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依据某给定几何尺寸亚燃冲压发动机的结构和性能参数,通过简化冲压发动机数学模型,理论推导了发动机直连试验模拟参数与推力之间的关系。针对其典型试验状态和工作特性,采用小偏差分析法计算了不同模拟参数及其组合对发动机推力和空气流量的影响结果。在此基础上,重点分析了不同模拟参数对发动机调节、高度和速度特性的影响规律,说明了模拟方法的合理性。该分析方法对固体冲压和液体冲压发动机地面直连试验性能评估具有一定指导意义。
Based on the structural and performance parameters of a given submarine ramjet engine, the mathematical model of the ramjet engine was simplified and the relationship between the simulation parameters and the thrust force was derived theoretically. According to the typical experimental conditions and working characteristics, the effects of different simulation parameters and their combinations on engine thrust and air flow were calculated by using the small deviation analysis method. On this basis, the influence laws of different simulation parameters on engine regulation, height and speed characteristics are analyzed emphatically, and the rationality of the simulation method is illustrated. The analytical method is of guiding significance for the evaluation of the performance of the direct press test of liquid and solid ramjet engines.