained without plotting the drying rate curve allow significantly reducing the time of processing the experimental data and can be applied to other materials.

Mathematical Modeling of the Heat Transfer Process in Spherical Objects with Flat, Cylindrical and Spherical Defects

This paper proposes a method for determining the optimal parameters for the thermal testing of plant tissues of fruits and vegetables containing surface and subsurface defects in the form of areas of plant tissues with different thermophysical characteristics. Based on well-known mathematical models for objects of predominantly flat, cylindrical and spherical shapes containing flat, spherical and cylindrical regions of defects, numerical solutions of three-dimensional, non-stationary temperature fields were found, making it possible to measure the power and time of the thermal exposure of the sample surface to the radiation from infrared lamps using the finite element method. This made it possible to ensure the reliable detection of a temperature contrast of up to 4 °C between the defect and defect-free regions of the test object using modern thermal imaging cameras. In this case, subsurface defects can be detected at a depth of up to 3 mm from the surface. To determine the parameters of mathematical models of temperature fields, such as thermal conductivity and a coefficient of the thermal diffusivity of plant tissues, a new method of a pulsed heat flux from a flat heater is proposed; this differs in the method of processing experimental data and makes it possible to determine the required characteristics with high accuracy during the active stage of the experiment in a period not exceeding 1–3 min.

Исследование инициирования волны фильтрационного горения газа открытым пламенем

One of the processes of filtration combustion, namely the process of filtration combustion of gas, is considered. Its importance and practical significance are emphasized. The current state of research is shown and the need to study the non-stationary processes of filtration combustion of gas is revealed. The article examines one of the non-stationary processes of filtration combustion of gas, which is of great importance: the process of formation of a wave of filtration combustion of gas, which occurs when a burning gas mixture moves through an inert porous medium towards the flow of a combustible mixture. This process occurs when devices using filtration combustion of gas are operating: devices for afterburning poor gas mixtures, radiation burners, etc. A comprehensive study of this process has been carried out, including mathematical modeling and experimental research. The necessity of using a comprehensive study is shown. A method for processing experimental data is proposed. The factors influencing the process of formation of the filtration combustion wave of gas when it is initiated by an open flame are established. The influence of the gas mixture feed rate, heat loss from the porous medium to the external environment, and the grain size of the porous medium on the ignition process and the movement of the filtration combustion wave of gas was revealed.

Bench studies of the influence of operating conditions on operational safety of steam turbine air-cooled condensers at subzero outdoor temperatures

Condensation processes are widely spread in various branches of industrial production and, in particular, in electric power industry, where, according to experts' data, heat removal in thermodynamic cycles of steam turbine plants (STP) operating as part of combined cycle plants (CCP) and autonomously, in the 21st century will be exercised mainly in air-cooled condensers (ACC). At the same time, the use of ACC as a part of steam turbine units operating in climatic conditions typical for the Russian Federation (RF) determines the relevance of problems to be solved to ensure their safe operation at subzero outside temperatures. One of these challenges is to ensure long-term safe operation of the ACC, with the formation of ice on the inner surface of the heat exchange pipes minimized. To conduct the research, Steam Turbine Air-Cooled Condenser research and training stand was used. The paper presents the combined circuit and measurement diagram of the research and training stand, and gives a brief description of the design of the ACC. Experimental modes have been determined, and methods for processing experimental data and analyzing the results obtained have been developed. As part of the study, experiments were carried out on 18 steady-state operation modes of the stand. At the same time, the values of the main operational parameters of the ACС varied within the following limits: the temperature of the cooling air at the ACС inlet — from minus 11,5°C to minus 1,8°C; the cooling ratio — from 176 to 790. The relative weight content of air in the vapor varied from 0,051% to 0,12%. An analysis of the obtained results was carried out, on the basis of which a relationship was established that allows, for various negative temperatures of the cooling air at the inlet to the ACС, to determine the highest value of the cooling ratio at which its long-term safe operation is possible. An algorithm for using the obtained relationship is given.

