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减阻工况下壁面周期扰动对湍流边界层多尺度的影响

王帅杰 崔晓通 白建侠 唐湛棋 姜楠

王帅杰, 崔晓通, 白建侠, 唐湛棋, 姜楠. 减阻工况下壁面周期扰动对湍流边界层多尺度的影响[J]. 力学学报, 2019, 51(3): 767-774. doi: 10.6052/0459-1879-18-409
引用本文: 王帅杰, 崔晓通, 白建侠, 唐湛棋, 姜楠. 减阻工况下壁面周期扰动对湍流边界层多尺度的影响[J]. 力学学报, 2019, 51(3): 767-774. doi: 10.6052/0459-1879-18-409
Shuaijie Wang, Xiaotong Cui, Jianxia Bai, Zhanqi Tang, Nan Jiang. THE EFFECT OF PERIODIC PERTURBATION ON MULTI SCALES IN A TURBULENT BOUNDARY LAYER FLOW UNDER DRAG REDUCTION[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(3): 767-774. doi: 10.6052/0459-1879-18-409
Citation: Shuaijie Wang, Xiaotong Cui, Jianxia Bai, Zhanqi Tang, Nan Jiang. THE EFFECT OF PERIODIC PERTURBATION ON MULTI SCALES IN A TURBULENT BOUNDARY LAYER FLOW UNDER DRAG REDUCTION[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(3): 767-774. doi: 10.6052/0459-1879-18-409

减阻工况下壁面周期扰动对湍流边界层多尺度的影响

doi: 10.6052/0459-1879-18-409
基金项目: 1) 国家自然科学基金(11732010,11572221,11872272,U1633109,11802195)和国家重点研发计划(2018YFC0705300)资助项目.
详细信息
    通讯作者:

    姜楠

  • 中图分类号: O357.5;

THE EFFECT OF PERIODIC PERTURBATION ON MULTI SCALES IN A TURBULENT BOUNDARY LAYER FLOW UNDER DRAG REDUCTION

  • 摘要: 通过在平板壁面施加不同频率振幅的压电陶瓷振子周期性扰动,进行了湍流边界层主动控制减阻的实验研究.在压电陶瓷振子最大减阻工况下(80 V和160Hz),使用单丝边界层探针对压电振子自由端下游2mm处进行测量,得到不同法向位置流向速度信号的时间序列.通过对比施加控制前后的多尺度分析,发现压电振子产生的扰动只对近壁区产生影响,使得近壁区大尺度脉动降低,小尺度脉动强度增大,而对边界层的外区则基本没有影响.进一步对大尺度和小尺度的脉动信号进行条件平均,发现压电振子产生的扰动对小尺度脉动的影响在时间相位上并不均匀,小尺度脉动强度在大尺度脉动为正时比在大尺度脉动为负时具有更明显的增加.这表明壁面周期扰动主要通过使大尺度高速扫掠流体破碎为小尺度结构,来影响相应的高壁面摩擦事件,从而达到减阻效果.

     

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出版历程
  • 收稿日期:  2018-12-04
  • 刊出日期:  2019-05-18

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