中国空间科学技术

中国空间科学技术

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内部干扰因素对液体火箭发动机性能影响的仿真

沈赤兵,吴建军,王克昌,陈启智   

  1. 国防科技大学
  • 发布日期:1999-02-25

Stochastic Simulation of the Effects of the Internal Interfering Factors on the Liquid Rocket Engine Performance

Shen Chibing Wu Jianjun Wang Kechang Chen Qizhi (National University of Defense Technology,Changsha 410073)   

  • Online:1999-02-25

被引次数

5

摘要： 以某泵压式液体火箭发动机为研究对象，以内部干扰因素的实际变化范围为基础，引用随机数的产生方法和概率密度函数估计的方法以及Ｐｅａｒｓｏｎｘ２检验法，在每个内部干扰因素服从正态分布、韦布尔分布、均匀分布的不同情况下，利用液体火箭发动机静特性非线性数学模型进行了内部干扰因素对液体火箭发动机性能影响的随机仿真，计算得出了发动机性能参数的统计分布规律。

关键词: 液体推进剂火箭发动机, 概率密度函数, 静态特性, 数学模型, 仿真

Abstract: A pump fed Liquid Rocket Engine (LRE) is researched.Based on the actual variation range of the internal interfering factors,the method of drawing random sample,the estimate method of the probability density parameters and the method of Pearson's chi square test are employed.On the various conditions that each internal interfering factor obeys the normal distribution,Weibull distribution and uniform distribution respectively,a nonlinear mathematical model of static characteristics of LRE is employed to simulate stochastically the effects of the internal interfering factors on the engine performance,and to obtain the statistical distribution laws of the engine performance parameters.