Combustion Gas Temperature Research Articles

Effects of CO2 gasification reaction on the combustion of pulverized coal char

Although numerous studies on CO2 gasification during coal char combustion have been documented, the effects of CO2 gasification on high-temperature carbon oxidation, which is important for evaluation of carbon conversion during pulverized coal combustion under oxy-fuel and flue gas recirculation conditions, are unclear. Thus, the char conversion characteristics at various contents of O2 and CO2 were studied in a drop-tube furnace at 1373 K. Due to the cumulative effects of CO2 gasification, which can not only suppress carbon conversion due to endothermicity but also consume part of carbon directly, there exists a minimal carbon conversion point around the CO2 content of 9–13 vol%, where the growth of promotion effect with CO2 content catches up with the suppression effect, and an inflection point around the CO2 content of 17–25 vol%, where the promotion effect of the direct gasification reaction on carbon consumption surpasses the suppression effect. Increasing O2 shifts both points towards high CO2 contents, whereas increasing combustion gas temperature decreases the values. A mathematical formula including oxidation, effect of gasification on oxidation, and CO2 gasification, is presented, which gives well prediction on high-temperature carbon conversion. With increasing CO2 content, the reduction degree of CO2 gasification on oxidation rate increases, and the synthesis oxidation rate slightly decreases, whereas there always exists a minimal point for gasification rate, gross carbon conversion rate, and gasification weightiness. With increasing O2 content, the oxidation rate, reduction degree of CO2 gasification on oxidation rate, and gross carbon conversion rate increase; the gasification rate increases below the minimal point, whereas decreases above the minimal point; the gasification weightiness decreases. Combustion gas temperature shows positive effect on all abovementioned parameters. The results derived here provide meaningful guidelines for practical application and kinetics research on pulverized coal combustion.

Analysis of emission reduction in ethyne–biodiesel-aspirated diesel engine

ABSTRACTThe present experimental work investigates the use of ethyne gas in biodiesel-fueled diesel engine at different flow rate of 1, 2, and 3 L/min and is compared with diesel operation. This work is aimed to examine the outcome of ethyne gas by dual-fuel operation on emission characteristics of neat biodiesel-fueled stationary diesel engine. The oil derived from mustard seeds are employed as a source for biodiesel. The work was carried out at 2100 rpm (speed) and at an optimal compression ratio of 17. Based on the outcome of this investigation, the maximum reduction in hydrocarbon (25.1%), carbon monoxide (17.24%), and smoke emission (24.8%) was observed for biodiesel–ethyne at 3 L/min than the neat biodiesel. However, NOx emissions were found to be 15.8% higher for ethyne–biodiesel fueling at 3 L/min owing to increase in combustion gas temperature than neat biodiesel.

ANALYSIS OF THE EFFECT OF PROPELLANT TEMPERATURE ON INTERIOR BALLISTICS PROBLEM

This study investigates the effect of conditioning temperature of double base propellants on the interior ballistic parameters such as burning gas temperature, barrel wall temperature, pressure and stresses generated in the barrel. Interior ballistic problem was solved employing experimental, numerical and analytical methods with a thermo-mechanical approach. Double base propellants were conditioned at different temperatures (52, 35, 21, 0, -20, -35, -54ºC). The maximum pressure in the barrel and projectile muzzle velocity were measured for all the propellants by conducting shooting tests with a special test barrel using 7.62x51 mm NATO ammunition. Vallier-Heydenreich method was employed to determine the transient pressure distribution along the barrel. The temperature of burnt gases was calculated by using Noble-Abel equation. The heat transfer analysis was done using the commercial software ANSYS to get the transient temperature and stress distributions. Temperature distribution through the barrel wall thickness was validated using a FLIR thermal imager. Radial, circumferential and axial stresses and corresponding equivalent Von Misses stresses were determined numerically and analytically.  The results of the analytical solution for stress analysis validated the finite element solution of interior ballistic problem. Increasing the initial temperature of the propellant resulted in higher temperature and pressure inside the barrel which in turn increased the stresses in the barrel.

