某高低压榴弹发射器两相流内弹道数值模拟

Numerical Simulation of Two-Phase Flow Interior Ballistics of High-Low Pressure Grenade Launcher

为了研究某高低压榴弹发射器的内弹道规律,根据高低压发射原理和气固两相流的相关理论,建立了近似枪膛装置中高低压室的两相流内弹道方程组,采用MacCormack差分格式进行了数值计算。计算结果与实验结果对比分析,模型和算法是可行的。通过调整某一参数,应用所得算法程序,可以实现某榴弹发射器改变内弹道性能的要求,或者预测预研榴弹武器的性能。

In order to study the law of the interior ballistics of a high-low pressure grenade launcher,this paper establishes the interior ballistics equations based on the two-phase flow theory and obtains the numerical simulation results with MacCormack difference scheme according to the high-low pressure emission principle and the gas-solid flow theory.The simulation results are compared with the experimental results,it demonstrate that the model and algorithm is reliable.By adjusting one of the parameters of this program,the requirements of changing the interior ballistic performance of a grenade launcher can be achieved and even the performances of pre-research weapons can be forecasted.