摘要
对不同平板厚度的圆柱孔平板气膜冷却模型进行了数值研究,其中冷却空气入射角均为35°,湍流模型采用Standardk-ε湍流模型。所研究的模型分为单孔模型和排孔模型,板的厚度分为4mm、2mm及0mm。文章的重点在于分析平板的传热对气膜冷却效果的影响,研究结果显示气膜冷却效率沿主流方向逐渐降低,当吹风比为0.8时冷却效率最高,平板内部导热对气膜冷却效率及平面温度分布有较大影响。
Numerical research has been carried out on film cooling efficiency of the plate with inclined cylinder hole.During the numerical research standard k-ε turbulence model was employed and the incidence angle of the cooling air is 35°.The physical models include sole hole and row holes models and the thickness of the plate is 4mm、2mm and 0mm.Heat transfer influence of the plate on film cooling efficiency is mainly analyzed.The results show that the film cooling efficiency is reduced along the main stream direction,and the best film cooling efficiency comes up when the blowing ratio is about 0.8,and the film cooling efficiency is influenced by heat conduction of the plate obviously.
出处
《机械研究与应用》
2011年第3期87-90,92,共5页
Mechanical Research & Application
基金
上海市教委重点学科建设项目资助(J50501)
关键词
气膜冷却
数值模拟
吹风比
平板厚度
传热
film cooling
numerical study
blowing ratio
the thickness of the plate
heat transfer