An experimental study of emission characteristics from cylindrical furnace: Effects of using diesel-ethanol-biodiesel blends and air swirl

In this research, experimental investigation was undertaken to find the effects of air swirling on pollutant emissions in a cylindrical combustion chamber fuelled with diesel-biodiesel-ethanol blends. At the first, a burner system with various radial air swirl generator (the vane angles were 15°, 25°, 35°, 45°, 60° and 90°) attached to the combustion chamber of 400 mm inside diameter and 2000 mm length. Fuel blends were D100, D85B10E5 (85% diesel, 10% biodiesel and 5% Ethanol on a volume basis), D80B10E10, D75B20E5, and D70B25E5. CO, HC, CO2 and NOx as the emission characteristics were determined in this research. Moreover gas temperature in a cylindrical combustion chamber was reported. According to the results, the minimum CO and HC emissions belong to fuel blend D70B25E5 and air swirl generator with the vane angles of 15° and the maximum CO and HC emission occurs for net diesel (D100) and swirl air vane angle of 90°. Moreover, D80B10E10 has the maximum CO2 emission. It shows that ethanol can more effective to increase in CO2 values than that of biodiesel. Besides, the minimum CO2 emission obtained for fuel blend D100. The minimum value of NOx emission occurs for D100 and swirl air vane angle of 45°. In addition, air swirling condition with higher vane angles of 45° leads to higher premixed combustion and temperature and causes an increase in NOx emission. Moreover, the maximum value of NOx emission will be for D70B25E5 because of higher biodiesel content as an oxygenated fuel. The results indicated that the mean temperature of combustion gas increases when biodiesel content of fuel mixture increases. On the other hand, the mean temperature of combustion gas decreases by the addition of ethanol in fuel mixture.

Combined tunable diode laser absorption spectroscopy and monochromatic radiation thermometry in ammonium dinitramide-based thruster

Nonintrusive temperature measurements for a real ammonium dinitramide (ADN)-based thruster by using tunable diode laser absorption spectroscopy and monochromatic radiation thermometry are proposed. The ADN-based thruster represents a promising future space propulsion employing green, nontoxic propellant. Temperature measurements in the chamber enable quantitative thermal analysis for the thruster, providing access to evaluate thermal properties of the thruster and optimize thruster design. A laser-based sensor measures temperature of combustion gas in the chamber, while a monochromatic thermometry system based on thermal radiation is utilized to monitor inner wall temperature in the chamber. Additional temperature measurements of the outer wall temperature are conducted on the injector, catalyst bed, and combustion chamber of the thruster by using thermocouple, respectively. An experimental ADN thruster is redesigned with optimizing catalyst bed length of 14 mm and steady-state firing tests are conducted under various feed pressures over the range from 5 to 12 bar at a typical ignition temperature of 200°C. A threshold of feed pressure higher than 8 bar is required for the thruster’s normal operation and upstream movement of the heat release zone is revealed in the combustion chamber out of temperature evolution in the chamber.

Response optimization of four stroke variable compression ratio diesel engine cylinder head with stress analysis

The main aim of this work is to predict the design performance based on the stress/strain and behavior of cylinder head under various operating conditions. The effects of engine operating conditions such as combustion gas maximum internal pressure and temperature on the cylinder head have been analyzed. The maximum gas pressure vs crank angle are taken from the experimental set up of a variable compression ratio (VCR) Diesel engine . The analysis was carried out at three different compression ratios like 16.5,17.5,18.5 using a finite element analysis (FEA) software package, which is use to simulate and predict the Von-Mises stresses and strain pattern and thermal distribution of the cylinder head structure .The geometrical modelling was carried out using CATIA and analysis is done on ANSYS software. In this investigation, structural and thermal analysis of the cylinder head highlight several areas of interest. The maximum stress is found not exceeding the material strength of cylinder head, and thus the basic design criteria, namely no yielding and no structural failure under firing load case are satisfied. This steady-state finite element method (FEM) stress analysis can play a very effective role in the rapid prototyping of the cylinder head. The results of the thermo-mechanical analysis show that when the engine is running, the stress in the region is compressive, caused by thermal loading and combustion pressure. The fatigue analysis is carried out to know the factor of safety and life of the cylinder head it indicates maximum life of 1x106 cycles at all compression ratios are determined through finite element analysis. Further response optimization method is employed for the cylinder head by varying the thickness of the head in order to minimize the various stresses and deformation and temperature distribution values

Numerical Analysis of the Effects of Using Effervescent Atomization on Solution Precursor Thermal Spraying Process

The solution precursor thermal spraying (SPTS) process is used to obtain nano-sized dense coating layers. During the SPTS process, the in situ formation of nanoparticles is mainly dependent on combustion gas-temperature, gas-pressure, gas-velocity, torch design, fuel type, and Oxygen-Fuel (O/F) mixture ratios, precursor injection feeding ratio and flow rates, properties of fuel and precursor and its concentration, and the precursor droplets fragmentation. The focus of the present work is the numerical study of atomization of pure solvent droplets streams into fine droplets spray using an effervescent twin-fluid atomizer. For better droplet disintegration appropriate atomization techniques can be used for injecting the precursor in the CH-2000 high-velocity oxygen fuel (HVOF) torch. The CFD computations of the SPTS process are essentially required because the internal flow physics of HVOF process cannot be examined experimentally. In this research for the first time, an effervescent twin-fluid injection no...

