摘要
台阶式溢洪道是水利工程中常见的新型泄洪消能方式之一,相比于其他消能方式有较高的消能率、能很好地降低溢洪道末端流速,工程造价低、不易发生空蚀等诸多优点。文章概述了台阶式消能工机理及其主要研究方法,归纳了学者对台阶式消能已有的研究结果,并从溢洪道表面台阶设置、水力特性参数、台阶自身形态与消能特性关系3个方面总结了消能率的影响因素,进一步讨论了"M"和"V"2种新型的台阶溢洪道消能特性,通过改变台阶形态增强了消能效果,较大程度地缩减了溢洪道的长度,降低了对下游消能设施的要求。
The stepped spillway is one of the new ways of flood discharge and energy dissipation in water conservancy projects. Compared with other energy dissipation methods, it is of higher energy dissipation rate, lower flow velocity at the end of the spillway, low engineering cost and low possibility to cavitation etc.. The paper outlines the mechanism of the step-type energy dissipator and its main research methods, and summarizes the existing research results of the step-type energy dissipation by other scholars, and summarizes the influencing factors of energy dissipation rate from the relationship between the step setting of the spillway surface, the hydraulic characteristic parameters, the shape of the step and the energy dissipation characteristics. The paper further discusses the energy dissipation characteristics of two new types of stepped spillway in shape of "M" and "V". By changing the shape of the step, the energy dissipation effect is enhanced, the length of the spillway is significantly decreased and the requirement on downstream energy dissipating facilities is reduced.
作者
刘爽
宁利中
宁碧波
渠亚伟
田伟利
LIU Shuang;NING Lizhong;NING Bibo;QU Yawei;TIAN Weili(State Key Laboratory of Ecological Water Conservancy in Northwest Arid Region (Xi'an University of Technology),Xi'an 710048,China;College of Architecture Engineering, Jiaxing University, Jiaxing, Zhejiang 314001,China;Department of Architecture, Shanghai University, Shanghai 200444,China)
出处
《西北水电》
2019年第1期42-47,共6页
Northwest Hydropower
关键词
台阶式溢洪道
消能率
掺气
影响因素
消能特性
stepped spillway
energy dissipation rate
aeration
influencing factor
energy dissipation
