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以MHD-Arc-Scramjet联合循环发动机为对象开展性能分析,探讨了能量旁路系统对发动机性能的影响,给出了MHD-Arc-Scramjet联合循环发动机相对于传统冲压发动机的单位推力差异。结果表明:电子束电离消耗的能量,能量旁路比例,电弧注入过程的最高温度以及进气道的压缩程度是能量旁路系统中影响发动机单位推力的主要因素;在这些参数的取值范围内合理取值,并兼顾材料和技术实现等约束,性能分析表明:在来流速度2 800~4 000 m/s范围内MHD-Arc-Scramjet联合循环发动机相对传统冲压发动机具有明显的单位推力优势。
The performance analysis of MHD-Arc-Scramjet combined cycle engine was carried out. The influence of energy bypass system on engine performance was discussed. The difference of unit thrust of MHD-Arc-Scramjet combined cycle engine was compared with that of traditional ramjet engine. The results show that the energy consumed by electron beam ionization, the ratio of energy bypass, the maximum temperature of arc injection and the degree of compression of inlet are the main factors affecting the thrust of engine unit in the energy bypass system. Within the range of these parameters Reasonable value, taking into account the constraints of material and technology implementation, the performance analysis shows that the MHD-Arc-Scramjet combined cycle engine has the obvious unit thrust advantage compared with the traditional ramjet engine at the flow rate of 2 800 ~ 4 000 m / s.