旋转条件下半封闭空间内多孔冲击平均换热特性实验

杨敏; 常海萍; 吴培光

旋转条件下半封闭空间内多孔冲击平均换热特性实验

1.
北京航空航天大学航空科学与工程学院, 北京 100083
2.
南京航空航天大学能源与动力学院, 南京 210016
3.
第二炮兵司令部工程部, 北京

基金项目: 国家自然科学基金资助项目(50276027);国防基础科研资助项目(J1400D001)

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出版历程
- 收稿日期: 2005-12-12
- 修回日期: 2006-06-21
- 刊出日期: 2006-12-28

Experimental investigation of the rotating multiple jets impingement heat transfer chracteristic in semi-limited space

1.
College of Aeronautic Science & Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
2.
College of Energy & Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
3.
Department of Engineering, Headquarters of the Second Artillery, Beijing

摘要

摘要: 通过实验研究了冲击雷诺数Re_j、旋转雷诺数Re_ω、以及冲击孔的排列方式、冲击孔到靶板之间的距离等参数,对旋转条件下半封闭空间内多孔冲击平均换热特性的影响。实验结果表明:随着冲击雷诺数的增大,多孔冲击的平均Nu数显著提高;随着旋转雷诺数的增大,平均Nu数稍有提高,但变化幅度不大;冲击孔的排列方式对平均换热效果也有一定的影响,叉排式稍优于顺排式;并且实验得出,冲击孔到靶板之间的距离为4倍冲击孔直径时多孔冲击平均换热效果最佳。
- 航空、航天推进系统 /
- 冲击 /
- 冷却 /
- 换热特性 /
- 旋转
Abstract: The effects of jet Reynolds number(Rej),rotation Reynolds number(Reω),the jet-holes array and the distance of jet-to-plate on multiple jets impingement cooling were studied by experiments.The results show that:(1) The average Nu number of heat transfer of multiple jets impingement cooling increases significantly with the increasing of jet Reynolds number but have less increment with that of rotation Reynolds number.(2) The jet-holes array has certain effect on the average heat transfer of multiple jets impingement,cross jet-hole array is somewhat better than that of the ordinal array.(3) When the distance of jet-to-plate is four times the jet-hole diameter,the average heat transfer effect of impingement cooling is the best.
- aerospace propulsion system /
- impingement /
- cooling /
- heat transfer characteristics /
- rotation

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参考文献(11)

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