合成射流后台阶分离流动控制的实验研究

李斌斌, 姚勇, 顾蕴松, 程克明

李斌斌, 姚勇, 顾蕴松, 程克明. 合成射流后台阶分离流动控制的实验研究[J]. 实验流体力学, 2016, 30(3): 53-60. DOI: 10.11729/syltlx20150137
引用本文: 李斌斌, 姚勇, 顾蕴松, 程克明. 合成射流后台阶分离流动控制的实验研究[J]. 实验流体力学, 2016, 30(3): 53-60. DOI: 10.11729/syltlx20150137
Li Binbin, Yao Yong, Gu Yunsong, Cheng Keming. Experimental investigation on separation flow control of backward facing step with synthetic j et[J]. Journal of Experiments in Fluid Mechanics, 2016, 30(3): 53-60. DOI: 10.11729/syltlx20150137
Citation: Li Binbin, Yao Yong, Gu Yunsong, Cheng Keming. Experimental investigation on separation flow control of backward facing step with synthetic j et[J]. Journal of Experiments in Fluid Mechanics, 2016, 30(3): 53-60. DOI: 10.11729/syltlx20150137

合成射流后台阶分离流动控制的实验研究

基金项目: 

空气动力学国家重点实验室基金

详细信息
  • 中图分类号: 11-5266/V

Experimental investigation on separation flow control of backward facing step with synthetic j et

  • 摘要: 具有边界层分离和再附的后台阶流动是工程中常见的一种复杂现象,研究后台阶绕流具有重要的理论意义和应用价值。后台阶流动包含了多种复杂的流动现象,如流动的转捩、分离、再附和非定常等流体力学基本问题。应用表面测压和粒子图像测速(PIV)对合成射流后台阶湍流分离流动控制进行了研究,通过分析后台阶壁面压力系数分布、瞬态旋涡流场结构以及时均流动结构,揭示了合成射流对后台阶再附点长度和回流区的分离流动控制机理。结果表明:在台阶前缘施加合成射流可有效减小回流区范围,回流区涡结构被施加的合成射流扰动“锁定”。在实验状态下,合成射流的动量系数越大,控制效果越好。从时均效果看,当合成射流的动量系数为0.771%时,可使再附点长度减小50%。
    Abstract: Backward facing step flow with boundary layer separation and reattachment is a common phenomenon in engineering.The research of backward facing step flow has important theoretical significance and practical value.Backward facing step flow contains a variety of com-plex fluid mechanics,such as flow transition,flow separation,reattachment and unsteady flow. It has important academic significance in the field of fluid mechanics.The test techniques of sur-face pressure and particle image velocimetry have been applied to investigate the backward facing step turbulent separated flow control with synthetic j et.Through analysis of the pressure coeffi-cient distributions of the step wall surface,transient vortex flow structure and time-averaged flow structure,it reveals the separation flow control mechanism of synthetic j et on the backward facing step reattachment length and recirculation zone.The results show that the synthetic j et imposed on the leading edge can effectively reduce the range of the recirculation zone,the vortex structure of which is locked by the synthetic j et perturbation.In this experiment,the greater the momentum coefficient of the synthetic j et is,the better the control effect becomes.The time-av-eraged effect is:when the momentum coefficient of the synthetic jet is 0.771%,the reattachment length can be decreased by 50%.
  • 期刊类型引用(2)

    1. 王泽阳,王建明,王怡菲. 基于等离子体合成射流的后台阶流动控制. 现代机械. 2022(06): 6-10 . 百度学术
    2. 苏轼鹏,曹小群,张大全,韦智元. 大型船舶空气尾流场防治新技术的数值模拟. 国防科技大学学报. 2020(04): 85-92 . 百度学术

    其他类型引用(5)

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  • 被引次数: 7
出版历程
  • 刊出日期:  2016-06-24

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