STATISTICAL ESTIMATES OF VARIABLES DETERMINING THE INTERVAL OF ELECTRIC POWER MONITORING

It is demonstrated that digital processing of information on electricity consumption is possible when transforming the studied process into a discrete form. The correct choice of the monitoring interval allows for the accurate reconstruction of the values of the studied function in the intervals between measurements. It is shown that when organizing the monitoring of average power, it is necessary to select a discretization interval that provides adequate representation of the current process. The proposed procedure for choosing the interval of electric power monitoring is based on determining the duration of the deviation of the random function of electric power change, subject to certain constraints. The justified number of monitoring studies is established to determine the optimal interval of electric power monitoring. It is shown that the most rational method of processing experimental data will be the method of joint estimation for correlation and standard deviation.

An Analytical Model for the Initial Stiffness of Bearing Connections with Slotted Holes

In steel structures, cover plate joints are mainly used with normal round holes, but slotted holes, where the slot is oriented perpendicular to the direction of the bearing force, make it possible to release displacements in selected directions and thus better control the complex state of stresses in the connected plates. This study investigates the initial stiffness of a cover plate with a single slotted hole. The aim of this paper is to propose an analytical model that predicts the initial stiffness of slotted holes with respect to experimental results obtained on a panel of different geometries. This approach makes it possible to evaluate the effects of the end distances on the bending of the plate compared to the bearing under the bolt. A large panel of geometries is tested to quantify the experimental value of initial stiffness using Digital Image Correlation (DIC) technique compared to Linear Variable Differential Transformer (LVDT) sensors. To evaluate the initial stiffness, a method of processing experimental data is developed that allows a reproducible determination of stiffnesses. An analytical model is then proposed based on the improvement of existing models available in the literature. It is validated for different specimen geometries considering the contribution to the initial stiffness due to bending, shearing and support of the steel plate under the bolt. The comparisons show that the proposed analytical model can predict the initial stiffness of different geometries of tested specimens with slotted holes.

Technology development and study of properties of craft marshmallows with raspberry puree

The development of recipes with natural raw materials enriched with bioactive substances is an urgent task for providing the population with a complete and balanced diet. The aim of the study is to develop recipes of craft marshmallows for therapeutic, prophylactic and health-improving purposes. The research was conducted by means of the expert method, sensory analysis, and statistical methods of processing experimental data. Standard and generally accepted methods were used to determine physical and chemical parameters. To achieve this goal, it is proposed to replace part of the apple puree in the recipe with raspberry because of the raspberries’ antibacterial and immunomodulatory properties. Models of marshmallow composition with different proportions of apple and raspberry puree, protein, sugar, glucose syrup and agar-agar were developed. The sensory analysis was carried out and the organoleptic characteristics of model marshmallow compositions (taste, odour, colour, consistency, structure, and surface condition) were determined. A sensory profilogram for model marshmallow compositions was created and the model composition with the best organoleptic characteristics was determined on the basis of the expert evaluation results. The content of pectin substances and L-ascorbic acid in the studied samples was determined. The physical and chemical parameters for the model marshmallow compositions were determined. It was found that due to the increase of raspberry puree content in the marshmallow recipe the moisture content of the marshmallow will increase from 21.3% ± 0.3% in MC1 with 30% raspberry puree content to 22.1% ± 0.3% in MC3 with 40% raspberry puree content. The density, active and titratable acidity of the marshmallow will decrease with the increase of raspberry puree amount in it. The expediency of using vitamin and pectin-containing raw materials (such as raspberry puree) for therapeutic, prophylactic and health-improving purposes in the marshmallow production technology has been experimentally proved. The marshmallow recipes with different proportions of apple and raspberry puree, possessing therapeutic, preventive and health-improving purposes and expanding the range of sugary confectionery products have been developed. The proposed marshmallows contain natural ingredients and are characterised by high organoleptic characteristics. Marshmallows on the developed recipes can be produced on confectionery production line of various capacities and in restaurant establishments

Badania wpływu pola magnetycznego na proces tworzenia kamienia w urządzeniach termicznych

