| 引用本文: | 游进,夏智勋,刘冰,等.基于再起动特性优化的高超声速进气道设计.[J].国防科技大学学报,2011,33(4):38-42,151.[点击复制] |
| YOU Jin,XIA Zhixun,LIU Bin,et al.Design Research of Scramjet Inlet Based on the Optimization of Restarting Characteristics[J].Journal of National University of Defense Technology,2011,33(4):38-42,151[点击复制] |
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| 基于再起动特性优化的高超声速进气道设计 |
| 游进, 夏智勋, 刘冰, 王登攀 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 对不同内收缩段设计的高超声道流场进行了数值仿真研究，考查了下壁面水平倾角对进气道各性能参数特别是再起动特性的影响。结果表明，减小进气道
不起动流场大规模分离区尾部所在下壁面的水平倾角，可以显著提高不起动流场的性能，大幅降低再起动马赫数，但也带来内收缩段长度增加，起动流场性能降低的缺点。为兼顾两者性能，提出了一种新的内收缩段下壁面设计方案，该设计前段采用凹面收缩段，后段接以水平倾角更小的平直段。与原型相比，新设计的长度不变，起动流场的性能波动较小；而再起动马赫数则由9.4降为8，再起动特性改善效果明显。 |
| 关键词: 高超声速进气道 再起动特性 内收缩段设计 大规模分离区 |
| DOI： |
| 投稿日期：2010-10-28 |
| 基金项目:国家部委基金项目(9140A28030309KG01) |
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| Design Research of Scramjet Inlet Based on the Optimization of Restarting Characteristics |
| YOU Jin, XIA Zhixun, LIU Bin, WANG Dengpan |
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(College of Aerospace and Materials Engineering, National Univ.of Defense Technology, Changsha 410073, China)
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| Abstract: |
| The numerical study of hypersonic inlet flow with different inner compression surface was carried out, aimed at exploring the influence of horizontal angle of lower inlet surface on inlet performance specially restarting characteristics. The result shows that the reduction of surface horizontal angle on the tail of separation bubble will improve the performance of unstart flow and decrease the restart Mach number, with the disadvantage of increasing length of inner compression surface and reducing the performance of start flow. To optimize the synthetic performance of inlet, a new design of inner compression lower surface composed of the concave surface in the front and the straight
surface with small horizontal angle in the rear was proposed. Compared with the prototype, the performance of start flow drop lightly under the same length for new inlet, but the restart Mach number of latter reduce from 9.4 to 8. |
| Keywords: hypersonic inlet restart characteristics inner compression surface design separation bubble |
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