Research on Drag Characteristic of Flow around Finite Circular Cylinder at High Reynolds Numbers

doi:10.3901/JME.2015.22.176

Abstract

Abstract: Large eddy simulation(LES) method and Reynolds average are applied to simulate drag characteristics at high Reynolds around finite circular cylinder, according to aspect ratio L/D. The Variation of drag coefficient with L/D and Reynolds number are taken. and the influence of the end face to the drag coefficient is also revealed. The results show that in the sub-critical region the drag coefficient has a linear change and increases with increase in L/D for the same Reynolds, additionally the influence of L/D to drag coefficient is large than the influence of Re; In the critical region the drag coefficient has a quadratic function change and increases with increase in L/D for the same Reynolds, and Re at turning point of drag coefficient under various conditions are different, additionally the influence of Re to drag coefficient is large than the influence of L/D; In the rise region the turning point of drag coefficient goes backwards with increase in Re. In each region the influence of the end face to the drag coefficient goes appreciably with increase in Re and the most effecting field is 16% in height of circular cylinder. Some meaningful references are provided for the further research on the characteristics of the flow around finite circular cylinder.

Key words: aspect ratio, drag coefficient, finite circular cylinder, high Reynolds number

ZHAO Meng, MAO Jun, XI Yanhong. Research on Drag Characteristic of Flow around Finite Circular Cylinder at High Reynolds Numbers[J]. Journal of Mechanical Engineering, 2015, 51(22): 176-182.

References

[1] FINNEMORE J E，FRANZINI J B，ALLAIRE P. 流体力学及其工程应用[D]. 北京：机械工业出版社，2006. FINNEMORE J E， FRANZINI J B， ALLAIRE P. Fluid mechanics with engineering applications[M]. Beijing：China Machine Press，2006.
[2] SADEH W Z，SAHARON D B，LEWIS R C，et al. Turbulence effect on crossflow around a circular cylinder at subcritical Reynolds numbers[R]. Washington D.C.：National Aeronautics and Space Administration, Scientific and Technical Information Branch，1982.
[3] RAMAMURTHY A S，LEE P M. Wall effects on flow past bluff bodies[J]. Journal of Sound and Vibration，1973，31(4)：443-451.
[4] ACHENBACH E. Distribution of local pressure and skin friction around a circular cylinder in cross-flow up to Re=5×106[J]. Journal of Fluid Mechanics，1968，34(4)：625-639.
[5] VAKIL A，GREEN S I. Drag and lift coefficients of inclined finite circular cylinders at moderate Reynolds numbers[J]. Computers and Fluids，2009，38(9)：1771-1781.
[6] GUO Xiaohui，LIN Jianzhong，NIE deming. New formula for drag coefficient of cylindrical particles[J]. Particuology，2011，9(2)：114-120.
[7] BAKER C. The flow around high speed trains[J]. Journal of Wind Engineering and Industrial Aerodynamics，2010，98(6)：277-298.
[8] BOCCIOLONE M，CHELI F，CORRADI R，et al. Crosswind action on rail vehicles：Wind tunnel experimental analyses[J]. Journal of Wind Engineering and Industrial Aerodynamics，2008，96(5)：584-610.
[9] 汪健生，赵云俭，朱强. 小尺度圆柱涡流发生器的传热与流动特性[J]. 机械工程学报，2015，51(8)：204-212.WANG Jiansheng，ZHAO Yunjian，ZHU Qiang. Heat transfer and flow characteristics of small scale circular cylinder vortex generator[J]. Journal of Mechanical Engineering，2015，51(8)：204-212.
[10] 丁林，张力，杨仲卿. 高雷诺数时分隔板对圆柱涡致振动的影响[J]. 机械工程学报，2013，49(14)：134-139.DING Lin，ZHANG Li，YANG Zhongqing. Effect of splitter plate on vortex-induced vibration of circular cylinder at high Reynolds number[J]. Journal of Mechanical Engineering，2013，49(14)：134-139.
[11] 王福军，张玲，黎耀军，等. 轴流式水泵非定常湍流数值模拟的若干关键问题[J]. 机械工程学报，2008，44(8)：73-77.WANG Fujun，ZHANG Ling，LI Yaojun，et al. Some key issues of unsteady turbulent numerical simulation in axial-flow pump[J]. Chinese Journal of Mechanical Engineering，2008，44(8)：73-77.
[12] 金文. 湍流结构及大涡模拟研究[J]. 能源与环境，2005(4)：11-14. JIN Wen. Research on the turbulence structure and LES method[J]. Energy and Environment，2005(4)：11-14.
[13] NISHIMUA H，TANIKE Y. Aerodynamic characteristics of fluctuating forces on a circular cylinder[J]. Journal of Wind Engineering and Industrial Aerodynamics，2001，89：713-723.
[14] 陶文铨. 数值传热学[M]. 西安：西安交通大学出版社，2001.TAO Wenquan. Numerical heat transfer[M]. Xi’an：Xi’an Jiaotong University Press，2001.
[15] 张兆顺，崔桂香，许春晓. 湍流大涡数值模拟的理论和应用[M]. 北京，清华大学出版社，2008.ZHANG Zhaoshun，CUI Guixiang，XU Chunxiao. The large eddy turbulence theory and application of numerical simulation[M]. Beijing：Tsinghua University Press，2008.
[16] ZDRAVKOVICH M M，BRAND V P，MATHEW G，et al. Flow past short circular cylinders with two free ends[J]. Journal of Fluid Mechanics，1989，203：557-575.