Water is used as working fluids in hydro and thermal power engineering, as well as in heat supply and cooling systems. In the process of heating water in water-heating boilers, scale forms due to the precipitation of crystals of mineral additives and mineral salts. Over time, the accumulation of scale with low thermal conductivity leads to a decrease in the internal diameter of the pipes. Consequently, the flow of liquid is hindered, the hydraulic resistance increases and the thermal conductivity of the device decreases. The scale layer is usually removed by acid washing of the internal heat exchange surfaces or mechanical washing. However, both methods involve the use of a substantial amount of chemicals and result in highly polluted wastewater. In addition, it significantly increases operating costs. The article uses statistical methods for processing experimental data, and generally accepted methods for conducting experiments to study the patterns of scale formation using control and measuring instruments and accurate methods for measuring technological parameters. The main purpose of the paper is to study the influence of a constant magnetic field on the formation of mineral salts deposits on the surface of walls of thermal appliances used in chemical, oil refining, and food processing industry. The influence of a constant magnetic field on the formation of scale on the surface of the walls of the heating element in a water heater has been established. According to the results of an experiment aimed at preventing the accumulation of mineral salt deposits on the surface of the heating element in a water heating boiler under the influence of a magnetic field, the amount of mineral salt precipitate deposited on such surface can be reduced up to 5.2 times. Consequently, the prevention of mineral scale formation is achieved, eliminating the need to use expensive chemicals. The stable operation of the devices contributes to enhanced thermal efficiency. Under the influence of a magnetic field, scale formation decreases on average by a factor of 5, as long as the water temperature does not exceed 70°C. However, if the temperature rises above 90°C, the scale formation rate gradually increases.

Method for processing experimental data when investigating residual stresses by drilling probe holes and digital image correlation

This paper investigates the cutting forces arising when using a single abrasive grain. Analytical studies were carried out using a model of a single abrasive grain in the form of a rod with a radiused apex acting on the workpiece material. The slip-line method (method of characteristics) was used to calculate the deformation intensity of a plastically edged workpiece material under the action of a single grain. Mathematical models were developed for the following factors: plastic deformation of the material, edging of the stagnated zone and its friction against the grain surface when moved upwards in the form of chippings, grain friction against the plastically deformed material, and the action of the dynamic component of plastic deformation. The significance of the dynamic component in the overall balance of forces related to plastic deformation was established by determining the ratio of dynamic stress on the break line and shear yield point. This dependence calculated for D16T and 30HGSA materials showed the feasibility of accounting for the dynamic component subsequently processed by free orthogonal cutting and rolling contact deformation using a special machine with numerical control. Further, using the same machine, drilling of probing holes was performed with video recording of the surface image prior to and following drilling. By varying the speckle images, the displacements of material particles on the sample surface were determined by the digital image correlation method, following which the radial deformations were determined by differentiating the obtained displacement values. Statistical analysis of a sample of radial deformations equidistant from the centre of the hole while varying the rotation angle by Fourier transformation with the calculation of the distribution period showed that the distribution is periodic. It is established that the periodograms constructed using experimental data have local maxima at a period value close to 180 degrees. This determines that the main calculated components of the residual stresses and the angle of their rotation be constant when selected to calculate the values of radial deformations at arbitrary points around the hole. The paper presents an approach that allows residual stresses to be determined by drilling probing holes and assessing the displacement of material particles on the sample surface due to the redistribution of residual stresses. For the analytical description of experimental data, it is proposed that an approximating periodic function be used, and the physical meaning of its coefficients is determined.

Determination of the critical cyclic fracture toughness for the mode II in mixed fracture of structural steels

The developed method of processing experimental data from tests performed according to the four-point asymmetric bending scheme made it possible to establish the coefficient of proportionality between the modes of failure I and II, which for structural steels is in the range of 2,5÷3. The established longevity before the appearance of the critical speed according to the developed models is within the limits of the natural dispersion inherent in fatigue failure, which indicates the effectiveness of the developed algorithm and the correctness of the determined indicators of resistance to failure. The problem of the appearance of an oblique crack during tests on four-point asymmetric bending has been solved. It can be assumed that about 90% of the growth of an oblique crack is caused by the contribution of the mode of failure II.

