阶梯－深潭系统的消能作用主要集中在深潭内，这是与深潭内水流的复杂流态有关的。梯上水流跌落深潭，与潭内水流发生碰撞，进而下切，引起旋滚、翻腾、紊动等一系列利于能量交换的现象。水流在深潭内经历急流向缓流转变的过程，能量随之被消刹在潭内，进而流向下游，达到消能的目的。在潭内复杂流态的分析上，旋涡的分析是具有代表性的，潭内无论出现横轴旋涡或者立轴旋涡，从它们与潭内水流翻滚摩擦以及旋涡间互相影响的角度来说，都是有利于消能的。%Step-pool system energy dissipation effect is mainly in deep pools,which is associated with deep pools of water in the complex flow. Ladder water drops deep pools,a collision with the water flow in the pool,and then cutting,rolling somersault and turbulence,causes a series of favorable energy exchange phenomenon. Flow experiences rapid to slow changes in deep pools,energy is killing in the lake,then flows downstream and achieves the purpose of energy dissipation. In deep pools in the analysis of complex flow,vortex analysis is representative,deep pool in no mat-ter transverse vortex or vortex,and pools of water flow in from their rolling friction and vortex influences each other's perspective,is conducive to en-ergy dissipation. This paper mainly analyzed the development of vertical and transverse vortex pool inside the case,calculated the energy dissipation rate of each condition and provided evidence for the utility of the step-pool system.
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