Effects of deposition locations on film cooling with and without a mist injection

被引:15
|
作者
Wang, Jin [1 ]
Cui, Pei [1 ]
Sunden, Bengt [2 ]
Yang, Ran [3 ]
机构
[1] Hebei Univ Technol, Sch Energy & Environm Engn, Tianjin, Peoples R China
[2] Lund Univ, Div Heat Transfer, Dept Energy Sci, Lund, Sweden
[3] PERA GLOBAL Ltd, Beijing, Peoples R China
关键词
BARRIER COATING SPALLATION; HEAT-TRANSFER; TURBINE BLADE; LEADING-EDGE; GAS-TURBINE; HOLES; PERFORMANCE; OPTIMIZATION; SIMULATIONS; CHANNELS;
D O I
10.1080/10407782.2016.1230395
中图分类号
O414.1 [热力学];
学科分类号
摘要
The adiabatic film-cooling effectiveness on a thermal barrier coating surface is investigated numerically. A film-cooling hole with an inclination angle of 35 degrees is placed upstream the deposition configuration. The depositions are arranged on the external wall with three different positions. For no-mist models, the cooling performances downstream the wall are investigated for the blowing ratios of 0.5, 0.75, and 1.0. Results show that the adiabatic film-cooling effectiveness without surface deposition is decreased by increasing the blowing ratio. To investigate the effects of both different locations and 4.4% mist injection on the film cooling, a discrete phase model (DPM) is used. It is found that the film-cooling effectiveness is improved remarkably from the deposition position to the wall downstream. In addition, deposition formation at the middle location shows a good cooling effectiveness, but the lowest value of the film-cooling effectiveness occurs upstream the deposition position.
引用
收藏
页码:1072 / 1086
页数:15
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