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基于层析PIV的椭圆水翼近尾迹梢涡实验研究

赵航 佘文轩 高琪 邵雪明

赵航,佘文轩,高琪,等. 基于层析PIV的椭圆水翼近尾迹梢涡实验研究[J]. 实验流体力学,2022,36(2):82-91 doi: 10.11729/syltlx20210108
引用本文: 赵航,佘文轩,高琪,等. 基于层析PIV的椭圆水翼近尾迹梢涡实验研究[J]. 实验流体力学,2022,36(2):82-91 doi: 10.11729/syltlx20210108
ZHAO H,SHE W X,GAO Q,et al. TPIV study for near-field tip vortex from an elliptical hydrofoil[J]. Journal of Experiments in Fluid Mechanics, 2022,36(2):82-91. doi: 10.11729/syltlx20210108
Citation: ZHAO H,SHE W X,GAO Q,et al. TPIV study for near-field tip vortex from an elliptical hydrofoil[J]. Journal of Experiments in Fluid Mechanics, 2022,36(2):82-91. doi: 10.11729/syltlx20210108

基于层析PIV的椭圆水翼近尾迹梢涡实验研究

doi: 10.11729/syltlx20210108
基金项目: 国家自然科学基金(91852204);国家重点研发计划资助(2020YFA0405700)
详细信息
    作者简介:

    赵航:(1994—),男,湖南安乡人,博士研究生。研究方向:实验流体力学流动测量。通信地址:浙江省杭州市西湖区浙江大学玉泉校区航空航天学院(310027)。E-mail:hangzhao@zju.edu.cn

    通讯作者:

    E-mail:qigao@zju.edu.cn

  • 中图分类号: O352

TPIV study for near-field tip vortex from an elliptical hydrofoil

  • 摘要: 梢涡空化作为一种常见的空化现象,广泛存在于水力机械及船舶推进领域。梢涡空化初生与桨叶梢部的旋涡流动密切相关,因此有必要深入研究梢涡流场,揭示其流动特征与空化的内在联系。基于高时间解析度的层析PIV技术,在高速空泡水洞中对椭圆水翼的近尾迹梢涡流场开展了实验研究。结果表明:梢涡在近尾迹区域内存在明显的摆动现象,未考虑旋涡摆动的时间平均会在时均流场中引入额外的误差,因此在梢涡特性的定量研究中有必要滤除旋涡摆动的影响;在水翼脱落剪切层的作用下,涡核中心两侧的切向速度分布明显不对称,且在剪切层与涡核之间存在高速轴向流动区域;梢涡流场中的湍流脉动能量主要集中在涡核内部,且由法向、展向速度脉动主导。结合前人研究,发现法向、展向速度脉动是涡核内部湍流压力脉动的主要来源。
  • 图  1  椭圆水翼

    Figure  1.  Elliptical hydrofoil

    图  2  实验布置示意图

    Figure  2.  Schematic of the experimental setup

    图  3  摆动滤除前后的时均涡流场

    Figure  3.  Time-averaged flow field before and after vortex wandering correction

    图  4  近尾迹区域内涡核中心运动轨迹

    Figure  4.  Trajectory of the tip vortex core center in the near field

    图  5  近尾迹区域内梢涡摆动幅度

    Figure  5.  Amplitude of the vortex wandering in the near field

    图  6  旋涡摆动滤除前后时均速度场,α = 10°

    Figure  6.  Time-averaged velocity field before and after vortex wandering correction, α = 10°

    图  7  三维瞬时梢涡流场结构

    Figure  7.  Three-dimensional instantaneous tip vortex structure

    图  8  时均轴向速度三维分布

    Figure  8.  Three-dimensional distribution of time-averaged axial velocity

    图  9  时均轴向涡量及轴向速度云图,α = 10°

    Figure  9.  Contour of time-averaged axial vorticity and velocity, α = 10°

    图  10  梢涡时均切向速度分布,α = 10°

    Figure  10.  Distribution of time-averaged circumferential velocity, α = 10°

    图  11  湍动能云图,α = 10°

    Figure  11.  Contour of turbulence kinetic energy, α = 10°

    图  12  旋涡摆动滤除前后的法向湍动能分布,α = 10°

    Figure  12.  Distribution of turbulence kinetic energy along y axis before and after vortex wandering correction, α = 10°

    图  13  不同流向位置涡核中心各速度分量脉动强度

    Figure  13.  Velocity fluctuation in the core center at different streamwise position

    图  14  梢涡空化的不同类型

    Figure  14.  Different type of tip vortex cavitation

    表  1  涡核中心各速度分量脉动对湍动能的贡献

    Table  1.   The contribution of each velocity component fluctuation to TKE in the core center

    α/(° )Rec0.5u' 2U–2k–10.5v' 2U–2k–10.5w' 2U–2k–1
    52.48×1057.6%40.4%52.0%
    4.70×1055.7%41.6%52.7%
    102.48×10510.3%40.6%49.1%
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-08-26
  • 修回日期:  2021-11-30
  • 录用日期:  2021-12-02
  • 网络出版日期:  2022-05-26
  • 刊出日期:  2022-05-19

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