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

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 1600 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.