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分别对采用不同面积比、不同长径比的收敛喷管、扩张喷管和收扩喷管的吸气式脉冲爆震发动机(PDE)进行了多循环爆震试验研究,着重研究了不同工作频率下喷管面积比和长径比对吸气式PDE性能的影响.研究发现,各个工作频率下,收敛喷管均能显著提高发动机性能,面积比越小,增推效果越好,最大能够达到32%;扩张喷管则降低发动机性能或者增推效果有限;收敛扩张喷管增推效果略低于对应面积比的收敛喷管.喷管长径比对吸气式PDE性能影响不大,随着长径比增加,PDE推力略有降低.

参考文献

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