Abstract
Purpose. This work involves the development of a numerical model for the calculation of areas of thermal damage to people in the event of solid propellant burning at the industrial site. Methodology. An equation expressing the law of energy conservation was used to solve the problem of determining the areas of thermal shock of people at the industrial site. A potential flow model was used to calculate the airflow velocity field in the presence of buildings at the industrial site where an emergency occurs. The numerical solution of the two-dimensional equation for the velocity potential is derived using the Liebmann method. This numerical model takes into account the uneven velocity field of the wind flow that is formed near industrial buildings. An implicit difference splitting scheme was used to numerically solve the energy equation. The physical splitting of a two-dimensional energy equation into a system of one-dimensional equations describing the temperature transfer in one coordinate direction has been carried out previously. At each splitting step, the unknown temperature value is determined by an explicit point-to-point computation scheme. Based on the numerical model built, the code using the FORTRAN algorithm language is created. Findings. Based on the developed numerical model, a computational experiment was conducted to evaluate the risk of thermal damage to people at the industrial site where solid propellants are produced. The dangerous areas for personnel are identified. Originality. An efficient numerical model has been developed to calculate the zones of thermal pollution in case of solid propellant burning. Practical value. Based on the developed mathematical model, a computer program was created, which allows performing serial calculations for determining the zones of thermal damage during emergencies at the chemically hazardous objects. The mathematical model developed can be used to design an emergency response plan for chemically hazardous objects.
Highlights
Different types of emergencies are possible at chemically hazardous sites, where the emission of chemically hazardous substances takes place [2, 5,6,7], and their accidental ignition
Our study examines the methodology for solving the problem associated with identifying the potential territorial risk of thermal damage to personnel while burning solid propellant at an industrial site
The constructed numerical model was used to estimate the potential risk of thermal damage to people at the industrial site of Pavlohrad Chemical Plant (Fig. 2) in the case of solid propellant of the Grim-2 rocket
Summary
Different types of emergencies are possible at chemically hazardous sites, where the emission of chemically hazardous substances takes place [2, 5,6,7], and their accidental ignition. Our primary goal is to develop a computer model for rapid assessment of the risk of thermal damage to people at an industrial site in the event of emergency combustion of solid propellants. Apart from the concentration of chemically hazardous substances, another affecting factor emerges – the air temperature near the accident scene. To adequately assess the risk of human damage at industrial sites, the impact of this hazardous factor on people should be taken into account. To solve this problem, it is necessary to predict the air temperature change over time in the work area, since this task belongs to the class of non-
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