Numerical Study Of Gas Flow For Vehicle Vertical Missile Launcher

As the air strike weapons technology becoming more and more advanced, the air combat becomes increasingly difficult. All countries in the world is facing a problem is that how to improve the anti air missile combat ability. Vehicular missile weapon system has good mobility and combat capability. Vertical launch technology has many advantages, such as, short reaction time, thermal transfer quickly, low cost and so on. Both of them can improve the anti air missile combat ability. the vehicle vertical missile has a good prospect of application and development, so it gets a lot of attention. For large vehicle mounted missile, gas from the nozzle jet with high temperature and high speed, it will build a strong thermal shock to the car. So it is very useful to res earch the method of gas platoon guide.This paper uses numerical simulation method to study the gas flow field distribution of the device of vehicular missile which used vertical launching. Firstly, we analyzed the structure of a supersonic jet flow field, and built the calculation model of burning gas exhaust system. Then, we analyzed the structure of diversion cone how to influence the structure of missile launcher. At last, we studied the impact of engine jet parameters on the surface flow distribution of the car body structures.According to numerical simulation result, the hazard generated by burning gas flow field can be effectively reduced through increasing the turning radius and impact height of guiding cone reasonably. With the increase of diversi on cone width, the thermal shock of gas to car ’s rear face and some other sections is intensified, decreasing thermal loads of part members like small wheels; And the increase of impact angle aggravates the damage of gas jet, which will increase the ablation of diversion cone with too large or small impact angle; The obtained simulation results has well confirmed the optimization on the exhaust gas effect generated by the optimized deflector structures.The numerical study of gas platoon guide can provide t he theoretical basis and technical support for the design and optimization of the missile launcher. It has the important significance and values for improving the launch precision of the vehicular missile, and enhance the capabilities of air defense weapon system.