跌坎型底流消能工消力池内的水力特性受到跌坎深度的影响。应用平面紊动射流理论, 以消力池内允许的最 大时均动水压强为控制目标, 对于跌坎最小深度的确定方法进行了初步分析, 建立了计算跌坎最小深度值的理论公 式。通过水力学试验方法, 得到消力池底板时均动水压强与跌坎最小深度之间的关系, 同时与跌坎最小深度试验值 进行了比对, 对本文建立的理论公式进行了验证。

The hydraulic characteristics of the falling2sill bottom2flow energy dissipation pool are affected by the falling 2sill depth. In order to control the allowable maximum time 2averaged dynamic water pressure in the dissipation pool, a method and its theoretic formula for determining the minimum falling2sill depth are preliminarily analyzed and derived using the plane turbulent jet theory. Based on the hydraulic model experiments, the relationship between the time 2averaged dynamic water pressure on the bottom plate and the minimum falling 2sill depth is obtained. T he calculated falling2sill depth is compared with the measured val2 ue to verify the applicability of theoretic formula.

国家自然科学基金/ 跌坎型底流消能工水流流动结构水力特性研究0( 51169008)