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本文主要论述了面流消能五种典型流态近底紊动流速特性,总结出了近底时均流速和紊动强度沿程变化规律,提出了近底紊动流速可能出现的最大瞬时值及相应位置的计算公式。面流消能工程的下游防冲设计中考虑的主要水力参数之一是,消能段近底流速紊动可能出现的最大瞬时值及其相应的部位,但目前国内外研究成果较少。笔者通过水工模型试验重点研究了面流消能各典型流态近底流速及其紊动纵向分量沿程的变化规律,并提出了计算公式,为优化面流设计提供科学依据。
In this paper, the characteristics of near-end turbulent flow velocity in five typical fluid regimes of surface-flow energy dissipation are discussed, and the variation law of mean velocity and turbulence intensity along the bottom is summarized. The maximum instantaneous value of turbulence velocity And the corresponding position of the formula. One of the main hydraulic parameters considered in the downstream anti-scuffing design of the surface flow energy dissipation project is the maximum instantaneous value of turbulence near the bottom of the energy dissipation section and its corresponding parts, but there are few research results at home and abroad. Through the hydraulic model test, the author studies the variation law of near-bottom flow velocity and its turbulent vertical component along each typical flow regime of surface flow energy dissipation, and puts forward the formula to provide a scientific basis for the optimization of the flow design.