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为设计一套适用于燃气轮机第1级涡轮导叶的高效冷却结构,将一套涡轮传热设计方案应用于涡轮导叶冷却结构设计中,数值模拟结果表明:中后部冲击射流能够有效冲刷叶片内表面,降低了叶片吸力侧中部壁面温度,同时形成较大漩涡结构降低压力侧中部的壁面温度;通过设计,得出冷却结构最大外壁面无量纲温度为0.849,冷却效率为0.651,设计目标冷却气体的流量为127 g/s,实际流量93 g/s;采用该设计流程能够有效降低冷却结构设计的盲目性,使冷却结构设计更加灵活方便。
In order to design an efficient cooling structure suitable for the first stage turbine guide vane of a gas turbine, a set of turbine heat transfer design scheme is applied to the cooling structure design of the turbine guide vane. The numerical simulation results show that the middle and back impact jet can effectively scrub the blade The inner surface of the cooling structure reduces the temperature of the central wall at the suction side of the blade and forms a larger vortex structure to lower the temperature of the wall at the middle of the pressure side. The flow rate of gas is 127 g / s and the actual flow rate is 93 g / s. The design process can effectively reduce the blindness of the cooling structure design and make the cooling structure design more flexible and convenient.