Experimental research on muffle furnace dynamic properties

Purpose. To develop the method and software for building empirical models of muffle furnaces with two heating elements. Methodology. The method for processing experimental data according to the improved algorithm, which is based on the areas method, is used for constructing empirical models of the muffle furnace. Experimental research of the muffle furnace dynamic is conducted using the following methodology. The muffle furnace is cooled to the room temperature and then the lower heater is turned on and temperatures at the furnace output are fixed using the experimental two-channel temperature controller MIC-344. The second cycle of the experimental research began by cooling the furnace to the room temperature with turning on the upper heater. Observations based on the results of the experiment are conducted until the temperature is stabilized at the two outputs of the muffle furnace. Archiving of temperature trends is carried out using the RS485/Ethernet interface and the SmartReview software (a product of private limited company “Microl”). Findings. The developed software can be used for iteratively selection of the optimal empirical model based on the criterion of the root mean square deviation of the calculated and experimental data. The calculating method for the acceleration curve based on the transfer functions coefficients with a variable discreteness step is improved in order to compare the experimental data with the empirical modeling results. Twelve empirical models were tested for four signal transmission channels in the process of experimental research. It has been established that only four of them are stable (have left-hand roots of the characteristic equation). Among the selected sustainable models, the model with the numerator polynomial equaled to two and denominator polynomial equaled to three has been established as the best model (according to the established criterion). A structural diagram is created based on the synthesized empirical model of the muffle furnace, which includes four transfer functions and cross connections. Originality. For the first time, the empirical model of a muffle furnace with two electrical energy sources has been developed, which describes its dynamic properties as the object of automatic control with high accuracy, which enables to reveal the presence of internal cross-connections, that significantly complicate the controlling process of the object. Practical value. The created empirical models with two electric sources (tens) can be used for the synthesis of the high-precision automatic temperature control system of the muffle furnace.

Analytical methods for processing experimental data of magnetic materials

Analytical methods for processing experimental data of magnetic materials

Recording of X-ray laser plasma radiation with new coded aperture imaging system

The paper presents a method for obtaining images in the study of the spatial structure of X-ray radiation of laser plasma with a new type of coded masks. In these experiments, a special type of self-supporting structure was chosen for the coded aperture. The shadow image created by the radiation passing through the aperture was recorded with a fluorescent imaging plate. An iterative algorithm based on a probabilistic approach to solving ill-posed problems was used to reconstruct the source image. The stability of the solution of the iterative method for masks of the considered type is studied, the results of applying the method for processing experimental data are presented, and the obtained images are compared with the images recorded with a pinhole camera. It has been established that the coded aperture used makes it possible to increase the sensitivity of the recording system by 2–3 orders of magnitude, while its use in combination with the developed mathematical algorithm allows one to obtain a higher spatial resolution than with a pinhole camera.

Development of a kinetic model of magnetite leaching

The object of the research is the process of magnetite leaching with nitric acid solutions, and the subject of the research is the mathematical justification of the kinetic model and the calculation of kinetic parameters. The article considers the case of leaching in the kinetic region, while magnetite is considered as a polydispersity material of spherical shape. It is proposed to use the distribution function of the number of particles N by their radius r in the form N=a∙rb, where a and b are constants. This distribution was used to derive the equation for the rate of the process W, taking into account the change in the surface of the particles depending on the degree of leaching α: W=dα/dτ=K*∙(1–α)m∙((С0(γ–α)/γ))n, where K* is the rate constant; m and n are the order of solid material and nitric acid, respectively; C0 and γ are the initial concentration of nitric acid and its stoichiometric excess. The order m is defined as m=(b+2)/(b+3), at b→∞ the order m→1. When b=0, m=2/3 is the case of the equation for a shrinking sphere. An algorithm for calculating kinetic parameters in the Excel is proposed. Experimental dependences of the degree of transformation α on time τ are approximated by a third-order equation; by differentiating the obtained equation, the values of the velocity Wexp=dα/dτ at individual points are calculated. After the logarithm of the above equation, there is the expression (γ=1): ln(Wexp)=ln(K*)+m∙ln(1–α)+n∙ln(С0(1–α)). With the help of the «LINEST» function in Excel, for a temperature of 373 K, the values of the order of m=0.93 and n=1.29 and the rate constant K*=0.08 were obtained. Calculation of kinetic parameters for different temperatures takes into account the dependence of the rate constant on temperature: ln(Wexp)=lnk0–E/R∙1/T+m∙ln(1–α)+n∙ln(C0(1–α)). As a result of the calculations, the values n=0.83; m=1.2; E/R=–10402; lnk0=25.09 were obtained. The value of the multiplier k0=exp(lnk0)=7.88∙1010, the activation energy E=–8.31∙E/R=86440 J/mol, the total reaction order n+m=2.03 was calculated. The obtained kinetic parameters were used to determine the calculated values of the rate W. The average relative error between the experimental and calculated values of the leaching rates is 10 %. The proposed method of processing experimental data using a mathematical leaching model can be used for any leaching process.

