The evolution of wandering motion and statistic characteristics of wingtip vortex in grid turbulence

WANG Zhiyuan; PAN Chong; CHENG Zepeng

doi:10.7638/kqdlxxb-2024.0011

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The evolution of wandering motion and statistic characteristics of wingtip vortex in grid turbulence

更新时间：2026-05-28

- The evolution of wandering motion and statistic characteristics of wingtip vortex in grid turbulence
- Vol. 43, Issue 1, Pages: 121-129(2025)
- 作者机构：
  
  1. 北京航空航天大学航空科学与工程学院,北京,100191
  2. 天目山实验室,杭州,310023
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2024.0011
  CLC： V211.3;O355
- Published：2025
- 稿件说明：
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王志远, 潘翀, 程泽鹏. 格栅湍流下翼尖涡摇摆运动及统计特性演化规律[J]. 空气动力学学报, 2025, 43(1): 121−129.

WANG Zhiyuan, PAN Chong, CHENG Zepeng. The evolution of wandering motion and statistic characteristics of wingtip vortex in grid turbulence[J]. 2025, 43(1): 121-129.
王志远, 潘翀, 程泽鹏. 格栅湍流下翼尖涡摇摆运动及统计特性演化规律[J]. 空气动力学学报, 2025, 43(1): 121−129. DOI： 10.7638/kqdlxxb-2024.0011

WANG Zhiyuan, PAN Chong, CHENG Zepeng. The evolution of wandering motion and statistic characteristics of wingtip vortex in grid turbulence[J]. 2025, 43(1): 121-129. DOI： 10.7638/kqdlxxb-2024.0011.

摘要

来流湍流度是影响翼尖涡不稳定运动及其发展演化行为的重要因素。本文在基于机翼弦长的雷诺数

= 1.1 × 10

条件下，通过时间解析的体视粒子图像测速技术测量了不同来流湍流度条件下孤立翼尖涡在不同流向站位处的速度场。结果表明，来流湍流度的增大显著增强了翼尖涡的不稳定摇摆运动，不同来流条件下翼尖涡摇摆运动幅值沿流向线性增长，并满足对来流脉动速度的统一标度规律。摇摆运动对翼尖涡统计量的计算有显著影响，通过系综平均方法修正摇摆运动对统计量测量结果的影响后进一步发现，在本实验测量的参数空间内不同来流条件下翼尖涡涡核半径满足相同的增长规律，翼尖涡沿流向的发展演化表现为黏性扩散为主导的衰减机制。

Abstract

Freestream turbulence significantly affects the unstable wandering motion and the evolution of the wingtip vortex. In the present study

time resolved-stereo particle image velocimetry (TR-SPIV) measurements were carried out under different freestream conditions at a chord-length-based Reynolds number of

= 1.1 × 10

. The results show that grid turbulence significantly enhances the wandering motion of the wingtip vortex. The wandering amplitude increases linearly along the streamwise direction and scales well with freestream velocity fluctuations. The ‘smeari

ng out’ effect of vortex wandering on the statistic characteristics is dramatic and can be corrected by the ensemble average method. Moreover

it is found that the core radius follows the same growth law under different flow configurations involved in the measured parameter space

indicating that the evolution of the wingtip vortex along the streamwise direction is dominated by viscous diffusion.

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Keywords

references

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