论文部分内容阅读
提出了一种具有前缘自锁涡的新型气冷涡轮叶型.对新叶型流场进行了跨声速情况下的详细数值研究.观察了由前缘冷气喷射所形成的冷气旋涡沿叶型表面的变化.将新叶型的冷却效率、能量损失、压力场等与传统气冷涡轮叶型进行了对比.结果表明:新气冷叶型能够把由前缘冷气喷射形成的冷气旋涡锁定在其凹陷部位.冷气与主流的掺混损失减小.因此,前缘冷气喷射孔的列数可以减少.相应地,冷气喷射量可以减少.
A new air-cooled turbine blade with a self-locking eddy vortex is proposed. Numerical simulations of a new blade with a transonic speed are carried out. It is observed that the cold vortex formed by the front- The cooling efficiency, energy loss and pressure field of the new blade are compared with that of the conventional air-cooled turbine blade.The results show that the new air-cooled blade can lock the cooling vortex formed by the leading edge cooling jet at The concave portion of the cooling air is reduced from the mainstream mixing loss, and therefore, the number of the leading cooling air injection holes can be reduced, and accordingly, the cooling air injection amount can be reduced.