Development of the dynamic simulator for the hypersonic turbojet engine including unsteady phenomena

建立了高超声速预冷涡喷发动机的动态模拟器，包括进气道不起动现象的非定常模型和两相氢流流动特性。风洞试验和数值模拟表明，进气道嗡鸣的幅值和频率取决于进气道的进出流平衡和进气道后的管道容积。研制了一种新型的电容式空泡率测量仪，研究了氮气质量与传热速率之间的关系。发动机的动态仿真结果与试验结果基本一致。

We developed a dynamic simulator for the hypersonic precooled turbojet including the unsteady models of the inlet unstart phenomenon and flow properties of two-phase hydrogen flow. Wind tunnel tests and numerical simulation clarify that the amplitude and frequency of the inlet buzz are determined by the inflow and outflow balance of the inlet and the duct volume located after the inlet. A capacitance-type void fraction meter was newly developed and relationship between the quality and heat transfer rate of the nitrogen was researched. The dynamic simulation agrees with the engine firing test.