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王家禄, 张兆顺, 曾兴. 纵向涡对近壁湍流结构的影响[J]. 力学学报, 1994, 26(5): 625-630. DOI: 10.6052/0459-1879-1994-5-1995-589
引用本文: 王家禄, 张兆顺, 曾兴. 纵向涡对近壁湍流结构的影响[J]. 力学学报, 1994, 26(5): 625-630. DOI: 10.6052/0459-1879-1994-5-1995-589
EFFECT OF LONGITUDINAL VORIICES ON THE TURBULENT STRUCTURE IN NEAR-WALL REGION[J]. Chinese Journal of Theoretical and Applied Mechanics, 1994, 26(5): 625-630. DOI: 10.6052/0459-1879-1994-5-1995-589
Citation: EFFECT OF LONGITUDINAL VORIICES ON THE TURBULENT STRUCTURE IN NEAR-WALL REGION[J]. Chinese Journal of Theoretical and Applied Mechanics, 1994, 26(5): 625-630. DOI: 10.6052/0459-1879-1994-5-1995-589

纵向涡对近壁湍流结构的影响

EFFECT OF LONGITUDINAL VORIICES ON THE TURBULENT STRUCTURE IN NEAR-WALL REGION

  • 摘要: 在封闭水槽中用氢气泡方法观察了纵向涡对近壁湍流结构的影响,涡的下洗侧出现了展向距离较宽、流动较稳定的快斑区,流向速度快;涡的上洗侧出现了含有慢斑的区域,流动结构复杂,流向速度慢,纵向涡使下洗侧速度较快的流体流向壁面,使上洗侧速度较慢的流体远离壁面。

     

    Abstract: The effect of longitudinal vortices on the turbulent structure of near-wall regionWas investigated with hydrogen bubble technique in a rectangular duct A wider high-speedstreak appears in the downwash region of vortex(where secondary flow is directed towardsthe wall),the flow is stable and the streamwise velocity is higher inside the streak)a regionincluding low-speed streaks is shown in the upwash part of vortex (where the secondaryflow is directed away from the wall),the flow structure is complicated and ...

     

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