为了详细设计涡轮动叶冷却结构,采用内流三维流场计算对内部的流动细节进行设计,并将全三维气热耦合计算作为冷却结构最终方案的详细设计。计算结果表明,当调整第三腔隔板倾斜时,可以有效地控制第三腔流动,降低第三腔位置的高温;由于第二腔根部冷气流动雷诺数较低,导致第二腔温度较高。通过将肋形式由60°平行肋改为60V型肋能够将最大温度降低10K。三维云图以及流线图可以看出,高温区随着结构的改变而改变。
For a detailed design of the rotor blades cooling structure, the internal flow three-dimensional flow field calculation was used to design the flow details and full three-dimensional Aero-thermal conjugated calculation was accepted as the detailed design scheme of the final solution of cooling structure. The results show that when baffle of the third chamber is inclined, it could control the flow and reduce the high temperature of the third chamber effectively. Meanwhile, the cold air flow Reynolds number at root of the second chamber is low, which results in a higher temperature in the second chamber. By changing the parallel ribs of 60 degrees to 60V type, the maximum temperature can be reduced 10K. Three-dimensional contours and the streamlines show that the high temperature zone changes with different structures.