Experimental study of a hydrogen-air rotating detonation engine with variable air-inlet slot
Experimental study of a hydrogen-air rotating detonation engine with variable air-inlet slot
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可变进气槽氢-空气旋转爆震发动机试验研究
DOI：
10.1016/j.ijhydene.2018.05.033
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发表时间：
2018-06
影响因子：
7.2
通讯作者：
Liu Daokun
中科院分区：
文献类型：
--
作者：
Zhou Shengbing;Ma Hu;Li Shuai;Zhou Changsheng;Liu Daokun
近年来，旋转爆震发动机引起了人们的广泛关注。本研究采用可变进气口的H2/空气旋转爆震波进行了起爆旋转爆震波实验。结果表明：随着槽宽的增大，爆震波压力和爆震波速度的稳定性均呈现先增大后减小的趋势，增大等效比可以提高爆震波速度的稳定性；在d= 0.5 mm的试验中，反射波强度较强，导致新鲜混合物提前点火，速度赤字高达20%。气室与燃烧室相互作用强，混合效果差，可能是造成大型槽口试验爆震波不稳定的原因。相对于其他试验，进气口孔径为1 mm的试验效果最好，产生稳定爆震波的等效比范围较宽。
Rotating detonation engines have attracted considerable attentions in recent years. In this study, the experiments of initiating rotating detonation waves were performed on a H2/air rotating detonation wave with the variable air-inlet slot. The results showed that the stability of detonation-wave pressure and velocity both initially increased and then decreased with the increase of slot width, and it could improve the stability of detonation-wave velocity via increasing the equivalence ratio. The intensity of reflected wave was strong for the tests ofd= 0.5 mm, which leaded to the advance ignition of fresh mixture and a velocity deficit reaching up to 20%. The strong interaction between air plenum and combustor and bad mixing effect may be the reasons of forming unstable detonation wave for the tests of large-scale slots. The air-inlet slot ofd= 1 mm, which got a best experiment results relative to other tests, had a wide equivalence-ratio scope to produce stable detonation wave.
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