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对可控扩散叶型(CDA)环形叶栅和4种具有不同长度和流向位置的端壁翼刀叶栅内的三维黏性流场进行了数值模拟。结果表明:较长翼刀对气流横向流动的阻断作用较强,较短翼刀产生的附加损失较小;加装翼刀后叶栅中部气流流动状况显著改善,但端壁附近损失有所增加;翼刀加装在流道前部比后部更有利于降低总能量损失,占据前1/2流道的翼刀方案为本文最佳翼刀方案,使叶栅总能量损失比原型叶栅低2.2%。
The three-dimensional viscous flow field in cascades of controllable diffuser (CDA) annular cascades and four kinds of endwall blade cascades with different length and flow direction are numerically simulated. The results show that the long blade has strong blocking effect on the lateral flow and the additional loss caused by the short blade is small. The airflow in the middle part of the cascade is significantly improved after the blade is installed, but the loss near the end wall Increase; wing knife installation in the front of the runner is more conducive to reduce the total energy loss than the rear, occupy the first half of the flow path of the wing knife program for the best wing knife program so that the total energy loss cascade than the prototype leaves Grid low 2.2%.