涡轮叶片尾缘出流对带叉排扰流柱阵列的内冷通道传热特性的影响

本文用实验的方法模拟研究了涡轮叶片尾缘出流对带叉排扰流柱阵列的内冷通道的对流换热特性的影响。实验模型通道为矩形通道，扰流柱的排列参数Ｓｎ／ｄ为６．５，Ｓｐ／Ｓｎ为１．２，其中ｄ为扰流柱的直径，Ｓｎ为扰流柱横向间距，Ｓｐ为２倍的纵向间距。矩形模型通道的长边与转轴的夹角为２０°。研究了出流孔总面积Ａ０与通道最大截面积Ａ的比值，雷诺数Ｒｅ，转动数Ｒｏ等参数对传热特性的影响。并比较了尾缘出流与叶尖出流的换热特性。

EFFECT OF TRAILING EDGE EJECTION OF TURBINE BLADES ON HEAT TRANSFER OF COOLING PASSAGE WITH STAGGERED PIN FINS

An experimental research was conducted to simulate the effect of trailing edge ejection of turbine blades on heat transfer of the inner cooling passage with staggered pin fin array.The test model was a rotating rectangular duct with staggered pin fin array.The parameter of S n/d equals 6 5 and S p/S n takes a value of 1 2,where d is the diameter of the pin fin, S n and S p are the transverse space and twice the axial space between pin fins respectively.The angle between the long side of the rectangular duct and the rotation axis is 20 degree.The effects of the ratio between the total area of the trailing edge ejection holes A 0 and the maximum cross section area of the duct A ,Reynolds number Re ,rotation number R o and other relevant parameters on heat transfer were investigated.The heat transfer characteristics of the rotation rectangular duct with trailing edge ejection were compared to those with top end ejection.