| 49 | 1 | 304 |
| 下载次数 | 被引频次 | 阅读次数 |
引用小窄条控制件对不同旋涡脱落模式进行尾流控制.在振幅比A/D=1.0,无量纲振荡频率feD/V∞=0.413,雷诺数为1 200条件下找到了2P旋涡脱落模式并对其进行控制;在振幅比为0.4,无量纲振荡频率0.21条件下找到了2S旋涡脱落模式并对其进行控制;在振幅比为1.5,无量纲振荡频率0.189条件下找到了P+S旋涡脱落模式并对其进行控制.烟线流动显示实验和热线测速.实验结果表明,单窄条对2S模式旋涡脱落的抑制作用不明显,对2P模式旋涡脱落抑制作用显著,双窄条对P+S模式旋涡脱落的抑制在一定位置下有显著控制效果.
Abstract：A small strip was used to control wake vortices in different vortex shedding modes.The 2Pvortex shedding mode was amplitude ratio A/D=1.0,non-dimensional oscillation frequencies feD/V∞=0.413,and Reynolds number 1 200.The 2Svortex shedding mode was amplitude ratio=0.4,non-dimensional oscillation frequencies of 0.21,and was controlled by a stationary narrow strip.The P+S vortex shedding mode was amplitude ratio=1.5,non-dimensional oscillation frequencies=0.189,and was controlled by a stationary narrow strip.The results of flow visualization and velocity fluctuation measurement show that single narrow strip has no effect on inhibiting 2Smode vortex shedding but has significant inhibitory effect on 2Pmode vortex shedding.Similarly,the suppression of vortex shedding in the P+S mode is significantly controlled by the double strips in a certain position.
[1] WILLIAMSON C H K,GOVARDHAN R.Vortex-induced vibration[J].Annual Review of Fluid Mechanics,2004,36:413-455.
[2] ROSHKO A.Perspectives on bluff body aerodynamics[J].Journal of Wind Engineering and Industrial Aerodynamics,1993,49(1):79-100.
[3] YOU D,CHOI H,CHOI M R,et al.Control of flow induced noise behind a circular cylinder using splitter plates[J].AIAA Journal,1998,36(11):1961-1967.
[4] SARPKAYA T.Vortex-induced oscillations:a selective review[J].Journal of Applied Mechanics,1979,46(2):241-258.
[5] WILLIAMSON C H K,GOVARDHAN R.Vortex-induced vibrations[J].Annual Review of Flurd Mechanics,2004,36:413-455.
[6] WILLIAMSON C H K,ROSHKO A.Vortex formation in the wake of an oscillating cylinder[J].Journal of Fluids and Structures,1988,2(4):355-381.
[7] BEARMAN P W.Investigation of the flow behind a two-dimensional model with a blunt trailing edge and fitted with splitter plates[J].Journal of Fluid Mechanics,1965,41(2):241-255.
[8] ROSHKO A.Perspectives on bluff body aerodynamics[J].Journal of Wind Engineering and Industrial Aerodynamics,1993,49(1-3):79-100.
[9] DOOLAN C J.Flat plate interaction with the near wake of a square cylinder[J].AIAA Journal,2009,47(2):475-479.
[10] SCHUMM M,BERGER E,MONKEWITZ P.Self-excited oscillations in the wake of two-dimensional bluff bodies and their control[J].Journal of Fluid Mechanics,1994,271:17-53.
基本信息:
DOI：
中图分类号:O357.5
引用信息:
[1]金华斌,邵传平.大振幅横向振荡柱体尾流的控制[J],2016,27(04):377-381+388.
基金信息: