低Fr数、小底坡泄洪洞掺气设施研究  

Study on Aerator of Hydraulic Tunnel with Low Fr Number and Slight Slope

作　　者：叶茂[1] 姜跃良[1] 吕海艳[1] 王川[1] 蒲云娟 

机构地区：[1]中国电建集团成都勘测设计研究院有限公司,四川成都610072

出　　处：《水力发电》2015年第1期91-94,共4页Water Power

摘　　要：泄洪洞具有高流速、低Fr数和小底坡的特点,掺气空腔容易产生回水,布置掺气设施的难度较大。采用模型试验和理论分析相结合的方法对泄洪洞掺气设施进行研究。通过比较掺气挑坎高度、坡度、坎后底坡及衔接形式,分析这些特征参数对空腔回水、通气量及流态的影响,拟合了空腔无回水的临界Fr数与挑坎高度的关系式,总结了掺气设施体形优化方法,研究成果已被实际工程所采用。With the characteristics of high flow velocity, low Fr number and slight slope of hydraulic tunnel, the backwater frequently occurs in the downstream of aerated cavity, so the aerator design of hydraulic tunnel is difficult. The model investigation and theory analysis are used to study the aerator. By comparing the height, slope and type of aerator, the influences of those factors on backwater, aerated volume and flow pattern are analyzed. The formula between the critical Fr number and the aerator height is obtained and the shape optimization method of aerator is generalized. The research results have been applied in actual hydraulic projects.

关 键 词：泄洪洞 掺气设施 空腔回水 Fr数 体形优化 

分 类 号：TV131.34[水利工程—水力学及河流动力学]