喷管收敛-扩张角对爆震发动机性能影响分析

为了研究喷管收敛-扩张角对爆震发动机性能的影响,以氢气和氧气混合物为例,对不同喷管收敛-扩张角下的爆震发动机工作过程进行了数值模拟,结果表明,不同喷管收敛-扩张角对爆震发动机性能的影响并不相同。增大扩张角,喷管出口面积增大,推力投影面积增大,排气时间减少,喷管内压力下降较快。收敛角为5°或扩张角为5°时的爆震发动机性能较好。

Investigation on the effects of nozzles with different convergent-divergent angle on PDE performance

In order to investigate the effects of nozzles with different convergent-divergent angle on PDE performance,PDE with different nozzle convergent-divergent angle were simulated and hydrogen-oxygen mixture was used.The results indicate that different nozzle convergent-divergent angle has different effects on PDE performance.As divergent angle increases,area of nozzle outlet and thrust projection area increases,but exhaust time and pressure in nozzle decreases.When convergent angle is of 5°or divergent angle is of 5°,the performance of PDE is good.