РАЗРАБОТКА И ИССЛЕДОВАНИЕ СПОСОБОВ ПОВЫШЕНИЯ ЭЛЕКТРОЭНЕРГЕТИЧЕСКОЙ ЭФФЕКТИВНОСТИ СОЛНЕЧНЫХ ЭЛЕКТРОСТАНЦИЙ В УСЛОВИЯХ СЕВЕРА

The article is devoted to the issues of development and research results of ways to improve the electric power efficiency of solar power plants in the conditions of the North. Field studies of this work were carried out during 2020-2022 in the central part of Yakutia. In the course of the research, key photoelectric, electrical and technical and economic regularities, statistical methods for processing experimental data, including the method of calculating the student’s t-criterion, were applied. Algorithms have been developed for conducting field studies to idеntify the nature of the influence of climatic factors of the North on the functioning of solar power plants. The indicators of the influence of climatic factors of the North on the operation of solar power plants are obtained. А model for assessing the energy potential of solar power plants has been developed, taking into account the nature of the influence of climatic factors of the North, the reliability of calculations of which increases by 5.61% and approaches the actual indicators of electricity generation from existing solar power plants. As a result of the research, ways have been developed to reduce the negative impact of the climatic factors of the North on the functioning of solar power plants, allowing to increase their production by 15 ... 25%. Positive indicators of the effect of the introduction of the developed methods on the parameters of operational reliability, technical, economic and environmental indicators have been obtained. The results of the research can be applied when updating the guidelines for improving the electric power efficiency of mini- and microgrid facilities operating with the use of solar power plants in the conditions of the North.

Comparative analysis of experimental data clustering in MATLAB and Python environment

The paper compares normalization and clustering methods for processing experimental data in the MATLAB package and a Python program using the scikit-learn library. Recommendations on further application of Python programs and selection of normalization and clustering methods are provided. The choice of clustering methods for further research is discussed.

Общие принципы проведения экспериментальных исследований внутренних дефлаграционных взрывов

PURPOSE. Currently, during construction of facilities, the most comfortable conditions for their operation are created. The main principles that ensure comfort during operation of a construction facility are safety and reliability of building structures and the entire edifice. One of the conditions for the reliability of a building structure is its stability in relation to possible explosive loads or the explosion resistance of the object. This article substantiates the need to study deflagration explosion in relation to the design and construction of facilities where emergency explosions may occur. The study of this phenomenon is necessary for designing buildings and structures with explosion-proof features. METHODS. In studying emergency explosions, most important is an experimental study of the development of explosive combustion in a specific room equipped with pressure relief structures of certain parameters. This is due to the fact that a lot of parameters affect explosion loads, and for specific individual parameters of the pressure relief structures, explosion pressure may differ significantly. This feature is characteristic of most non-stationary processes, which include explosive phenomena. Experimental determination of characteristics and indicators of an emergency explosion is the most reliable tool in assessing the effectiveness of a specific pressure relief structure aimed at reducing explosive loads to a safe level. This article describes in detail the methodology for conducting experimental studies aimed at investigating this issue. FINDINGS. The experimental research methodology used by the author makes it possible to obtain all the necessary information about the parameters of explosive loads formed during internal emergency explosions. RESEARCH APPLICATION FIELD. As a result of experimental studies, the efficiency of specific pressure relief structures aimed at ensuring safe levels of explosive loads is determined. This allows for the design of buildings and structures to be explosion-proof. CONCLUSIONS. When designing and constructing facilities, it is often necessary to determine the parameters of possible loads formed during internal deflagration explosions. To determine them experimentally, the author has developed a methodology for conducting experimental studies aimed at studying internal deflagration explosions. The article provides a detailed description of stands and equipment for conducting such experiments. It thoroughly outlines the measuring system and method of processing experimental data, provides an example of processing the results of the experiment.

