中国物理B ›› 2008, Vol. 17 ›› Issue (3): 1034-1040.doi: 10.1088/1674-1056/17/3/048

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Vertical rotation effect on turbulence characteristics in an open channel flow

李步阳1, 邹立勇2, 柏劲松2, 谭多望2, 李平2, 刘仓理2   

  1. (1)General Electric Hydro Equipment Asia Co. Ltd., Hangzhou 311231, China; (2)Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China
  • 收稿日期:2007-04-16 修回日期:2007-08-07 出版日期:2008-03-04 发布日期:2008-03-04
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10772166 and 10672151), and the Foundation of China Academy of Engineering Physics (Grant No 20050104).

Vertical rotation effect on turbulence characteristics in an open channel flow

Zou Li-Yong(邹立勇)a)† , Bai Jing-Song(柏劲松)a), Li Bu-Yang(李步阳)b),Tan Duo-Wang(谭多望)a), Li Ping(李平)a), and Liu Cang-Li(刘仓理)a)   

  1. a Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China; b General Electric Hydro Equipment Asia Co. Ltd., Hangzhou 311231, China
  • Received:2007-04-16 Revised:2007-08-07 Online:2008-03-04 Published:2008-03-04
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10772166 and 10672151), and the Foundation of China Academy of Engineering Physics (Grant No 20050104).

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摘要： This paper solves the three-dimensional Navier--Stokes equation by a fractional-step method with the Reynolds number Re$_\tau $=194 and the rotation number $N_\tau $=0--0.12. When $N_\tau $ is less than 0.06, the turbulence statistics relevant to the spanwise velocity fluctuation are enhanced, but other statistics are suppressed. When $N_\tau $ is larger than 0.06, all the turbulence statistics decrease significantly. Reynolds stress budgets elucidate that turbulence kinetic energy in the vertical direction is transferred into the streamwise and spanwise directions. The flow structures exhibit that the bursting processes near the bottom wall are ejected toward the free surface. Evident change of near-surface streak structures of the velocity fluctuations are revealed.

关键词: vertical rotating open channel flow, turbulence statistics, flow structure

Abstract: This paper solves the three-dimensional Navier--Stokes equation by a fractional-step method with the Reynolds number Re$_\tau $=194 and the rotation number $N_\tau$ =0--0.12. When $N_\tau $ is less than 0.06, the turbulence statistics relevant to the spanwise velocity fluctuation are enhanced, but other statistics are suppressed. When $N_\tau $ is larger than 0.06, all the turbulence statistics decrease significantly. Reynolds stress budgets elucidate that turbulence kinetic energy in the vertical direction is transferred into the streamwise and spanwise directions. The flow structures exhibit that the bursting processes near the bottom wall are ejected toward the free surface. Evident change of near-surface streak structures of the velocity fluctuations are revealed.

Key words: vertical rotating open channel flow, turbulence statistics, flow structure

中图分类号:  (Channel flow)

  • 47.27.nd
47.10.ad (Navier-Stokes equations) 47.27.eb (Statistical theories and models) 47.32.C- (Vortex dynamics)