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本文研究开缝修型对于圆柱绕流场变化以及涡流溢放频率的影响。基于FLUENT软件平台采用LES(大涡模拟)模拟开缝圆柱在5组雷诺数(Re=1500、3000、4400、5600、12000)及三种不同狭缝比(s/d=0.1、0.15、0.2)条件下的开缝圆柱尾涡周期变化。

朱睿*
( 厦门大学航空航天学院动力工程系; )
摘要: 本文研究开缝修型对于圆柱绕流场变化以及涡流溢放频率的影响。基于FLUENT软件平台采用LES(大涡模拟)模拟开缝圆柱在5组雷诺数(Re=1500、3000、4400、5600、12000)及三种不同狭缝比(s/d=0.1、0.15、0.2)条件下的开缝圆柱尾涡周期变化。通过流动显示实验分析研究开缝圆柱卡门涡的形成、发展及脱落过程。
关键词: 开缝圆柱;流场;尾涡;溢放频率
Zhu Rui*
( Aerospace Engineering School, Xiamen University; )
Abstract: The research focuses on the influence of modifications of slit-vent parameters on the flow field of a split-vent cylinder and the modulating effect on vortex shedding frequency. Based on the FLUENT software, the vortices conditions of three different wide aperture slit-vent cylinders (s/d=0.1, 0.15, 0.2) are studied and simulated under five different Reynolds conditions (Re=1500, 3000, 4400, 5600, 7200). A series of fluctuatingly oscillating vortices caused by cylinder boundary layer blowing and suction effect inside the slit-vent cylinder aperture are discovered through CFD (Computational Fluid Dynamics) analysis and simulation. The simulation results also achieve the wake flow vortices' shedding frequencies under different water tunnel speeds for the standard and split-vent cylinders.
Keywords: slit-vent cylinder; flow; vortex; shedding frequency
作者简介: Zhu Rui(1980-),Male,Assistant Professor,Main research:Experimental Fluid Mechanics
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