Dependence of the Temperature of Effluent Gases of the Boilers on a Change in the Loading of Thermal Power Plants

One of the efficient methods of inexpensive modernization of thermal power plant is to reduce the temperature of effluent gases of the boilers (t exh ). The purpose of this paper was to carry out the experimental computation investigation of a degree of influence of the operation mode and performance factors (feed water flow rate and temperature, electric and thermal power) on the temperature of effluent gases of the boilers with the retention of the longevity of gas escape ducts. The attempts made to reduce the temperature of effluent gases in order to increase an efficiency factor of the boilers are restricted by the influence of (t exh ) on the longevity of heating surfaces both of the convective ducts and the entire gas-air duct (air heaters, gas-air mains, and the smoke pipe), taking into consideration the dew point (t d ) at which the combustion gas moisture condensation is possible. Based on the analysis of performance indices of the steam boilers of a ТGМP-314А type the regression equation was formed. The research data prove that the feed water temperature produces the greatest influence on the temperature of combustion gases in the entire range of variation in the electric load of the unit. The analysis of obtained data showed that the temperature of exhaust gases is increased with an increase in the electric power to 130 °С. This allows us to decrease the temperature of combustion gases on average by 20 °С taking into consideration the reliability of convective heating surfaces. Computations of the influence of t exh on q 2 showed that with the 1°С drop in the temperature of combustion gases an increase in the efficiency factor of the boiler reaches 0,035 % for the natural gas burning and 0,06 % for the fuel oil burning. Thus, we can come to a conclusion that the efficiency factor of the boiler of a ТGМP-314А type can be increased by 0,7 % with no degradation of the reliability of the heating surfaces of convective duct for the natural gas burning. The specific consumption of standard fuel will be reduced by 1,61 g.s.f. (grams of the standard fuel)/(kw∙h).

Review of Hazard Test of Combustion Gas and Exhaust Temperature of Acrylic Fire Protection Paint

Review of Hazard Test of Combustion Gas and Exhaust Temperature of Acrylic Fire Protection Paint

Measurement and modeling of the generation and the transport of entropy waves in a model gas turbine combustor

Indirect combustion noise is caused by entropy spots that are accelerated at the first turbine stage. These so-called entropy waves originate from the equivalence ratio fluctuations in the air–fuel mixture upstream of the flame. As entropy waves propagate convectively through the combustion chamber, they are subject to diffusion and dispersion. Because of the inherent difficulty of accurately measuring the burned gas temperature with sufficient temporal resolution, experimental data of entropy waves are scarce. In this work, the transfer function between equivalence ratio fluctuations and entropy fluctuations is modeled by a linearized reactor model, and the transport of entropy waves is investigated based on a convection-diffusion model. Temperature fluctuations are measured by means of a novel measurement technique at different axial positions downstream of the premixed flame, which is forced by periodic fuel injection. Experiments with various flow velocities and excitation frequencies enable model validation over a wide range of parameters.

Comparison of airflow, coal combustion, NOx emissions, and slagging characteristics among three large-scale MBEL down-fired boilers manufactured at different times

