| 摘要: |
| 为了解凹腔火焰稳定器的工作过程,通过试验和数值仿真手段,对超声速条件下凹腔的流动特性进行了深入细致的研究,探讨了气/液喷流与超声速凹腔流动的相互作用机理。研究结果表明,无喷流时超声速凹腔流场具有五个典型的特征;引入喷流会引入新的流场特征,同时流场结构会发生机理性的变化;气/液喷流对凹腔整体流动特征的影响是一致的;有气体喷流时,不同压降下凹腔流场结构是类似的;而对液体喷流而言,提高喷注压降会增加雾化距离、射流穿透度、喷流厚度,提高来流速度则会使其减小。 |
| 关键词: 超音速冲压喷气发动机 超音速流动+ 凹腔+ 火焰稳定器 数值仿真 |
| DOI： |
| 分类号:V231.2 |
| 基金项目:国家“八六三”项目(2002AA723060) |
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| Interaction between gas/liquid injection and supersonic flow over cavities |
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FANG Tian-wen1, DING Meng2, LIU Wei-dong3, ZHOU Jin4
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1.Inst.of Aerospace and Material Engineering,National Univ.of Defence Technology,Changsha 410073,China;2.Inst.of Aerospace and Material Engineering,National Univ.of Defence Technology,Changsha 410074,China;3.Inst.of Aerospace and Material Engineering,National Univ.of Defence Technology,Changsha 410075,China;4.Inst.of Aerospace and Material Engineering,National Univ.of Defence Technology,Changsha 410076,China
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| Abstract: |
| To comprehend the working process of cavity flame holder,characteristics on supersonic flow over cavities were thoroughly investigated by means of experiments and numerical simulations.Interaction between gas/liquid injection and supersonic cavity flow was studied.Results indicate that there are five traits in supersonic cavity flow field without injection;and injection will introduce new traits to the flow field.The structure will alters in mechanism;both gas and liquid injection produce similar effects on the whole cavity flow field;the structures of flow field with gas injection under different pressure drops are homologous;as for liquid injection,larger pressure drop leads to increase of atomization length,penetration depth,and spray thickness,while enhancing free stream velocity leads to decrease it. |
| Key words: Supersonic combustion ramjet engine Supersonic flow+ Cavity+ Flame holder Numerical simulation |
