叶片尾缘内冷通道中最佳强化传热的针肋排列结构研究

INVESTIGATION OF THE BEST AUGMENTED HEAT TRANSFER OF PIN-FIN ARRAYS IN PASSAGE FOR TRAILING EDGE OF TURBINE BLADE

本文应用湍流模型对涡轮叶片尾缘针肋通道的换热与流动进行了二维数值模拟研究。为了研究通道内针肋排列 方式对换热与流动的影响,对三种不同的针肋排列方式的通道进行了数值模拟计算。比较了顺排和叉排的区别,并提出了 一种沿流向叉排的针肋排列方式,且对各种排列的传热和阻力特性进行了综合分析和比较。

In this paper, heat transfer and fluid flow in passage for trailing edge of turbine blade with pin-fin arrays is studied numerically. Two-dimensional numerical simulation proceed for steady turbulent flow in the passage with three different types of pin-fin arrays for trailing edge of cooling blade to study the effect of pin-fin arrays on heat transfer and fluid flow. Compared in-line pin-fin arrays with staggered pin-fin arrays, a type of staggered pin-fin arrays along the flow is suggested, heat transfer and pressure drop for the pin-fin passage are compared and analyzed.