表面粗糙度对圆柱体涡激振动响应特性影响数值研究
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摘要
使用数值模拟方法,研究了粗糙度对圆柱体涡激振动响应特性的影响,对不同粗糙度下圆柱体的涡激振动响应幅值、漩涡泄放频率、结构振动频率、锁定区间等参数进行了对比分析。分析结果表明:依据涡激振动响应幅值以及响应频率,可以将整个折合速度区间划分为4个区间:区间I、区间II、区间III以及区间IV。随着粗糙度的上升,圆柱体涡激振动响应最大值呈下降趋势。随着粗糙度的上升,锁定区域开始点呈缓慢提前的趋势,而锁定区域结束点则呈快速提前的趋势,因此整个锁定区域宽度会随着粗糙度的上升而逐渐变窄。
Effects of surface roughness on vortex-induced vibration( VIV) characteristics of a circular cylinder were studied numerically. The cylinder's VIV response amplitude,vortex-shedding frequency,structural vibration frequency and lock-in region under different surface roughnesses were analyzed contrastively. The numerical results showed that the whole reduced velocity interval can be divided into four regions including region I,region II,region III and region IV based on the cylinder's VIV response amplitude and frequency; with increase in roughness,the maximum value of the cylinder's VIV drops,the beginning point of the lock-in region slowly shifts to an earlier position while the lock-in region's ending point quickly shifts an earlier one,the width of the lock-in region becomes gradually narrower.
Effects of surface roughness on vortex-induced vibration( VIV) characteristics of a circular cylinder were studied numerically. The cylinder's VIV response amplitude,vortex-shedding frequency,structural vibration frequency and lock-in region under different surface roughnesses were analyzed contrastively. The numerical results showed that the whole reduced velocity interval can be divided into four regions including region I,region II,region III and region IV based on the cylinder's VIV response amplitude and frequency; with increase in roughness,the maximum value of the cylinder's VIV drops,the beginning point of the lock-in region slowly shifts to an earlier position while the lock-in region's ending point quickly shifts an earlier one,the width of the lock-in region becomes gradually narrower.
引文
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[4]ACHENBACH E,HEINECKE A.On vortex shedding from smooth and rough cylinders in the range of Reyonlds numbers6×103to 5×106[J].Journal of Fluid Mechanics,1981,109:239-251.
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[22]JAUVTIS N,WILLIAMSON C H K.The effect of two degrees of freedom on vortex-induced vibration at low mass and damping[J].Journal of Fluid Mechanics,2004,59:23-62.
[23]ZHAO M,KAJA K,XIANG Y,et al.Vortex-induced vibration(VIV)of a circular cylinder in combined steady and oscillatory flow[J].Ocean Engineering,2013,73:83-95.
[24]FENG C.The measurement of Vortex-induced effects in flow past a stationary and oscillating circular and D-section cylinders[D].Vancouver:University of British Columbia,1968.
[25]SUMER B M,FREDSE J.Hydrodynamics around cylindrical structures[J].Singapore:World Scientific,1997:26.
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[27]KHALAK A,WILLIAMSON C H K.Fluid forces and dynamics of a hydroelastic structure with very low mass and damping[J].Journal of Fluids and Structures,1997,11(8):973-982.
[28]KHALAK A,WILLIAMSON C H K.Motions,forces and motion transitions in vortex-induced vibration at low massdamping[J].Journal of Fluids and Structures,1999,13:813-851.
[29]SARPKAYA T.Fluid forces on oscillating cylinders[J].Nasa Sti/recon Technical Report A,1979,104(3):275-290.
[30]ARONSEN K H.An experimental investigation of in-line and combined in-line and cross-flow vortex induced vibrations[D].Trondheim:NTNU,2007.
[2]杨林.非线性流固耦合问题的数值模拟方法研究[D].青岛:中国海洋大学,2011.
[3]ACHENBACH E.Influence of surface roughness on the crossflow around a circular cylinder[J].Journal of Fluid Mechanics,1971,46(2):321-335.
[4]ACHENBACH E,HEINECKE A.On vortex shedding from smooth and rough cylinders in the range of Reyonlds numbers6×103to 5×106[J].Journal of Fluid Mechanics,1981,109:239-251.
[5]NAKAMURA Y,TOMONARI Y.The effect of surface roughness on the flow past circular cylinders at high Reynolds numbers[J].Journal of Fluid Mechanics,1982,123:363-378.
