FILM COOLING PERFORMANCE OF CYLINDRICAL HOLES EMBEDDED IN A TRANSVERSE TRENCH

被引：52
|
作者：
Lee, Ki-Don [1 ]
Kim, Kwang-Yong [1 ]
机构：
[1] Inha Univ, Dept Mech Engn, Inchon 402751, South Korea
来源：
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS | 2014年 / 65卷 / 02期
基金：
新加坡国家研究基金会;
关键词：
SHAPED HOLES; CONFIGURATIONS;
D O I：
10.1080/10407782.2013.826106
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The film cooling performance of cylindrical holes embedded in a transverse trench is evaluated for various shapes of the trench and blowing ratios, and an optimum geometry for the trenched film-cooling hole is suggested. In order to analyze the turbulent flow and film cooling performance, three-dimensional Reynolds-averaged Navier-Stokes analysis is performed using the shear stress transport turbulence model. Tetrahedral and hexahedral computational meshes are tested, and the numerical solution is validated by comparison with experimental data. A parametric study with two geometric variables, the height and width of the trench, is performed. From the results of the parametric study and flow field analysis, shifting the film cooling hole toward the upstream end of the trench is proposed to enhance film cooling performance. In addition, the optimum downstream trench width is determined.
引用
收藏
页码：127 / 143
页数：17
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