Influence of injector structure details on mixing characteristics of continuous detonation engine
In order to study the influence of different injector structure details on the cold mixing characteristics of GH2/GO2 continuous detonation engine,the cold flow field of GH2/GO2 continuous detonation engine was numerically simulated with commercial software Fluent.Based on the annular-hole injector structure,12 different engines with different injector structures were designed.The influences of different oxygen injector outlet expansion angles,different hydrogen injection angles,different hydrogen injector outlet expansion angles,and unilateral injection on the mixing characteristics were studied under the same inlet conditions.The results showed that the mixing effect decreased first and then increased when the expansion angle of oxygen injector outlet was within the range of 0°-20°,and the optimum expansion angle was 20°.When the hydrogen injection angle was within the range of 30°-90°,the mixing effect increased first and then decreased,and the optimal injection angle was 45°.Within the range of 0°-10°,increasing the expansion angle of the hydrogen injector outlet reduced the mixing effect.The mixing effect of gas-hydrogen bilateral injection was obviously better than that of unilateral injection.
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