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突扩跌坎水舌落点冲击力分析及底坡优化

发表时间:2009-02-28  浏览量:1756  下载量:633
全部作者: 徐一民,刘善均,许唯临,王韦
作者单位: 四川大学水力学与山区河流开发保护国家重点实验室;昆明理工大学电力学院
摘 要: 工程实践证明掺气减蚀是一种既经济又有效的减蚀措施,研究给出了作为较新型的掺气设施——突扩跌坎水舌下缘落点的一种计算方法,分析和计算了水舌对下游底板的冲击力。通过优化底坡和底板体型,使水流对底板的冲击力减小,减弱溅水强度,从而弱化突扩跌坎水舌引起的水翅。优化结果显示坎后底板型式宜采用上凸曲线型,所得结论得到了试验验证。
关 键 词: 水利水电工程;突扩跌坎;冲击力;底坡优化
Title: Analysis on impulsive force of jet flow through an aerator with vertical drop and sudden lateral enlargement and bottom slope optimization
Author: XU Yimin, LIU Shanjun, XU Weilin, WANG Wei
Organization: State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University; Electricity Institute, Kunming University of Science and Technology
Abstract: Engineering practice proved that aeration is an economical and effective measure to alleviate cavitation, the paper establishes a method for calculating drop point of jet flow from an aerator with vertical drop and sudden lateral enlargement, as a relatively new aeration facility. Impulsive forces on lower floor by jet flow from the aerator are analyzed and calculated in the paper. By optimizing bottom slope and floor shape, impulsive force of jet flow from the aerator is reduced and thus the water wing caused by jet flow is weakened. The optimum result shows that the shape of floor is better to be convex carve. Conclusions in this paper are tested and verified well with experimental data.
Key words: water conservancy and hydropower engineering; sudden enlargement and bottom drop; impulsive force; bottom slope optimization
发表期数: 2009年2月第4期
引用格式: 徐一民,刘善均,许唯临,等. 突扩跌坎水舌落点冲击力分析及底坡优化[J]. 中国科技论文在线精品论文,2009,2(4):339-344.
 
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