涡轮叶片尾缘新型结构的换热与流阻

为了提高涡轮叶片的耐温能力，针对涡轮叶片尾缘内冷复合通道提出两种新的隔板结构。通过实验研究了新结构与传统隔板结构对通道的换热和压力损失的规律。采用薄膜加热片作为加热器提供等热流边界条件。实验结果表明：新的隔板结构的设计可以明显增强通道换热的均匀性，其中带孔直隔板提高换热均匀性的同时，部分区域的局部换热能力有所下降，同时压力损失也有所降低；而对于波形隔板结构，部分区域的局部换热能力也有所下降，但平均换热增大。该结构在对换热进行改进的同时，也伴随着压力损失有所增大。实验结论可为大型发动机涡轮叶片的内部冷却结构优化设计提供基础依据。

Heat Transfer and Pressure Drop in Novel Configuration of Turbine Blade Trailing Edge

An experimental study was performed to obtain heat transfer and pressure drop characteristics in a typical traditional and two improved turbine blade cooling configurations.A thin film was used as heater to supply the equal heat flux boundary condition.It was found that the two novel configurations can improve the uniformity of heat transfer greatly.The channel with improved straight divider wall shows a lower local heat transfer distribution on the endwall and a lower pressure drop than the passage with tr...