Vortex generators control flat boundary layer separation of large eddy simulation

HU Hao; LI Xin-kai; DAI Li-ping; WANG Xiao-dong; KANG Shun

doi:10.13224/j.cnki.jasp.2016.02.030

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Vortex generators control flat boundary layer separation of large eddy simulation

更新时间：2026-07-07

- Vortex generators control flat boundary layer separation of large eddy simulation
- Vol. 31, Issue 2, Pages: 493-502(2016)
- 作者机构：
  
  1. 华北电力大学能源动力与机械工程学院电站设备状态监测与控制教育部重点实验室,北京,102206
  2. 华北水利水电大学电力学院,郑州,450045
  3. 中国兵器工业集团公司西安现代控制技术研究所,西安,710065
- 作者简介：
- 基金信息：
- DOI：10.13224/j.cnki.jasp.2016.02.030
  CLC：
- Published：2016
- 稿件说明：
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胡昊, 李新凯, 戴丽萍, 王晓东, 康顺. 涡发生器控制平板边界层分离的大涡模拟[J]. 航空动力学报, 2016, 31(2): 493-502.

doi: 10.13224/j.cnki.jasp.2016.02.030
胡昊, 李新凯, 戴丽萍, 王晓东, 康顺. 涡发生器控制平板边界层分离的大涡模拟[J]. 航空动力学报, 2016, 31(2): 493-502. DOI： 10.13224/j.cnki.jasp.2016.02.030.

doi: 10.13224/j.cnki.jasp.2016.02.030 DOI：

摘要

为了研究涡发生器(VGs)间距λ对控制边界层分离效果的影响

选取了4种涡发生器间距

λ/H(H为涡发生器高度)分别为5

11.采用大涡模拟(LES)方法对带逆压梯度的平板边界层分离流动及VGs控制分离流动进行了数值模拟.分析了有无VGs控制时

湍流场中大尺度相干结构及其演化规律

分别从旋涡间距、边界层内流体动能、压差损失等方面考察了VGs间距对控制流动分离效果的影响.研究结果表明当λ/H为5时

VGs间距过小抑制了旋涡的展向发展

λ/H为9

11时

VGs间距过大边界层内流体动能偏低

当间距λ/H为7时流动控制效果更优

此时计算域压差损失最小

相比较无VGs控制时

压差损失降低了30.95%.

Abstract

In order to study the effect of spacing λ of vortex generators(VGs) on the control boundary layer separation

4 kinds of vortex generators spacing were selected

and λ/H(H is the height of vortex generators) respectively were 5

11. The boundary layer separation flow of adverse pressure gradient and VGs control flow separation were simulated by large eddy simulation(LES) method. The evolution of the large scale coherent structure in turbulent flow field were analyzed with and without VGs control

and the influence of VGs spacing on the flow separation control effect were investigated from vortex spacing

fluid kinetic energy in the boundary layer

loss of pressure difference

etc. The research results show that when λ/H is 5

the spacing of VGs is too small

so that the spanwise development of vortex are suppressed

when λ/H are 9

the spacing of VGs is too large lead to the fluid kinetic energy in the boundary layer is too low

when the spacing of VGs is λ/H is 7

the effect of flow control is better

then the pressure loss of calculation domain is minimum

compared with no VGs control

pressure loss is reduced by 30.95%.

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