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

School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China

摘要: 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.
- 航空、航天推进系统 /
- 热-流耦合方法 /
- 气冷涡轮叶片 /
- 耦合换热 /
- 辐射
Abstract: 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.
- aerospace propulsion system /
- coupled flow-thermal method /
- turbine blade with air cooling /
- conjugate heat transfer /
- radiation

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