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《Journal of Zhejiang University(Engineering Science)》 2010-01
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Simulation of slit-type vertical turbulent jet in flowing shallow water

MA Jian 1,2 ,CAO Wei-ping3,JIANG Cheng-jie4,YIN Ze-gao5,GUO Shuai1(1.Department of Civil Engineering,Zhejiang University,Hangzhou 310027,China;2.Highway Management Department of Taizhou,Taizhou 318000,China;3.College of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;4.Department of Municipal Construction,Zhejiang College of Construction,Hangzhou 311231,China;5.Department of Civil Engineering,Ocean University of China,Qingdao 266100,China)  
The jet's impaction scope and the transform condition of flow type were presented for studying the characteristics of slit-type jet in flowing shallow water.The free flow surface was tracked by applying the volume of fluid (VOF) method,and the renormalization group (RNG) kinetic energy-dissipation rate (k-ε) turbulent model was adopted to simulate the slit-type vertical turbulent jet in flowing shallow water.The velocity distribution and the free water-surface position were numerically simulated,and the results were compared to the physical experiment data,and then the transform condition of flow type was studied.Numerical simulation results agreed with the experimental results.The vertical velocity distribution of the jet outlet section fits the attenuation law of the jet velocity in semi-unlimited area;the characteristics of velocity fields and the positions of free water-surface are different for low velocity ratio,critical velocity ratio and high velocity ratio;the elevation of free water-surface is concerned with the velocity ratio and the water depth ratio;and the jet's impaction distance on the upriver increases with the increase of velocity ratio.
【CateGory Index】: TV135.2
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