Simulation of corner separation control with ramp vortex generation

SHANG Dongran; LIU Yanming; JI Lucheng; ZHU Rong

doi:10.7638/kqdlxxb-2018.0197

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Simulation of corner separation control with ramp vortex generation

更新时间：2026-05-28

- Simulation of corner separation control with ramp vortex generation
- Vol. 38, Issue 6, Pages: 1083-1092(2020)
- 作者机构：
  
  北京理工大学,北京,100081
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2018.0197
  CLC： V231.3
- Published：2020
- 稿件说明：
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尚东然, 刘艳明, 季路成, 朱榕. 斜坡型涡流发生器控制叶栅角区分离的数值模拟[J]. 空气动力学学报, 2020, 38(6): 1083-1092.

SHANG Dongran, LIU Yanming, JI Lucheng, et al. Simulation of corner separation control with ramp vortex generation[J]. 2020, 38(6): 1083-1092.
尚东然, 刘艳明, 季路成, 朱榕. 斜坡型涡流发生器控制叶栅角区分离的数值模拟[J]. 空气动力学学报, 2020, 38(6): 1083-1092. DOI： 10.7638/kqdlxxb-2018.0197.

SHANG Dongran, LIU Yanming, JI Lucheng, et al. Simulation of corner separation control with ramp vortex generation[J]. 2020, 38(6): 1083-1092. DOI： 10.7638/kqdlxxb-2018.0197.

摘要

压气机平面叶栅端壁附面层的发展以及吸力面-端壁角区流动分离是造成压气机内部流动损失的重要原因。为了最大程度地减弱角区分离，改善叶栅气动性能，采用数值模拟方法对叶栅通道端壁上微尺度斜坡型涡流发生器进行了几何优化，分析了叶栅流场特性，同时进一步研究了涡流发生器对平面叶栅攻角特性的影响。结果表明：涡流发生器产生的流向涡与通道涡及端壁横向流动相互作用使得通道涡和端壁横向二次流发生偏转，抑制了通道涡向吸力面的发展，并将主流高能流体卷入角区，增加了角区流体动量，削弱了角区分离，使得叶栅出口处流场更加顺畅；涡流发生器的几何尺寸直接影响流向涡的强度；通过依次优化涡流发生器的高度和长宽比，最终确定涡流发生器的最优方案为

=4 mm、

=12 mm，该方案使得出口截面总压损失降低了7.82%；设计攻角下涡流发生器的作用效果最好，随着正负攻角的增加，损失降低程度下降，其中攻角为-8°和8°时，损失较原型分别下降了1.91%和5.29%。

Abstract

The development of end-wall boundary layer in compressor cascade and the corner separation between suction surface and end-wall are the important reasons for the loss of flow in compressor. In order to minimize the corner separation and improve the aerodynamic performance of the cascade

numerical investigation of compressor cascade with micro-ramp vortex generation(VG) placed inside of end-wall has been investigated. The cascade flow field characteristics are analyzed in detail. Furthermore

the influence of vortex generator on the angle of attack of cascade is studied. The results sho

w that

the ramp-VG placed inside of cascade can resist the crosswise flow

and the streamwise vortex generated by ramp VG can interact with the boundary layer in near end-wall region

resulting in limiting the development of passage vortex from pressure to suction side. Meanwhile streamwise vortex entrains high energy fluid to suction side corner region to increase momentum of corner fluid

making the flow field smoother at the outlet of the cascade. Furthermore

the intensity of streamwise vortex is influenced by both height and aspect ratio of the VG. The optimal scheme of the vortex generator is

=4 mm

=12 mm. This scheme reduces the total pressure loss at the outlet section by 7.82%. The vortex generator has the best effect under the design point

with the increase of the positive and negative angles of attack

the degree of loss reduction decreases. When the angle of attack is -8° and 8°

the loss is 1.91% and 5.29% lower than the prototype

respectively.

关键词

Keywords

references

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