冷却涡轮定常/非定常流场的内外耦合快速计算方法

通过源项传递的方法将计算叶片内部流动与冷却的流体网络法与计算叶片外部冷却的源项模拟法耦合起来并嵌入到叶片外部三维气动计算程序中,实现了整个冷却涡轮叶片流热环境的快速模拟.基于此方法编写了计算机程序CTUCP.首先将程序应用到涡轮静叶栅C3X的定常冷却计算中,并与CFX的计算结果进行了对比,结果表明:CTUCP计算稳定、计算速度要快一个数量级以上,并且对叶片表面前缘之外区域的温度分布总体趋势预测基本相符.然后将程序应用到C3X脉动冷却的计算中,计算了两种冷气进气脉动幅度下叶片的冷气与壁温脉动特点.

Quick calculation method of internal/external conjugation for steady/unsteady flow field in cooled turbine

A source transfer method, which is used to couple the flow network calculation of blade internal flow and source simulation of blade external cooling, was embedded into a 3D aero code, which is usually used to calculate blade external flow, then a quick simulation of a whole cooled blade was carried out. A computer program called CTUCP was developed based on this method. CTUCP was first used to calculate the steady cooling of the turbine vane cascade C3X, and the result was compared with the result of CFX, proving that CTUCP can calculate stably, faster by one order of magnitude, and give close prediction of the blade wall temperature distribution trend except at the leading edge. Next, CTUCP is used to calculate pulsed cooling of C3X, obtaining the characteristic of the coolant and wall temperature under two different pulse amplitudes.