涡发生器控制平板边界层分离的大涡模拟

胡昊; 李新凯; 戴丽萍; 王晓东; 康顺

doi:10.13224/j.cnki.jasp.2016.02.030

涡发生器控制平板边界层分离的大涡模拟

doi: 10.13224/j.cnki.jasp.2016.02.030

胡昊^1,2,
李新凯¹,
戴丽萍¹,
王晓东¹,
康顺^1,3

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

基金项目:

国家自然科学基金(51176046)

中央高校基金项目(JB2015193)

详细信息

作者简介:
胡昊(1979-),男,河南南阳人,博士生,主要从事风力机流动控制及气动噪声方面研究.

中图分类号: V232;TK83
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出版历程
- 收稿日期: 2015-02-10
- 刊出日期: 2016-02-28

Vortex generators control flat boundary layer separation of large eddy simulation

1. Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education, School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;
2. School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;
3. Xi'an Modern Control Technology Research Institute, China North Industries Group Corporation, Xi'an 710065, China

摘要

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5,7,9,11.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%.
- 涡发生器 /
- 边界层分离 /
- 大涡模拟 /
- 流动控制 /
- 相干结构
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, 7, 9, 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, 11, 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%.
- vortex generators /
- boundary layer separation /
- large eddy simulation(LES) /
- flow control /
- coherent structure

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