小间距梯形扰流柱通道内的流动换热数值计算  

Numerical simulation on flow and heat transfer in channel with small spacing short pin-fin arrays

作　　者：张丽[1] 张书华[1] 朱惠人[1] 刘松龄[1] 

机构地区：[1]西北工业大学动力与能源学院,西安710072

出　　处：《航空动力学报》2009年第1期13-17,共5页Journal of Aerospace Power

基　　金：APTD项目(APTD-1203-02-03)

摘　　要：为了深入了解涡轮叶片尾缘扰流柱区域的流动结构和换热情况,通过数值计算研究了小间距梯形扰流柱通道内的流动和换热.数值计算结果表明:①数值计算得到的端壁静压分布、弦向出流量分布、总压系数与实验结果符合良好,端壁换热分布规律总体上与实验结果一致.②扰流柱区域的流动方向基本为弦向.沿弦向湍流度是逐渐升高的,靠近弦向出口扰流柱后的湍流度比较低.数值计算结果对涡轮叶片内部冷却计算具有重要的参考价值.Numerical simulation was conducted to gain greater insight into the flow structure of trapezoidal pin-fin duct and get detailed knowledge of the heat transfer on the endwall surface. The array geometries have short pin heights and small chord-wise pin spacing. Numerical results show that, the calculated flow resistances and chord-wise ejection mass flow rate agree well with the experimental data, and the heat transfer pattern is well simulated. The numerical results also show that the flow direction in pin-fin region is mainly chord-wise. There are a lower velocity and lower turbulence intensity region behind the cylinder.

关 键 词：流动换热 小间距扰流柱 数值计算 燃气轮机 冷却叶片 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]