【摘要】 通过研究突扩式消力池T型水跃断面流速分布、最大流速沿程分布的变化规律、突扩式消力池T型水跃边界层的沿程变化规律,认为突扩式消力池T型水跃的断面流速分布具有相似性和分区性;边界层内断面流速即服从指数律分布也服从对数律分布;突扩式消力池T型水跃的最大流速沿程逐渐衰减;边界层厚度是水流运动粘滞系数、跃前断面水深、跃前断面平均流速和沿程距离的函数.提出了断面流速、沿程最大流速和边界层厚度的计算公式并对所提出的公式与已有文献的试验成果进行了对比分析,验证了计算方法的正确性.更多还原

【Abstract】 The sectionalvelocity distribution of T-shaped water jump in expanding stilling pool,the change rule of maximum flow velocity distribution and the distance evolution of boundary layer of T-shaped water jump in expanding stilling pool are all researched. The results indicate that sectionalvelocity distribution of T-shaped water jump in expanding stilling poolshows its similarity as well as its distinguish,while the sectional velocity in boundary layer complies with both exponential law distribution and logarithmic law distribution. The maximum flow velocity of T-shaped water jump in expanding stilling pooldegrades gradually along the course. The thickness of the boundary layer is a function of the viscosity coefficient of water flow motion,the waterdepth before jumping,the average sectional velocity before jumping and the distance along the path. The calculationformula for sectional flow,maximum velocity and the thickness of boundary layer are proposed and the test results are compared with existing literature analysis,the correctness of the calculation method is verified.更多还原