Experimental Investigation of Transpiration Cooling on a Porous Plate with Phase Change in Supersonic Flow Tunnel

被引：0
|
作者：
Liao Z.-Y. [1 ]
Zhu Y.-H. [1 ]
Huang G. [1 ]
Xu R.-N. [1 ]
Jiang P.-X. [1 ]
机构：
[1] Department of Energy and Power Engineering, Tsinghua University, Beijing
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2019年 / 40卷 / 05期
关键词：
Phase change; Porous media; Supersonic; Transpiration cooling;
D O I：
10.13675/j.cnki.tjjs.180633
中图分类号：
学科分类号：
摘要：
Transpiration cooling with phase change is an efficient active cooling technology for thermal protection on critical devices of hypersonic vehicles. With a high specific heat capacity and a high latent heat of phase change, water is effective for transpiration cooling. This paper investigated transpiration cooling with phase change on a porous plate in a supersonic wind tunnel with a Mach number of 2.2 and a total temperature of 500K. The unsteady process of coolant injection was also observed. The results show that the average cooling efficiency on the porous plate surface increases with the increase of the injection rate, and the liquid coolant flows out from the upstream surface initially and spreads downstream under supersonic mainstream condition. The cooling efficiency of the upstream region on the porous plate is higher than that of the downstream region. The uniformity of the surface temperature increases with the coolant injection rate. The injection pressure of the coolant increases first then decreases and finally increases as the injection rate increases with the water vapor generation. The cooling efficiency on the porous plate surface is above 0.6 with a small coolant injection rate of F=0.05%, which shows that transpiration cooling with phase change has the advantages of low coolant dosage and high cooling efficiency. © 2019, Editorial Department of Journal of Propulsion Technology. All right reserved.
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页码：1058 / 1064
页数：6
相关论文
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