重型燃机透平叶片外壁面换热的数值研究

摘要

开发了重型燃机叶片的外换热及气膜修正程序，对某重型燃机的透平第一级静叶片进行了外换热计算，并针对有气膜冷却的叶片对外换热系数进行了修正，分析了不同截面叶型的换热系数分布和湍流度对换热的影响，同时对比了气膜修正前后的换热系数，得到了叶片外部换热特点。%This article developed the external heat transfer program for heavy gas turbine blade ,and calculated the EHTC (external heat transfer coefficients) of some heavy gas turbine first stage stator blade ,corrected the EHTC with the air-film correction program. The distribution of the HTC along the blade profile on different sections was analyzed. The effect of the turbulence intensity on the heat transfer was also discussed. The HTC before and after air-film corrected was compared. Thus, we got the external heat transfer characteristics of blade.