某高压涡轮第一级导叶传热设计计算

Heat transferring design for the first guide blade of a high pressure turbine

摘要:

为进一步提升燃气轮机涡轮效率,优化冷却结构设计,以某高压涡轮第一级导叶为研究对象,基于数值模拟方法自编Matlab传热程序,结合CFX叶片三维温度场导热进行计算,包括基于管网计算的方案设计和三维传热计算．针对该叶片的特点重新设计了冷却结构．结果表明:叶片局部出现约1 700 K高温区,但尾缘扰流冷却结构增强了换热系数,叶片平均温度较低,约1 300 K．从该导叶的设计过程及计算结果可看出,所使用的冷却结构设计平台可高效完成冷却结构方案设计及三维温度分布验证计算．

Abstract:

Based on Matlab heat transferring program and combined with CFX three-dimensional temperature field of thermal conductivity for calculation, included design of pipe network computing plan and three dimensional heat transferring calculation, a guiding blade of high pressure turbine is researched and the cooling structure is designed according to the characteristics of the guiding blade. A high temperature zone about 1 700 K appears on the blade, but the average temperature is about 1300 K, because the trailing edge vortex cooling structure enhances heat transfer coefficient. A good cooling structure design and verifying calculation of temperature distribution in 3 D can be completed on the cooling structure design platform.