Boilers manufactured by using the down-fired technology of British Mitsui Babcock Energy Limited Corp. (called as MBEL down-fired boiler) account for an about 20% Chinese down-fired boiler’s market share. The published work showed that MBEL down-fired boilers suffered similarly from problems of asymmetric combustion and high NOx emissions, while combustion status and burnout rate varied greatly among boilers manufactured at different times. To uncover the airflow, coal combustion, NOx emissions, and slagging characteristics with respect to various boiler’s parameters (including furnace configuration, burner layout pattern, and air-distribution model), cold-modeling airflow experiments and full-load industrial-size experiments under design parameters were performed for three typical MBEL down-fired boilers (with a boiler capacity of 350, 300, and 600MWe, respectively). All boilers present flow-field deflection, with the downward airflow in one side penetrating much deeper than that in the other side. Consequently, asymmetric combustion appears in real operations, with large gas temperature gaps existing between the front- and rear-half furnace sides. The 350MWe boiler, which has a leptosome furnace pattern and owns the highest secondary-air velocity and volumetric heat capacity, shows the weakest flow-field deflection and highest furnace gas temperature levels corresponding to the lowest burnout loss, but unfortunately, suffers from particularly high NOx emissions and serious furnace-arch slagging. On the contrary, the 300MWe boiler generates the lowest gas temperature levels and NOx emissions and highest burnout loss, without such a slagging problem that appearing in the 350MWe boiler. Although the 600MWe boiler also presents a poor furnace performance, its combustion status, gas temperatures, and burnout rate are all a little better than those of the 300MWe boiler, with the exception of higher NOx emissions and the deduced furnace-arch slagging problem. Finally, the three boilers’ performance comparison generates an appropriate parameter assemble recommended for new MBEL down-fired boiler designs.

Flame–wall interactions of lean premixed flames under elevated, rising pressure conditions

Direct numerical simulation (DNS) of laminar lean methane–air and n-heptane–air premixed flames with high exhaust gas recirculation (EGR) ratios propagating towards inert walls in a head-on quenching configuration is conducted to investigate flame–wall interactions at relatively high initial pressure conditions. This study considers the flame propagation under isochoric process after ignition while the piston is at top dead center (TDC). The effects of EGR ratio, equivalence ratio, initial pressure and wall temperature on heat loss and quenching distance are investigated. The results showed that change of EGR ratio in fuel mixture significantly affects the maximum wall heat flux and the heat flux induced by the burned gas temperature. The normalized flame–wall interaction time is not influenced over a range of EGR ratios, equivalence ratios and initial chamber pressures for methane–air and n-heptane–air flames at fixed wall temperature conditions. The dimensional flame–wall interaction time is almost constant when the chamber pressure is doubled. The influence of low temperature oxidation in n-heptane flames on wall heat flux induced by temperature differences between the preheated fuel mixture and the wall is found to be insignificant. Moreover, both thermal conductivity near the wall and quenching distance are sensitive to the wall temperature, and have a substantial influence on the wall heat flux.

Experimental Evaluation of Combustion Parameters with Ion-Current Sensor Integrated to Fast Response Thermocouple in SI Engine

AbstractThis study aims to examine the combustion process in a spark-ignition (SI) engine, and the correlation between the in-cylinder pressure, local gas temperature, and ion current under different operating conditions (i.e., spark timing, engine speed, equivalence ratio, throttle position). A commercial fast thermocouple was modified in order to measure both the local gas temperature and the ion current, and placed inside the combustion chamber. The fast thermocouple was charged on its stainless steel sheath isolated from the combustion chamber by an external 64-V direct current (DC) source. All three stages of the ion current as well as the local gas temperature were successfully measured in the experiment using an ion-current sensor integrated to the fast thermocouple. A significant positive relation between periods of combustion, ion-current signals, and local gas temperature was observed. A new correlation between local gas temperature and ion-current signals was obtained with an ion-current sensor...

Reaction-space analysis of homogeneous charge compression ignition combustion with varying levels of fuel stratification under positive and negative valve overlap conditions

Full-cycle computational fluid dynamics simulations with gasoline chemical kinetics were performed to determine the impact of breathing and fuel injection strategies on thermal and compositional stratification, combustion and emissions during homogeneous charge compression ignition combustion. The simulations examined positive valve overlap and negative valve overlap strategies, along with fueling by port fuel injection and direct injection. The resulting charge mass distributions were analyzed prior to ignition using ignition delay as a reactivity metric. The reactivity stratification arising from differences in the distributions of fuel–oxygen equivalence ratio ([Formula: see text]), oxygen molar fraction ([Formula: see text]) and temperature ( T) was determined for three parametric studies. In the first study, the reactivity stratification and burn duration for positive valve overlap valve events with port fuel injection and early direct injection were nearly identical and were dominated by wall-driven thermal stratification. nitrogen oxide (NO) and carbon monoxide (CO) emissions were negligible for both injection strategies. In the second study, which examined negative valve overlap valve events with direct injection and port fuel injection, reactivity stratification increased for direct injection as the [Formula: see text] and T distributions associated with direct fuel injection into the hot residual gas were positively correlated; however, the latent heat absorbed from the hot residual gas by the evaporating direct injection fuel jet reduced the overall thermal and reactivity stratification. These stratification effects were offsetting, resulting in similar reactivity stratification and burn durations for the two injection strategies. The higher local burned gas temperatures with direct injection resulted in an order of magnitude increase in NO, while incomplete combustion of locally over-lean regions led to a sevenfold increase in CO emissions compared to port fuel injection. The final study evaluated positive valve overlap and negative valve overlap valve events with direct injection. Relative to positive valve overlap, the negative valve overlap condition had a wider reactivity stratification, a longer burn duration and higher NO and CO emissions associated with reduced fuel–air mixing.

