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采用数值模拟方法对利用不同安装方式叶尖小翼控制压气机叶栅间隙流动进行研究。结果表明,不同安装方式叶尖小翼都可以有效降低叶顶泄漏流速,削弱泄漏涡强度。叶尖小翼改变了叶尖负荷及泄漏涡运行轨迹,进而影响了叶尖流场不同涡系之间的相互作用。吸力面小翼削弱了泄漏涡,抑制了通道涡的发展,使得叶栅总损失降低。压力面小翼及组合小翼削弱了泄漏涡,但增强了通道涡及其与泄漏涡之间的相互作用,叶栅总损失增加。
The numerical simulation method was used to study the clearance flow control of the compressor cascade by using different tips of the tip winglets. The results show that the tip winglets with different installation methods can effectively reduce the leakage velocity at the tip of the blade and weaken the leakage vortex strength. The tip winglets changed the tip load and the trajectory of the leakage vortex, which in turn affected the interaction between different vortex lines in the tip flow field. The suction surface winglets weaken the leakage vortex and suppress the development of the channel vortex, resulting in the reduction of total loss of the cascade. The pressure surface winglets and the combination winglets weaken the leakage vortices, but enhance the channel vortices and their interactions with the leakage vortices, resulting in an increase in total cascade losses.