一种固体火箭发动机内弹道性能数字仿真研究

研究了固体火箭发动机内弹道性能数字仿真方法，包括确定其随机变量，提出根据试验数据修正压强和推力的计算公式和数字仿真模型。该方法可用于固体发动机方案选择、性能评定及流场计算。对某固体火箭发动机的内弹道性能进行了数字仿真，得出了燃烧时间平均压强和平均推力、最大压强、比冲和总冲等内弹道性能参数的均值和方差。计算结果和实验数据符合较好，说明该仿真模型计算可靠。

Research of digital simulation of internal ballistic performance of a solid rocket motor

The digital simulation method of internal ballistic properties of solid rocket motor is studied, including determining its random variables, modifying the theoretical formulation for correcting pressure and thrust based on the tested data and deriving the simulation mathematic model. The method can be used for the scheme selection, performance estimation and flow field computation of solid motor. On the basis of the digital simulation of internal ballistic properties for a solid rocket motor, the mean value and variance of internal ballistic properties are given, such as, average pressure and thrust, maximum pressure, specific impulse and total impulse. The results of simulation agree well with test data, showing that the digital simulation model of internal ballistic properties of solid rocket motor is reliable.