Performance Analysis Of Gas-Generating Propulsion System In The Ignition And Cooling Process

This paper aims to study Gas-Generating Propulsion System. The research is mainly focused on the structure of its cooling system and ignition device by building mathematical model and simulation model. And the ground experimental system was built to test the performance of the cooling instrument. The content of the study can be summarized as below.1. The finned radiation cooler was designed and explored. Spiral channels were used to make the heat convection between working medium and cooler pipe wall to be full. Meantime, the fin was used for strengthening radiation heat transfer between cooler shell and external. A mathematical model was established to imitate the process and fluid simulation software was used for the numerical simulation of the model. Then the best design parameters were obtained through the simulation results analysis.2. Three finned radiation coolers were studied in the ground laboratory. According to the requirements from application fields, three different finned radiation coolers were designed and manufactured. And the cooling performances of three manufactures were tested in ground laboratory.3. The ignition process of gas generating unit was studied. After exploring the design method for gas generating reagents formula by using thermodynamic calculation, we succeeded in the structure design of the gas generating unit. And we studied the ignite methods and got the best one.4. The principle of the simulation software was introduced and three explosion simulation method including shared node, contact coupling and fluid-solid coupling were analyzed. We gained good results in the simulation process by using the multi-material fluid-solid coupling methods as the major method and other method for supplement.5. The simulation model of gas generating agent was built and its working process was analyzed by using proper material model, state equation and simulation parameters. The process of fuel gas expand, the process of diaphragm cutting separation cut by fuel gas and the shape of crevasse in diaphragm were all observed directly during the analysis.