Coexistence of detonation with deflagration in rotating detonation engines
Coexistence of detonation with deflagration in rotating detonation engines
复制标题
旋转爆震发动机中爆震与爆燃的共存
DOI：
10.1016/j.ijhydene.2016.06.026
复制
发表时间：
2016
影响因子：
7.2
通讯作者：
Wang Jianping
中科院分区：
文献类型：
--
作者：
Wang Yuhui;Wang Jianping
具有高热效率和高比冲的旋转爆震发动机已经得到了大量的研究。但是，旋转爆震波会导致燃烧室流场不均匀，局部高温高压，容易造成燃烧室的破坏。本文介绍了一种既能保持旋转爆震波又能保持燃烧室中爆燃的实验方法，它将旋转爆震发动机和爆燃发动机的优点联合收割机结合起来。压力传感器测量旋转爆震波的压力，气体质量流量控制器控制反应物的质量流率。一个标准的高速摄像机捕捉旋转爆炸和爆燃的事件。发现旋转爆轰比爆燃强烈得多。燃烧室中可以同时存在上游旋转爆轰波和下游爆燃波，这两种波分别依赖于主气流和支流。预爆管是燃烧室中爆震区和爆燃区的分界线。爆轰与爆燃的共存减弱了旋转爆轰引起的燃烧不稳定性，这可能有助于旋转爆轰的应用。
Rotating detonation engines of high thermal efficiency and specific impulse have been studied a lot. However, rotating detonation waves lead to uneven flow field, local high temperature and high pressure, tending to damage the combustor. An experimental way to keep both rotating detonation waves and deflagration in the combustor and to combine the advantages of rotating detonation engines and deflagration engines, is introduced here. Pressure sensors measure the pressure of rotating detonation waves and gas mass flow controllers control the mass flow rates of reactants. A standard speed camera captures the events of rotating detonation and deflagration. It is discovered that the rotating detonation is much more intense than deflagration. Both upstream rotating detonation waves and downstream deflagration respectively dependent on the trunk stream and the tributary can coexist in the combustor. The predetonator is the boundary between the detonation region and deflagration region in the combustor. The coexistence of detonation and deflagration weakens the combustion instability caused by rotating detonation, which may be helpful for rotating detonation to be applied.