Experimental Determination Of Parameters Of Flow Structure Of Filtration Currents Through Layers Of Adsorbent Granules In Ecological Mass Exchange Equipment

A new method of processing experimental data and identifying parameters of flow structure by gas phase under conditions of filtration currents through layers of adsorbent granules in ecological mass exchange equipment is presented. Experimental data of gas phase velocity profiles and procedure of conducting experimental studies are presented. Basic design dependencies are given for determining parameters of flow structure by gas phase, based on treatment of experimental dependencies of non-uniformity of fields of flows of filtration currents through layers of adsorbents. An example is given of constructing C- and F-response curves that allow you to recognize models of flow structures by a continuous gas phase and increase the accuracy of mathematical modeling of mass exchange environmental systems.

Crop yield and energy assessment of chickpea and sunflower cultivation depending on microirrigation system designs

Over the past 15-20 years, agricultural production in Ukraine has been reoriented to the cultivation of more profitable, highly liquid, as well as drought-resistant crops, in particular – chickpeas and sunflowers. Simultaneously, the technology of growing these crops is quite energy-consuming, especially under irrigation conditions. Therefore, research on the impact of micro-irrigation system designs on the energy parameters of chickpea and sunflower cultivation is relevant. The purpose of the scientific work is to perform an energy assessment of chickpea and sunflower cultivation depending on the construction of micro-irrigation systems and the method of water supply. Research methods: short-term field experiments, and analytical and statistical methods for processing experimental data. The scheme of field experiments provided for various options for laying irrigation pipelines (IP) of micro-irrigation systems (in the horizontal and vertical planes) and the implementation of a pulsed water supply mode (standard). The control was the variant without irrigation. Based on the results of experimental studies, it was found that the method of laying irrigation pipelines (the design of micro-irrigation systems) reliably affects the yield of field crops. Thus, a higher yield was recorded with a shorter distances between the IP (0,7 and 1,0 m), regardless of the depth of the pipelines. It has been proven, that the higher yield level of both chickpeas (4,28 t/ha) and sunflower (4,50 t/ha) was obtained when implementing the pulse water supply mode, however, such an increase was within the error of the field experiment. At the same time, the introduction of subsoil drip irrigation is more appropriate than the cultivation of chickpeas and sunflowers in terms of the total energy costs of the technology. An analysis of energy efficiency in terms of the energy efficiency coefficient (EEC) indicates a high level of energy efficiency in chickpea and sunflower cultivation under both surface and subsurface drip irrigation (EEC = 2,03-2,23 and 2,32-2,50, respectively). The most effective was the cultivation of these crops with a pulsed water supply: EEC was 2,44 for growing of chickpeas and 2,61 for growing of sunflowers. The research materials are of practical value for farmers in the matter of energy management in chickpea and sunflower micro-irrigation technologies.

Measurement of Instantaneous Mass Flow Rate of Polypropylene Gasification Products in Airflow

A simple semi-empirical gas-dynamic approach for measuring the instantaneous mass flow rate of gasification products of low-melting solid material (polypropylene) in a flow-through gas generator with ambient-temperature air as gasifying agent is proposed. The approach is validated experimentally in the direct-connect facility allowing for the short-term (~0.5 s) heating of incoming air up to ~1700 K by hydrogen injection and ignition or by pyrotechnic charge activation. The application of the proposed method for processing experimental data for 9 (of over 100) selected typical test fires showed that the time-averaged total yield of polypropylene gasification products varied from 43 to 120 g/s, while the air-to-gasification product mass ratio was 2.3–2.9. The results of all conducted experiments confirm the applicability of the proposed approach for determining the mass flow rate of gasification products. The universality of the proposed approach is confirmed by applying two different schemes of gas generator: one with hydrogen ignition and another with pyro-charge ignition.