涡轮导向叶片变截面针肋通道内空气流动和传热过程数值模拟

NUMERICAL MODELING OF TURBULENT FLOW AND HEAT TRANSFER IN A PIN-FINNED CONVERGENT PASSAGE OF GAS TURBINE GUIDING VANE

应用紊流ｋ－ε模型、三维适体座标网格结合ＳＩＭＰＬＥＳＴ算法，对涡轮导向叶片尾部变截面针肋通道内空气流动和传热过程进行了数值模拟。该模拟同时考虑了流场、压力场、温度场和物性变化之间的相互耦合作用，可压缩和变物性的影响以及叶片壁内三维导热效果，采取对流—导热耦合传热问题的整体求解法进行数值计算。计算结果与实验符合良好，证明本文建立的数值模型是正确的，可为叶片的优化设计提供一定的依据。

A numerical model of cooling air flow and heat transfer in a pin-finned convergent passage of gas turbine guiding vane was set up,which employed a turbulent k-ε model,a 3D Body Fitted Coordinates (BFC),the SIMPLEST Algorithm and the whole field solving method of convection-conduction conjugate heat transfer problem,taking the interlinks among the flow field,pressure field,the temperature field,the property variation and the effects of compressibility and 3D heat conduction inside a guiding vane shell into consideration.The computation results are in a good agreement with experimental data.