Study on Energy Dissipation Characteristics of Stepped Spillway Combined with X-shaped Wide Tail Pier
杨钊 YANG Zhao；杨川 YANG Chuan；张鑫华 ZHANG Xin-hua
（杨凌职业技术学院，杨凌 712100）
（Yangling Vocational & Technical College，Yangling 712100，China）
摘要：通过数值模拟对与 X 型宽尾墩联合的台阶溢洪道水流水力特性进行了研究，并结合不同工况下的水流流态、流速分布等水力要素，对溢洪道水流消能特性进行了探究。结果表明：单宽流量较小时，消能率与传统台阶溢洪道一致，可达 60%至 70%。当单宽流量较大时，挑射水流占下泄水流主体，消能效果不明显，台阶中心线末端消能率不足 25%，可能对台阶面造成破坏，宽度范围约为宽尾墩出口宽度的 2/3。
Abstract: The hydraulic characteristics of stepped spillway combined with X-shaped wide tail pier were studied through numerical simulation, and the energy dissipation characteristics of spillway flow were explored by combining hydraulic factors such as flow state and velocity distribution under different working conditions. The results show that when the single width flow is small, the energy dissipation rate is consistent with that of traditional stepped spillways, reaching 60% to 70%. When the single width flow rate is large, the jet water flow occupies the main body of the discharged water flow, and the energy dissipation effect is not obvious. The energy dissipation rate at the end of the centerline of the step is less than 25%, which may cause damage to the step surface. The width range is about 2/3 of the width of the outlet of the wide tail pier.
关键词：X 型宽尾墩；台阶溢洪道；数值模拟；消能特性
Key words: X-shaped wide tail pier；step spillway；numerical simulation；energy dissipation characteristics
中图分类号：TV651.1 文献标识码：A 文章编号：1006-4311（2024）28-113-04 doi:10.3969/j.issn.1006-4311.2024.28.034
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