Experimental investigation on CI engine performance using steam injection and ferric chloride as catalyst

The present investigation pertains to running a diesel engine with diesel as the main fuel and diesel-ferric chloride (FeCl3), diesel-steam injection, and diesel-FeCl3-steam injection combinations. In order to conduct the experiment, engine exhaust energy and saturated steam generated from shell and tube heat exchanger were used. A heat exchanger was designed to maintain 3% and 5% of steam flow rate respectively at 60% and 80% engine load. The results showed that in diesel-ferric chloride (FeCl3), diesel-steam injection, and diesel-FeCl3-steam injection combinations, the brake thermal efficiency increases by 8%, 4%, and 3% respectively as compared to diesel mode. In diesel-FeCl3-steam injection combination, maximum combustion gas temperature and maximum cylinder pressure decreased up to 4% when compared to diesel mode. Emissions such as NO, CO2, O2, and HC were reduced when the engine was run with diesel-FeCl3-steam injection combinations as compared to diesel mode and the diesel-ferric chloride combination resulted in decreased emission of CO, HC and smoke when compared to diesel mode.

Two-dimensional OH-thermometry in reacting flows using photofragmentation laser-induced florescence

In the present work, the possibility of using photofragmentation laser-induced fluorescence (PFLIF) for thermometry in different reacting flows is investigated. Hydroxyl (OH) fragments are created by UV-laser (266nm) fragmentation of hydrogen peroxides (H2O2 and HO2), whereupon the fluorescence, induced while scanning the wavelength of a second laser across the A2Σ+(v = 1)–X2Π(v = 0) absorption band (around 282nm) of the generated OH fragments, is collected and detected. The temperature is determined by fitting simulated OH-excitation spectra of different temperatures to the experimentally recorded spectrum. In combustion, hydrogen peroxides are intermediate species formed during the low-temperature oxidation of the fuel, and hence they are present in a region covering a wide temperature span, ranging from unburnt to burnt gas temperatures. Thus, LIF of OH photofragments stemming from hydrogen peroxides allows for thermometry covering a wider temperature range than LIF of naturally present OH radicals. There is another important advantage of the concept in that the temperature sensitivity of OH excitation spectra is greater at lower temperatures. The method is demonstrated for two-dimensional (2-D) thermometry in three different measurement situations, namely a free flow of vaporized H2O2 at room temperature, a preheated mixture of CH4/N2/O2/O3 at intermediate temperatures (300–600K), where the OH fragments stem from photodissociation of O3 followed by chemical reactions, and in an optical homogeneous charge compression ignition (HCCI) engine prior to ignition, i.e. at elevated pressures and temperatures. It is found that the technique performs well in all three cases, with measured temperatures in good agreement with thermocouple readings, for the two first cases, and with temperatures calculated based on the ideal gas law using measured pressure traces as input for the engine measurements. The quantitative 2-D temperature images acquired in the engine experiments reveal inhomogeneous temperature distributions, clearly illustrating the capacity of the technique to yield crucial experimental input to engine modelers and designers. The accuracy of the technique in the temperature range 300–600K is lower than 23K. For the room temperature case the precision is 4.3%, corresponding to 12K.

Variations in heat release rates and NOX formation of indirect injection (IDI) diesel engine fueled with fatty acid methyl esters (FAME)

ABSTRACTDue to concerns over fossil fuel shortages as well as the greenhouse effect of engine exhaust, biodiesel use in the transportation sector is being promoted. Biodiesel and fossil diesel have distinct physical and chemical properties. These deviations in fuel properties can result in different combustion characteristics and engine exhaust emissions. It has been reported that the emissions of CO, HC, and PM are reduced with biodiesel blends, but NOX emissions are increased and the increment is roughly proportional to the amount of biodiesel mixed in the fuel blend. Comparing the heat release rates of D100, B5, and B20 we found that the heat release rate increases as more biodiesel is mixed in the fuel blend. Ignition delay was shortened. The maximum pressure increase rate and the maximum heat release rate also increased for B20. A two-zone combustion model was developed to estimate the burned gas temperature. The extended Zeldovich mechanism was then used to calculate the NO formation in the burned zone. It was found that the calculated NO concentration for B20 is 15% higher than that of D100. The calculated NO formation corresponds to the uncertainty in heat loss. It is evident that the uncertainty in the heat transfer model would have a significant effect on the NO calculation. The trend of variation in NO formation is consistent for both the measured data and the calculated results no matter what heat transfer model was used.

