梯形断面消力池扩散型消能计算  

Energy dissipation calculation for diffused stilling basin with trapezoidal cross section

作　　者：黄朝煊 

机构地区：[1]浙江省水利水电勘测设计院,浙江杭州310002

出　　处：《水利水电科技进展》2016年第5期34-39,共6页Advances in Science and Technology of Water Resources

基　　金：水利部公益性行业科研专项(201401010);浙水院科标业项目(B1608;B1609)

摘　　要：针对目前NB/T 35023—2014《水闸设计规范》只涉及矩形断面消力池,未涉及梯形断面消力池消能计算的问题,基于水力学基本理论和数值分析理论对梯形断面消力池消能计算进行研究,推导了梯形断面收缩水深的解析计算式以及梯形断面消力池扩散型消能跃后共轭水深基本方程,并利用高次方程求解理论分别给出棱柱体梯形断面跃后共轭水深的解析计算式和扩散型消能跃后共轭水深的简易迭代求解公式,并根据消能计算方程,给出梯形断面消力池扩散型消力池池深、池长的计算式。工程实例计算结果表明,所提出计算式精度可靠。As the current standard NB/T 35023—2014“sluice design specification” involves stilling basin with rectangular cross section, excluding stilling basin with trapezoid section, energy dissipation calculation for stilling basin with trapezoidal cross section were studied on the basis of the classical hydraulics theory and numerical analysis. The analytical formula of shrinking depth and the equation of conjugate depth after hydraulic jump of stilling basin with trapezoidal cross section were derived. Using theory of high-order equation, simple iterative formulas for conjugate depth after hydraulic jump of stilling basin with prismatic trapezoidal cross section and diffused trapezoidal cross section were given, respectively. Finally, the calculation formulas for depth and length of the stilling basin with trapezoidal cross section were obtained according to the energy dissipation equation. Calculation results of a practical project validate the proposed formula has high accuracy.

关 键 词：消力池 水闸 梯形断面 收缩水深 跃后共轭水深 扩散比 

分 类 号：TV653[水利工程—水利水电工程] TV135.2