Theoretical Investigation of Gasification of Solid Fuel in a Low-Temperature Gas Generator of an Aircraft.

The mathematical model and numerical method proposed in this study make it possible to study the regularities of gasification of solid porous fuel when hot gases are filtered through it and estimate the maximum operating time of the propulsion system. The features of gasification are studied for the case when polymethyl methacrylate is used as a solid fuel. It is shown that by changing the characteristics of the system and the process conditions, it is possible to change the flow rate of gaseous products from the gas generator, which will affect both the operating conditions of the cooling system for the materials of the combustion chamber structure and the value of the engine thrust. It is also shown that the operating time of a jet engine with a low-temperature gas generator increases with decreasing temperature and consumption of gaseous solid fuel combustion products, the interphase heat transfer coefficient, and the characteristic pore size of the fuel. [ABSTRACT FROM AUTHOR]