空气动力学学报2025，Vol.43Issue(1)：121-129,9.DOI:10.7638/kqdlxxb-2024.0011
格栅湍流下翼尖涡摇摆运动及统计特性演化规律
The evolution of wandering motion and statistic characteristics of wingtip vortex in grid turbulence
摘要
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 Rec=1.1×104.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'smearing 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.关键词
翼尖涡/湍流度/摇摆运动/统计特性/体视粒子图像测速Key words
wingtip vortex/turbulence intensity/vortex wandering/statistic characteristics/SPIV引用本文复制引用
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):121-129,9.基金项目
国家自然科学基金(12202031,12225202,91952302) （12202031,12225202,91952302）
天目山实验室基金(TK2023-B-004) （TK2023-B-004）
