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将流体网络方法应用于高性能涡轮叶片复合冷却结构的设计中,开发了气热耦合数值计算方法,并对其进行了可靠性验证.对采用复合冷却方式的某型高压动叶内部冷却结构进行基于流体网络分析的快速预测,评估其气动与传热特性.针对网络分析结果,提出3种改进措施,即调整不同冷却通道冷却气体流量、减小通道转弯结构流阻、以及调整局部高温区的内冷几何结构.通过全三维燃气-固体叶片-冷却气流耦合计算验证,指出改型设计降低了叶片表面最高温度,整体温度分布更加均匀,冷气入口参数匹配合理.结果表明,计算方法大大缩短了涡轮叶片复杂冷却结构的设计周期.
The fluid network method is applied to the design of high-performance turbine blade composite cooling structure, numerical calculation method of gas-heat coupling is developed, and its reliability is verified.On the internal cooling structure of a high-pressure moving blade with composite cooling method Based on the rapid prediction of fluid network analysis, the aerodynamic and heat transfer characteristics were evaluated.According to the network analysis results, three improvement measures were proposed, that is, adjusting the cooling gas flow rate of different cooling channels, reducing the flow resistance of the turn structure and adjusting the local high temperature region The results show that the design method can reduce the maximum temperature of the blade surface, the overall temperature distribution is more uniform and the parameters of the cooling air inlet match reasonably.The results show that the calculation method is greatly shortened Turbine Blade Complex Cooling Structure Design Cycle.