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采用数值模拟方法对利用吸力面小翼方式控制压气机叶栅间隙流动进行研究。结果表明,附加吸力面小翼可以降低叶顶泄漏流速,削弱泄漏涡强度,使得泄漏涡区损失降低。不同宽度吸力面小翼在不同间隙下部可以较好地减少叶尖泄漏,在叶顶间隙为3.3%叶高时,附加相对宽度为0.5的吸力面小翼可使损失降低4.7%。叶顶压差的降低及对泄漏涡结构的改变是吸力面小翼降低泄漏掺混损失的主要原因。
The numerical simulation method was used to study the control of compressor cascade clearance by means of suction winglets. The results show that the additional suction surface winglets can reduce the tip leakage velocity and weaken the leakage vortex strength, so that the leakage vortex loss decreases. The winglets with different widths can reduce the tip leakage better in the lower part of the gap. When the tip clearance is 3.3%, the winglets with the opposite width of 0.5 can reduce the loss by 4.7%. The decrease of tip pressure difference and the change of leakage vortex structure are the main reasons for the suction wing to reduce the leakage mixing loss.