星型装药固体火箭发动机工作过程仿真研究

Numerical Simulation of the Working Process in Star Grain Solid Rocket Motor

基于FLUENT软件的UDF二次开发模块,完成了星型装药燃面点火和燃面退移的建模,研究了星型装药固体火箭发动机点火和燃面退移过程,结果表明:星型装药固体火箭发动机工作时,装药头部与尾部存在一定的压强差;相比于星根区域,星角区域的点火过程进行的更加缓慢;采用商用FLUENT软件可以实现简单的星型装药燃面退移过程模拟。

Based on the UDF of FLUENT software,this paper establishes the model of ignition and dynamic burning process,and studies on the ignition and shift of burn surface of star grain solid rocket motor. The results show that when the motor is working,there is a pressure gradient between the head and tail of the grain. Comparing to the root of the star-shape of grain,the ignition process is slower in the slot.Using FLUENT software can carry out a simple simulation of the shift of burn surface in star-shape grain.