Experimental and numerical analysis of non-catalytic partial oxidation and steam reforming of CH4/O2/N2/H2O mixtures including the impact of radiative heat losses

Partial oxidation and non-catalytic steam reforming of methane is studied by conducting an experimental and numerical analysis of reactions taking place in the post-flame region of a generic laminar atmospheric burner operated at fuel-rich conditions. Laminar planar premixed methane/oxygen/nitrogen (CH4/O2/N2) flames are stabilized above a porous material with an equivalence ratio ϕ = 1.8. The oxygen enrichment Ω in the O2/N2 mixture varies from 0.32 to 0.45. Mixtures are also diluted with superheated steam. The water vapor mole fraction XH2Ou in the unburnt mixtures ranges from 0.11 to 0.28. The temperature of burnt gases is measured along the central axis of the burner with a thermocouple. Gas chromatography measurements along the same axis indicate the production of hydrogen (H2) and carbon monoxide (CO) just downstream the flame front. Measurements also reveal a decrease of the CO concentration as the distance to the flame front increases due to a drop of the temperature in the burnt gases. One-dimensional direct simulations of flames using detailed chemistry mechanisms are conducted under non-adiabatic conditions accounting for conductive heat losses to the burner surface and radiative heat transfer of semi-transparent gases using a statistical narrow-band model for the radiative properties of the main species (H2O, CO2, CO,…). Predicted temperature profiles and major species mole fractions yield satisfactory match with measurements only if radiative heat losses are taken into account in the simulations. It is shown that self-absorption of thermal radiation from H2O and to a lesser extend from CO2 fully controls the temperature profile in the post-flame region. The endothermic steam methane reforming reaction taking place in this region is strongly penalized by radiative heat loss. It is shown that increasing the steam dilution promotes the H2/CO ratio within the burnt gases, while rising the oxygen enrichment benefits to the CO production to the detriment of H2. This analysis reveals the important role of radiative heat transfer and self-absorption of steam and to a lesser extent carbon dioxide in the syngas formation such as for example the methane auto-thermal reforming process.

Experimental investigation of atomization and combustion characteristics of high-pressure pulse sprays

This study investigated the effect of fuel injection pressure (20–80MPa) on atomization and combustion characteristics using a stationary combustor with an intermittent supply of liquid fuel. In the atomization experiments, spray tip penetration and spray width increased, and the Sauter mean diameter of droplets decreased with an increase in the fuel injection pressure. In the combustion experiments, the OH emission intensity and combustion gas temperature upstream of the furnace increased with the fuel injection pressure, whereas nitrogen oxides emissions were reduced. The results demonstrate that high-pressure pulse spray combustion can reduce NOX emissions and enhance the combustion load by an increase in the fuel injection pressure.

Thermo-mechanically coupled thermal and stress analysis of interior ballistics problem

This study covers the interior ballistic solution of a 7.62 mm gun barrel based on shooting tests conducted using a test barrel and G3 rifle. The 3-D transient heat transfer and stress (thermal/mechanical) analysis were done using a thermo-mechanically coupled theory. The maximum pressure and muzzle velocity data of the test barrel were obtained via piezo-electric sensors and light screens, respectively. Using these data, Vallier–Heydenreich method was employed to determine the pressure, projectile velocity and position along the barrel. Pressure information was used with Noble–Abel equation to determine the temperature of burnt gases along the barrel. The convection heat transfer coefficient was determined using Vielle's burning equation. The commercial software program ANSYS was employed to get the temperature distribution in radial and axial directions of the barrel. The radial temperature distribution through the barrel wall thickness was validated by the temperature readings taken at the outer barrel surface using a FLIR thermal imager as a new and high precision method compared to the most generally used measuring methods with thermocouples. Pressure and temperature data along the barrel were employed in stress analysis to get the radial, circumferential and axial stresses. The results of the finite element (ANSYS) and analytical solutions were closely conforming to each other.