Research Advances in Flow Characteristics Near SubmergedRiver Regulation Structures

  • GE Yao ,
  • CHEN Chang-ying
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  • 1.Hydraulics and Hydropower Institute, Hohai University, Nanjing 210098, China;
    2.Nanjing Hydraulic Research Institute, Nanjing 210029, China

Received date: 2014-09-12

  Online published: 2015-05-14

Abstract

On the basis of research achievements in China and abroad, we made a review on the complex flow characteristics (flow velocity, shear stress distribution, eddy flow structure, turbulent kinetic energy, scale effect, separation zone, roughness coefficient and immersion ratio) near submerged river improvement structures (submerged groyne(dikes), vanes, cylindrical and beach-protection belt). We also discussed the mechanism of scouring and backwater effects. Research results indicate that the flow characteristics are determined by the disturbance of these submerged structures to flow. The induced eddy flow and backwater greatly affect the flow structure, increase local bed resistance, and redistribute the comprehensive roughness coefficient. Finally we present the shortcomings of the achievements and put forward prospects to future research.

Cite this article

GE Yao , CHEN Chang-ying . Research Advances in Flow Characteristics Near SubmergedRiver Regulation Structures[J]. Journal of Changjiang River Scientific Research Institute, 2015 , 32(5) : 66 -71 . DOI: 10.3969/j.issn.1001-5485.2015.05.013

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