泄槽底坡对掺气坎射流空腔积水的影响  

Effect of chute bottom slope on backwater in cavity of jet flow from chute aerator

作　　者：徐一民[1] 杨红宣[1] 赵伟[1] 王海军[1] 

机构地区：[1]昆明理工大学电力工程学院,云南昆明650051

出　　处：《水利水电技术》2009年第12期47-51,共5页Water Resources and Hydropower Engineering

基　　金：云南省自然科学基金(2006E0018M);昆明理工大学人才科研启动基金(14118140)

摘　　要：通过作者建立的掺气坎射流曲线方程和掺气空腔积水方程,分析计算了泄槽底坡对跌坎型、挑坎型和挑跌坎型3种掺气坎掺气空腔积水的影响。计算结果表明,泄槽底坡对3种体型掺气坎掺气空腔积水的影响规律是一致的。随泄槽底坡增大,空腔积水减弱,最终消失;掺气坎后挑射水流与底板的冲击角随泄槽底坡增大而减小;不同体型掺气坎的临界冲击角是不一样的。研究成果可为掺气坎的设计提供参考。Based on the equation for the trajectory of the jet flow from an aerator and the equation for the backwater in the cavity those established by the authors, the effect of the spillway chute bottom slope on the backwater in three different types of aerators are calculated herein. The results show that the law of the influence of the bottom slop on the backwater in the cavity for the three different types of aerators is identical. With the increase of the slop, the backwater in the cavity is reduced and finally disappears. The angle between the jet flow and the bottom slab of the chute at the end of the cavity is decreased with the increase of the bottom slop. The critical angle of the jet flow is different for different aerators. The study result can be provided as useful references for the aerator design concerned.

关 键 词：泄槽 掺气坎 空腔积水 底坡 

分 类 号：TV135.2[水利工程—水力学及河流动力学]