航空学报 > 2014, Vol. 35 Issue (11): 3000-3011   doi: 10.7527/S1000-6893.2014.0015

边界层吸气对压气机叶栅角区分离损失的控制

陈萍萍1,2, 乔渭阳1, Karsten LIESNER2, Robert MEYER2   

  1. 1. 西北工业大学 动力与能源学院, 陕西 西安 710072;
    2. 德国航空航天中心 推进技术研究所, 柏林 10623
  • 收稿日期:2013-11-25 修回日期:2014-03-06 出版日期:2014-11-25 发布日期:2014-04-08
  • 通讯作者: 乔渭阳,Tel.: 029-88492195 E-mail: qiaowy@nwpu.edu.cn E-mail:qiaowy@nwpu.edu.cn
  • 作者简介:陈萍萍 女, 博士研究生.主要研究方向: 叶轮机械气动热力学, 流动控制技术. E-mail: moshoumm@163.com; 乔渭阳 男, 教授, 博士生导师.主要研究方向: 叶轮机械气动热力学, 气动声学, 流动控制技术. Tel: 029-88492195 E-mail: qiaowy@nwpu.edu.cn; Karsten Liesner 男, 博士研究生.主要研究方向: 流体机械试验测量, 流动控制. E-mail: Karsten.Liesner@dlr.de; Robert Meyer 男, 博士, 高级工程师.主要研究方向: 叶轮机械气动热力学, 流体机械试验测量, 流动控制. E-mail: Robert.Meyer@dlr.de

Boundary Layer Suction on Hub-corner Separation Loss in a Linear Compressor Cascade

CHEN Pingping1,2, QIAO Weiyang1, Karsten LIESNER2, Robert MEYER2   

  1. 1. School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China;
    2. Institute of Propulsion Technology, German Aerospace Center(DLR), Berlin 10623, Germany
  • Received:2013-11-25 Revised:2014-03-06 Online:2014-11-25 Published:2014-04-08

摘要:

压气机角区的大范围回流通常会引起叶片通道中的三维阻塞现象,并伴随有强烈的掺混流动损失.采用德国航空航天中心(DLR)开发的TRACE程序,在其推进技术研究所的高速压气机叶栅试验台(包含5个NACA65 K48直叶片)上,研究了位于端壁上的边界层吸气措施——叶片弦中近尾缘吸气槽(MTE)对该直压气机叶栅通道的角区分离进行控制,减小二次流动损失,进而削弱其对总损失的影响.通过基于定常雷诺平均Navier-Stokes(RANS)方法的数值模拟研究与相应的试验研究对比,端壁边界层吸气能够较好地重新组织角区气流流动,减弱附着于叶片吸力面尾缘的集中脱落涡,使得角区分离涡强度显著降低,由此引起的二次流损失也明显降低,与无吸气状态相比最大降幅可达81.2%;在设计状态下采用吸气流量率为1%的MTE,总压损失有很大程度的降低:在数值计算中,降幅为15.2%;试验测量中为9.7%.

关键词: 压气机角区分离, 端壁边界层吸气, 叶片弦中近尾缘吸气槽, 高速压气机叶栅试验台, 总压损失

Abstract:

The large reverse flow in the compressor hub-corner region usually leads to three-dimensional blockage in the blade passage, accompanied by a strong mixing flow loss. With TRACE code (developed by German Aerospace Center (DLR)), the endwall boundary layer suction with MTE (Middle suction slot near the Trailing Edge) is applied numerically to a high-speed compressor linear cascade test rig consisting of five NACA65 K48 profiles in the DLR Institute of Propulsion Technology to dismiss the effect of corner separation, to decrease the secondary flow and thus to reduce its influence on the total pressure loss. The detailed flow phenomena are revealed by the steady Reynolds-averaged Navier-Stokes (RANS) investigations with experimental validation at the design operating condition. The results show that MTE at the endwall close to the suction surface can effectively reorganize the corner flow, reduce the concentrated shed vortex attached to the trailing edge of the blade suction surface and thus decrease the corner vortex intensity significantly. Consequently, the related secondary flow loss is reduced essentially, the maximum being up to 81.2% compared to the no suction case. Under the design operating condition, by using of MTE suction slot, the total pressure loss is obviously decreased by about 15.2% in CFD calculation and 9.7% in the test.

Key words: compressor corner separation, endwall boundary layer suction, MTE, high-speed compressor linear cascade test rig, total pressure loss

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