[6]RIBEIRO L J D.Effects of surface roughness on the twodimensional flow past circular cylinders I:mean forces and pressures[J].Journal of Wind Engineering and Industrial Aerodynamics,1991,37(3):299-309.
[7]RIBEIRO L J D.Effects of surface roughness on the twodimensional flow past circular cylinders II:fluctuating forces and pressures[J].Journal of Wind Engineering and Industrial Aerodynamics,1991,37(3):311-326.
[8]BEARMAN P W,HARVEY J K.Control of circular cylinder flow by the use of dimples[J].AIAA Journal,1993,31(10):1753-1756.
[9]OKAJIMA A,NAGAMORI T,MATSUNAGA F,et al.Some experiments on flow-induced vibration of a circular cylinder with surface roughness[J].Journal of Fluids and Structures,1999,13(7):853-864.
[10]ALLEN D W,HENNING D L.Surface roughness effects on vortex-induced vibration of cylindrical structures at critical and supercritical Reynolds numbers[C]∥Proceedings of the Offshore Technology Conference.Houston:OTC,2001.
[11]BERNITSAS M M,RAGHAVAN K,DUCHENE G.Induced separation and vorticity using roughness in VIV of circular cylinders at 8×103
[14]GAO Y,FU S,WANG J,et al.Experimental study of the effects of surface roughness on the vortex-induced vibration response of a flexible cylinder[J].Ocean Engineering,2015,103:40-54.
[15]ZHAO M,TONG F,CHENG L.Numerical simulation of two-degree-of-freedom vortex-induced vibration of a circular cylinder between two lateral plane walls in steady currents[J].Journal of Fluids Engineering,2012,134(10):377-390.
[16]NAVROSE,MITTAL S.Free vibrations of a cylinder:3D computations at Re=1 000[J].Journal of Fluids and Structures,2013,41:109-118.
[17]LEONTINI J,THOMPSON M,HOURIGAN K.The beginning of branching behavior of vortex-induced vibration during two-dimensional flow[J].Journal of Fluids and Structures,2006,22(6/7):857-864.
[18]BOURGUET R,JACONO D.Flow-induced vibrations of a rotating cylinder[J].Journal of Fluid Mechanics,2014,740:342-380.
[19]ZHAO M,CUI Z,KWOK K,et al.Wake-induced vibration of a small cylinder in the wake of a large cylinder[J].Ocean Engineering,2016,113:75-89.
[20]PRASANTH T,MITTAL S.Vortex-induced vibration of two circular cylinders at low Reynolds[J].Journal of Fluids and Structures,2009,25(4):731-741.
[21]BAO Y,HUANG C,ZHOU D,et al Two-degree-of-freedom flow induced vibrations of isolated and tandem cylinders with varying natural frequencies[J].Journal of Fluids and Structures,2012,35:50-75.
[22]JAUVTIS N,WILLIAMSON C H K.The effect of two degrees of freedom on vortex-induced vibration at low mass and damping[J].Journal of Fluid Mechanics,2004,59:23-62.
[23]ZHAO M,KAJA K,XIANG Y,et al.Vortex-induced vibration(VIV)of a circular cylinder in combined steady and oscillatory flow[J].Ocean Engineering,2013,73:83-95.
[24]FENG C.The measurement of Vortex-induced effects in flow past a stationary and oscillating circular and D-section cylinders[D].Vancouver:University of British Columbia,1968.
[25]SUMER B M,FREDSE J.Hydrodynamics around cylindrical structures[J].Singapore:World Scientific,1997:26.
[26]MOE G,WU Z J.The lift force on a cylinder vibrating in a current[J].ASME Journal of Offshore Mechanics and Arctic Engineering,1990,112(4):297-303.
[27]KHALAK A,WILLIAMSON C H K.Fluid forces and dynamics of a hydroelastic structure with very low mass and damping[J].Journal of Fluids and Structures,1997,11(8):973-982.
[28]KHALAK A,WILLIAMSON C H K.Motions,forces and motion transitions in vortex-induced vibration at low massdamping[J].Journal of Fluids and Structures,1999,13:813-851.
[29]SARPKAYA T.Fluid forces on oscillating cylinders[J].Nasa Sti/recon Technical Report A,1979,104(3):275-290.
[30]ARONSEN K H.An experimental investigation of in-line and combined in-line and cross-flow vortex induced vibrations[D].Trondheim:NTNU,2007.