| According to the development of a late-model supercavitating torpedo, the thesis does theoretical calculation and simulation of metal-water reactor ramjet engine. It is mainly about:The thesis establishes the mathematical model of the heating calculation of the ramjet engine, and puts forward considering powdered material fuel as torpedo's propellant for the first time.The thesis makes two general purpose programs, programs for Heating calculation and ingredient optimization, by adopting measures of chemical equilibrium constant and free energy minimum.The thesis does simulation of the inner flow field of the combustion chamber of the engine.The program of heating calculation could calculate the thermal parameters of the combustion chamber and the nozzle exit convenience, and the programs of ingredient optimization could optimize the ingredient of propellant, according to the different object function. Nozzle velocity and characteristic velocity are selected as object function, the thesis does the optimization of the ingredient of propellant. At the same time, base on optimal result of Nozzle velocity, the thesis researches the relationship of specific impulse, proportion between water and propellant, re-inflow, combustion temperature.The thesis establishes the mathematical model of the working process of the ramjet engine which make metal-water reactor as its propellant. And by using software called Fluent, adopting non-premix combustion model and algorithm called SIMPLE, simulates the two-dimension flow field of the combustion chamber. The result indicates: under difference working conditions the inner flow fields of combustion chamber are reasonable, combustion chamber performance well, combustion efficiency near to the theoretical result. According to the efficiency of the inner flow field, could help confirm the position of water inlet, and the calculation result could provide a theoretical principle for the optimization of the structure of the combustion chamber. |
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