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某型膨胀循环发动机在研制初期基于环境压力可能对膨胀循环发动机起动加速性有较大影响的考虑,采用了全程主动引射高空模拟试验方案,试验结果显示环境压力对发动机起动加速性的影响较小。发动机室压和喷管面积比是影响引射方式的主要参数,该型膨胀循环发动机与采用被动引射的某型燃气发生器循环发动机参数相当,这为该型膨胀循环发动机采用被动引射提供了可能,并对膨胀循环发动机采用被动引射高空模拟试验方案的可行性进行仿真研究。
Based on the fact that the environmental pressure may have a significant influence on the starting acceleration of the expansion cycle engine in the initial stage of development, a certain type of expansion cycle engine is adopted. The full-scale active launch simulation test program is adopted. The experimental results show that the influence of ambient pressure on the engine starting acceleration small. Engine chamber pressure and nozzle area ratio are the main parameters that affect the injection method. This type of expansion cycle engine is equivalent to the cycle engine parameters of a certain type of gas generator adopting passive injection, which is provided by passive injection for this type of expansion cycle engine It is possible to simulate the feasibility of using the experimental program of passive launch in the expansion cycle engine.