Abstract
In pursuit of possibly true turbulent characters and for exploring a change in turbulence structures near an oscillating flexible wall-curved surface, a sinusoidal oscillation mode was forced to a curved wall, whose vibrations disturbed the flow with an interacting effort between the fluid and the structure. The methodology used was the Large Eddy Simulation (LES) with fluid-structure interaction. The oscillating configuration was on a Fourier sinusoidal mode from the measurements of a Francis hydro turbine blade vibration. The effects of the vibration on the skin friction coefficient, vortices, turbulent coherent structures, and other statistical quantities were studied. The results showed that the streamwise velocity gradient along the normal direction and the normal velocity gradient along the spanwise direction were considerably increased within the viscous sublayer because of the oscillating wall, which additionally caused the low speed streaks to stay away from the wall and the high-momentum flows to be toward the wall. As a result, the streamwise vortices were much more elongated along the downstream to get an energy balance, and the wall skin friction coefficient or the wall friction velocity rose up.
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References
GURCHENKOV A. B. The unsteady motion of a viscous fluid between rotating parallel walls [J]. Appl. Mat N. Mech., 2002, 66(2): 239–243.
MISRA J. C., PAL B., PAL A. et al. Oscillatory entry flow in a plane channel with pulsating walls [J]. International Journal of Non-Linear Mechanics, 2001, 36(5): 731–741.
KHALED A. R. A., VAFAI K. The effect of the slip condition on Stokes and Couette flows due to an oscillating wall: exact solutions [J]. International Journal of Non-Linear Mechanics, 2004, 39(5): 795–809.
JUNG W. J., MANGIAVACCHI N., AKHAVAN R. Suppression of turbulence in wall-bounded flows by high-frequency spanwise oscillations [J]. Phys. Fluids A, 1992, 4(8): 1605–1607.
CHOI H., MOIN P., KIM I. Active turbulence control for drag reduction in wall-bounded flows [J]. J. Fluid Mech., 1994, 262: 75–110.
ENDO T., KASAGI, N., SUZUKI Y. J. Feedback control of wall turbulence with wall deformation [J]. Int. J. Heat Fluid Flow, 2000, 21(5): 568–575.
ZHAO H., WU J. Z., LUO J. S. Turbulent drag reduction by traveling wave of flexible wall[J]. Fluid Dynamics Research, 2004, 34(3): 175–198.
MITO Y., KASAGI N. DNS study of turbulence modification with streamwise-uniform sinusoidal wall-oscillation [J]. Int. J. Heat Fluid Flow, 1998, 19(5): 470–481.
LIU Xiao-bing, ZENG Yong-zong and CAO Shu-you. Numerical prediction of vortex flow in hydraulic turbine draft tube for LES [J]. Journal of Hydrodynamics, Ser. B, 2005, 17(4): 448–454.
BAI Yu-chuan, WANG Zhao-yin. Large eddy simulation for plunging breaker wave [J]. Journal of Hydrodynamics, Ser. B, 2003, 15(4): 70–78.
FAN Hong-ming, REN Hong-ze, LI Xiaoting et al. Numerical study on air flow around an opening with large eddy simulation [J]. Journal of Hydrodynamics, Ser. B, 2003, 15(6): 45–48.
CHEN Yong-ping, LI Chi-wai and ZHANG Chang-kuang. Large eddy simulation of vertical jet impingement with a free surface [J]. Journal of Hydrodynamics, Ser. B, 2006, 18(2): 148–155.
WANG Fu-jun, LI Yao-jun et al. CFD simulation of 3D flow in large-bore axial-flow pump with half-elbow suction sump [J]. Journal of Hydrodynamics, Ser. B, 2006, 18(2): 243–247.
SMITH C. R., METZLER S. P. The characteristics of low-speed streaks in the near-wall region of a turbulent boundary layer [J]. J. Fluid Mech., 1983, 129: 27–54.
BROOK J. W., HANRATTY T. J. Origin of turbulence-Producing eddies in a channel flow [J]. Phys. Fluids A, 1993, 5(4): 1011–1022.
SMAGORINSKY J. General circulation experiments with the primitive equations [J]. The Basic Experiment, Mon. Weath., 1963, 91(3): 99–164.
SAKAMOTO S., MURAKAMI S., MOCHIDA A. Numerical study on flow past 2D square cylinder by large eddy simulation: comparison between 2D and 3D computations [J]. J. Wind Eng. Ind. Aerodyn., 1993, 50: 61–68.
SUKSANGPANOMRUNG A., DJILALI N., MOINAT P. Large-eddy simulation of separated flow over a blurectangular plate [J]. Int. J. Heat Fluid Flow, 2000, 21(5): 655–663.
KOGAKI T., KOYAYASHI T. Large-eddy simulation of flow around a rectangular cylinder [J]. Fluid Dynamics Res., 1997, 20(1–6): 11–24.
CHOI H., MOIN P. Effects of the computational time step on numerical solutions of turbulent flow[J]. J. Comput. Phys., 1994, 113(1): 1–4.
KALITZIN G., WU X. H., DURBIN P.B. DNS of fully turbulent flow in a LPT passage [J]. Int. J. Heat Fluid Flow, 2003, 24(4): 636–644.
RODI W. DNS and LES of some engineering flows [J]. Fluid Dynamics Res., 2006, 38(2–3): 145–173.
LAADHARI F., SKANDAJI L., MOREL R. Turbulence reduction in a boundary layer by a local spanwise oscillating surface [J]. Phys. Fluids, 1994, 6(10): 3218–3220.
CHOI K. S., DEBISSCHOP J. R., CLAYTON B. R. Turbulent boundary-layer control by means of spanwise-wall oscillation [J]. AIAA J., 1998, 36(7): 1157–1163.
BARON A., QUADRIO M. Turbulent drag reduction by spanwise wall oscillations[J]. Appl. Sci. Res., 1995, 55(4): 311–326.
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Project supported by the National Natural Science Foundation of China (Grant No. 50579025).
Biography: Wang Wen-quan(1977-),Male, Ph. D. Student
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Wang, Wq., Zhang, Lx. & Yan, Y. Study on Turbulence Features Near an Oscillating Curved Wall. J Hydrodyn 19, 255–263 (2007). https://doi.org/10.1016/S1001-6058(07)60057-2
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DOI: https://doi.org/10.1016/S1001-6058(07)60057-2