| 引用本文: | 刘彧,周进,晏至辉.不同隔板构型下的超声速混合层流场特性.[J].国防科技大学学报,2013,35(5):1-5.[点击复制] |
| LIU Yu,ZHOU Jin,YAN Zhihui.Study on the flow fields of supersonic mixing layer with splitters of different geometric configurations[J].Journal of National University of Defense Technology,2013,35(5):1-5[点击复制] |
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| 不同隔板构型下的超声速混合层流场特性 |
| 刘彧, 周进, 晏至辉 |
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(国防科技大学 高超声速冲压发动机技术重点实验室，湖南 长沙 410073)
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| 摘要: |
| 利用实验和数值仿真相结合的方法，对Ma1=1.5，Ma2=2.5，T0,1=300K，T0,2=1200K，压力匹配（p1=p2=86kPa）条件下的超声速混合层在不同隔板构型下的流场特性进行了研究。实验中发现在隔板上开凹腔对于混合层具有一定的混合增强效果，且凹腔长深比越大，这种效果越显著。对于尾缘交错分布的隔板，混合层流场显现出强烈的非定常性，且极大地增进了混合。通过相应的数值仿真发现，凹腔隔板的增混机制在于凹腔剪切层的再附着，而交错隔板则在于促进了大尺度流向涡的产生。 |
| 关键词: 超声速混合层 混合增强 凹腔剪切层 流向涡 |
| DOI： |
| 投稿日期：2013-01-27 |
| 基金项目:国家自然科学基金资助项目（91016028，91016012） |
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| Study on the flow fields of supersonic mixing layer with splitters of different geometric configurations |
| LIU Yu, ZHOU Jin, YAN Zhihui |
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(Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Through combining an experiment and a numerical simulation, a study was carried out on supersonic mixing layer with splitters of different geometric configurations, which is under the condition of Ma1=1.5，Ma2=2.5，T0,1=300K，T0,2=1200K，and matched pressure p1=p2=86kPa.In the experiment, it was discovered that the thickness of mixing layer in the flow field with splitters in which a cavity is mounted grows as the ratio of the length to the depth of the cavity becomes larger; Splitters with sawtooth trail show great effect of mixing enhancement and making the flow field highly unsteady. In the numerical study, it was demonstrated that the mixing-enhancement effect of splitters with cavity is due to the cavity shear layer’s reattachment to the trail of the splitter, and splitters with sawtooth trail due to induced large-scale streamwise vortexes. |
| Keywords: supersonic mixing layer mixing enhancement cavity shear layer steamwise vortex |
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