气冷涡轮叶片三维换热问题计算

Numerical study of 3D heat transfer for turbine blade with air cooling

建立了三维气冷涡轮叶片换热计算的热-流耦合计算模型,将辐射热量作为源项加入到方程中,采用热-流耦合方法完成了某气冷涡轮叶片带辐射的三维换热计算.辐射热量的计算采用了P-1辐射模型,比较了计算辐射和不计辐射时叶片表面的温度值及温度分布的差异.计算表明对于1600 K这样的高温燃气,辐射热量不可忽略,考虑辐射热量后,叶片温度明显升高,温度分布也产生了显著差异.

A coupled flow-thermal model was established for 3D heat transfer of turbine blade with air cooling. Radiation heat was added into the energy equation as a source of heat radiation. Using coupled flow-thermal model,3-D conjugated heat transfer for turbine blade with air cooling was accomplished. And,heat radiation was solved with P-1 model. The different surface temperatures and temperature distributions of the blades with/without heat radiation was compared. The results show that, for high-temperature gas at 1 600 K, heat radiation is a significant heat source. If radiation heat is considered, the surface temperature of the blade is improved greatly, leading to obvious difference of temperature distribution.