Influences of Contoured Crater Depth and Expansion Angle on Wall Film Cooling Performance

被引：0

作者：

Zhang, Zihan ^{[1
]}

He, Kun ^{[1
]}

Yan, Xin ^{[1
]}

机构：

[1] School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an,710049, China

来源：

Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2021年 / 55卷 / 09期

关键词：

Blowing ratio - Circumferential direction - Cooling hole - Expansion angles - Film cooling effectiveness - Film cooling performance - Hot mainstreams - Optimal depth;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The influences of crater depth and expansion angle of contoured crater hole on film cooling performance were numerically investigated at different blowing ratios and then compared with the conventional round hole. The results show that, with the increase of contoured crater depth, the spanwise components of coolant momentum decrease and the circumferential components increase. The coolant coverage region on the wall expands, and the coolant rising position from the wall delays. With contoured crater depth increasing, the film cooling performance is improved. In addition, this improvement is enhanced with the blowing ratio. Compared with the conventional round hole, the averaged film cooling effectiveness of the optimal depth contoured crater hole(d=2.3D, M=1.5) is increased downstream of the cooling hole by about 500% (when X/D © 2021, Editorial Office of Journal of Xi'an Jiaotong University. All right reserved.

引用

页码：49 / 59