横流对冲击射流换热特性影响机理的数值研究

张传杰; 孙纪宁; 谭屏

横流对冲击射流换热特性影响机理的数值研究

北京航空航天大学能源与动力工程学院航空发动机气动热力科技重点实验室,北京 100191

基金项目: 中央高校基本科研业务费专项资金(YWF-10-02-043); “凡舟”青年科研基金(20080402)

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出版历程
- 收稿日期: 2009-11-27
- 修回日期: 2010-04-21
- 刊出日期: 2011-01-28

Numerical investigation on heat transfer mechanism of impingement jet with cross-flow

National Key Laboratory of Science and Technology on Aero-Engines, School of Jet Propulsion,Beijing University of Aeronautics and Astronautics, Beijing 100191,China

摘要

摘要: 采用数值模拟的方法对冲击腔上游冲击产生的横流对下游冲击射流的影响进行了研究.结果表明,①随横流增大,射流冲击靶面平均努塞尔数呈现复杂的变化规律.②横流对冲击靶面平均努塞尔数的影响主要体现在两个方面:随横流雷诺数增大,冲击下游的拉伸涡对强度呈现先增大后减小的趋势,对换热的影响也是先增大后减小;横流使冲击射流偏移,导致高换热区域后移.③射流和横流对于换热强度的影响随着横流增大不断变化,造成冲击靶面复杂的换热规律.
- 横流 /
- 冲击射流 /
- 马蹄涡 /
- 数值模拟 /
- 换热
Abstract: Numeration analysis was made to simulate the influence induced by upstream jet on downstream jets in impingement chamber.The results shows that,(1) As the cross-flow increases,the heat transfer efficiency on the impinged surface changes in a very complicated way.(2) Cross-flow influences the heat transfer of the impinged surface mainly in two aspects:as the cross-flow Reynolds number increases,the strength of stretched vortex pair downstream of the jet firstly increases and then decreases,resulting in the same influence on the heat transfer of the target surface;the deviation of the impinging jet induced by cross-flow makes the high heat transfer zone move backward. (3) As cross-flow increases,the heat transfer efficiency induced by impingement and cross-flow changes,making the heat transfer on the target surface more complicated.
- cross-flow /
- impingement jet /
- horseshoe vortex /
- numerical simulation /
- heat transfer

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参考文献(12)

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