Orthogonal simulation of multi-factor influenced film cooling efficiency

ZHANG Ling; ZHU Jian; SHI Jingkai; WANG Chong

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Orthogonal simulation of multi-factor influenced film cooling efficiency

Thermal Power Generation Vol. 44, Issue 6, Pages: 68-71(2015)

更新时间：2025-09-28

- Orthogonal simulation of multi-factor influenced film cooling efficiency
- 作者机构：
  
  1. 东北电力大学能源与动力工程学院
  2. 内蒙古岱海发电有限责任公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK473
- Published：2015
- 稿件说明：
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ZHANG Ling, ZHU Jian, SHI Jingkai, et al. Orthogonal simulation of multi-factor influenced film cooling efficiency[J]. Thermal Power Generation, 2015, 44(6): 68-71.
DOI：

ZHANG Ling, ZHU Jian, SHI Jingkai, et al. Orthogonal simulation of multi-factor influenced film cooling efficiency[J]. Thermal Power Generation, 2015, 44(6): 68-71. DOI：

摘要

利用Fluent软件对N-S方程进行求解

采用Realizable k-ε模型

通过正交方法模拟孔型(选取姊妹孔、开槽圆柱孔、开槽姊妹孔)、吹风比和湍流度3个因素对平板气膜冷却效果的影响

选择最优冷却方案。结果表明:孔型对平板冷却效率的影响最大;采用开槽圆柱孔、吹风比为2.0、湍流度为15%时

平板表面气膜冷却效率最佳

比最低方案的冷却效率高167%

为3因素影响下的最优方案;采用姊妹孔冷却平板

气膜覆盖范围较小

平均冷却效率随吹风比的增大而降低;横槽与离散孔的有效结合能够抑制反向对涡旋的形成

从而提高冷却效率。

Abstract

The N-S equation was solved by the Fluent software.On the basis of Realizable turbulence model and orthogonal method

the cooling effectiveness of film with different hole patterns

blowing ratios and turbulence intensities was analyzed with CFD techniques to select the optimal cooling scheme.The results show that

hole pattern had the most dramatic influence on cooling efficiency

and then the turbulence intensity

blowing ratio has the weakest effect.When slotted cylindrical hole was applied with blowing ratio of 2.0and turbulence intensity of 15%

the film cooling efficiency reached the highest

which is 167% higher than the lowest value.For the plate using sister-hole cooling

the coverage area was small and the avenage cooling efficiency decreased with the increasing blowing ratio.The effective combination of hole and slot can inhibit the formation of vortex pair

thus to enhance the cooling efficiency.

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