摘要
本文对不带肋和带45°肋气膜冷却平板的三维对流换热与导热耦合传热问题进行了数值模拟。网格划分采用非结构化网格,湍流模型为SSTκ-ε模型,近壁处采用壁面函数法,采用SIMPLEC算法求解速度和压力的耦合。计算获得了不带肋和带45°肋气膜冷却平板的流场分布和平板内外表面的换热系数值。结果表明带45°肋的气膜冷却平板通道流场结构比较复杂,平板表面平均温度较无肋气膜冷却平板表面平均温度下降,而在近气膜孔区域冷、热表面平均换热系数较无肋时增大。
The flows and temperature field in internal film cooled flat plates with and without 45-deg ribs was investigated numerically. The finite volume method with unstructured meshes was used to solve the three dimensional compressible Navier-Stokes equations. The SST k - ω; turbulence model was used with the enhanced wall function for the near wall treatment. The velocity and pressure coupling used the SIMPLEC algorithm. The analysis produced the flow distributions and the heat transfer coefficients on the internal and external surfaces of the film cooled flat plate without and with 45-deg ribs. The numerical results show that the average surface temperatures of the hot and cold surfaces of the plate with the 45-deg ribs were lower than those without the ribs, the average heat transfer coefficients in the hot and cold surfaces near the film cooling holes of the plate with 45-deg ribs were higher than those without ribs.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2005年第5期844-846,共3页
Journal of Engineering Thermophysics
基金
国家杰出青年科学研究基金资助项目(No.50025617)
关键词
气膜冷却
肋
温度
换热系数
数值模拟
film cooled
rib
temperature
heat transfer coefficient
numerical simulation
