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《Beijing Water》 2011-04
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Application of stepped energy dissipation on chute design

CAI Sheng-li1 ZHANG Xiu-song1 LIU Wan-xin1 LI Mei1 LI Xia2(1.China Water Resources Beifang Investigation,Design & Research Co Ltd,Tianjin,300222,China; 2.General Courses Department,Academy of Military Transportation,Tianjin,300162,China)  
The slop is mild and head is big for long distance stepped chute spillways,which needs a large downstream energy dissipators.A stepped chute spillway is designed to augment coefficient of roughness and reduces the size of the required downstream stilling basin.This article calculates the hydraulics of long distance and stepped chute spillways applying Approximate Coefficient of Roughness Calculation,CHANSON Empirical Equation.The result is reasonable meeting the experience.Both of the calculation methods can be applied to engineering design which is proved by practically running.The stepped chute is significant increment of the energy dissipation,also reduces the velocity of air-entrained flow and the engineering investment.
【CateGory Index】: TV734
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