流体机械

2011, v.39;No.465(03) 10-17

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压气机转子叶片附面层抽吸的参数化研究
Parameterized Study of Bleeding Flow Control on the Blade Surface of Transonic Compressor Rotor

刘小民;高健;王星;
LIU Xiao-min,GAO Jian,WANG Xing (Xi'an Jiaotong University,Xi'an 710049,China)

摘要(Abstract):

通过数值求解三维粘性雷诺时均Navier-Stokes方程,详细研究了非设计工况下不同抽吸位置、抽吸流量和抽吸孔数目对跨音速压气机转子性能的影响,揭示了抽吸流与流动分离和激波结构的相互关系。研究结果表明:合理的抽吸能够有效控制激波的发生位置,改变流道中激波结构,延迟由于激波造成的流动分离。抽吸流量直接决定了压气机转子的性能,抽吸作用使得附面层内低能流体被移除,主流更加贴近叶片表面,从而增加了吸力面附近流体的动能,提高了流道内的通流能力,同时也能有效消除分离区内复杂的旋涡结构。
At off-design flow condition,the effects of bleeding position,bleeding rate and bleeding hole number on the performance of transonic compressor rotor are investigated numerically by solving three-dimensional viscous Reynolds-averaged Navier-Stokes equations.The flow separation and shockwave structure occurred on the blade suction surface with and without bleeding flow are also revealed.The studied results show that the reasonable distribution of bleeding flow can effectively control the shockwave position and change the shockwave structure.The flow separation caused by the shockwave in the flow passage is delayed.The bleeding rate determines directly the performance of transonic compressor rotor.Because of bleeding,low-energy fluid in the blade boundary layer is removed and the fluidic kinetic energy near the blade suction side is increased.The mainstream fluid with higher velocity is closed to the blade surface.Consequently,the flow capacity in the flow passage is improved.At the same time,the complicated negative flow vortex structure is suppressed or eliminated evidently.

关键词(KeyWords): 抽吸流;激波结构;分离流动;流动控制;数值模拟
bleeding flow;shockwave structure;separation flow;flow control;numerical simulation

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基金项目(Foundation): 陕西省自然科学基金资助项目(SJ08-ZT06)

作者(Author): 刘小民;高健;王星;
LIU Xiao-min,GAO Jian,WANG Xing (Xi'an Jiaotong University,Xi'an 710049,China)

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