底流消能综合式消力池挖深深度计算探讨简

底流消能是借助于一定的工程措施控制水跃位置，通过水跃发生的表面旋滚和强烈紊动来消除余能．底流消能综合式消力池适当降低护坦的高程，同时又修建不太高的消能坎，是一种造价经济的消力池．文章应用不同计算方法计算了综合式消力池的挖深深度和消能坎高度．将结果对比分析发现：采用能量方程的计算方法得出的消力池深度比较合适．而采用由动量方程得出的计算方法所得结果偏小33．5％．最后从原理上分析了由动量方程得出的计算方法计算结果偏小的原因．建议消力池挖深深度的计算采用能量方程得出的方法．

Calculation of the Height of Energy Dissipation Pool

Under flow energy dissipation takes some engineering measures to control water jump position in, and to eliminate residual energy by the water jump surface roller and strong turbulence. Comprehensive energy dissipation pool is a cost-economy en- ergy dissipation pool due to lower apron elevation and building not too high energy dissipation obstacle. The previous studies on the conjugation water depth and the length of free hydraulic jump for a gradually expanding stilling basin were analyzed. The height of obstacle at the end of a gradually expanding flat-bottom stilling basin was calculated by different calculation methods. The compara- tive analysis of calculation results shows that the method using energy equation is more appropriate, and that the calculation result of the height of obstacle by the method using momentum equation is 33.5% smaller than that by the method using energy equation. Fi- nally, the factor causing the calculation value of obstacle height too small was analyzed, and the calculation method using energy e- quation is suggested.