“V”形台阶溢洪道的消能特性
Characteristics of Energy Dissipation for “V”-type Stepped Spillway
作者：田忠(1.四川大学 水力学与山区河流开发保护国家重点实验室，四川 成都 610065;2.中国水电顾问集团 成都勘测设计研究院，四川 成都 610072)；许唯临(四川大学 水力学与山区河流开发保护国家重点实验室)；余挺(中国水电顾问集团成都勘测设计研究院)；周鸿汉(中国水电顾问集团成都勘测设计研究院)；肖富仁(中国水电顾问集团成都勘测设计研究院)
Author：Tian Zhong(1. State Key Lab. of Hydraulics and Moutain River Eng., Sichuan Univ.,Chengdu 610065, China; 2. Chengdu Investigation and Design Inst., China Hydropower Consulting Group, Chengdu 610072, China)；Xu Weilin(State Key Lab. of Hydraulics and Moutain River Eng., Sichuan Univ.)；Yu Ting(Chengdu Investigation and Design Inst., China Hydropower Consulting Group)；Zhou Honghan(Chengdu Investigation and Design Inst., China Hydropower Consulting Group)；Xiao Furen(Chengdu Investigation and Design Inst., China Hydropower Consulting Group)
收稿日期：2009-01-04 年卷（期）页码：2010,42(2):21-25
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：台阶;溢洪道;数值模拟;消能
Key words：step；spillway；numerical simulation； energy dissipation
基金项目：国家自然科学基金资助项目(50809043)
中文摘要
针对前人对台阶溢洪道的研究多集中在台阶尺寸、布置形式、流态等问题，没有涉及到对台阶本身的形式的研究，提出了台阶形状在平面上呈“V”形的台阶溢洪道的布置形式，并采用三维紊流数值模拟的方法对比研究了“V”形台阶溢洪道和传统的“一”形台阶溢洪道的消能特性，研究结果表明： “V”形台阶后的漩涡尺度较“一”形台阶小，在中轴面上，“V”形台阶无漩涡存在，台阶面上形成三元水流状态； “V”形台阶上的负压区小，中轴面上无负压；在相同的台阶高度及长度以及同样的来流情况下，“V”形台阶的消能率高于传统的“一”形台阶。所提供的台阶形式可供工程参考。
英文摘要
A new type of stepped spillway with the plane layout similar to alphabet “V” was put forward. Numerical investigations were performed both for this type of stepped spillway and traditional stepped spillway. The results showed that the vortex range on the steps of “V”-type stepped spillway is smaller than that of traditional stepped spillway; for “V”-type stepped spillway, there is no vortex found in the symmetry wall and the flow on steps is three dimensional; the region of negative pressure is smaller than that of traditional stepped spillway, and on the same condition, the dissipation rate of “V”-type stepped spillway is higher than that of traditional stepped spillway.
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