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本文分析溢流坝下游旋滚面流上、下临界流态,考虑溢流坝体形俯角θ_5及坎咀水流离心力对流态的影响,用动量定理导出潜流方程和戽坎水跃方程。并用模(原)型观测资料进行验证。文中还讨论产生潜流的条件及扩大消能范围的措施。可供溢流坝消能设计参考。
This paper analyzes the upper and lower critical flow regimes of the downstream spiral surface of the overflow dam, considering the effects of the shape depression angle θ_5 of the overflow dam and the centrifugal flow of the ridge flow on the flow regime, and uses the momentum theorem to derive the subduction equation and the jump equation. And use the model (original) observation data to verify. The paper also discusses the conditions for generating undercurrent and measures to expand the scope of energy dissipation. Available for overflow dam energy dissipation design reference.