阻塞对水平旋流泄洪洞水力特性的影响  

The Effect of Barrage upon the Hydraulic Characteristics of the Level Rotary Flow Discharge Tunnel

作　　者：安丰勇[1] 付波[1] 牛争鸣[1] 张宗孝[1] 史妍维[1] 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048

出　　处：《西安理工大学学报》2008年第2期210-214,共5页Journal of Xi'an University of Technology

基　　金：国家自然科学基金-雅砻联合基金资助项目(50579086)

摘　　要：通过模型试验,对旋流阻塞复合式泄洪洞的流态与水力特性进行了研究。研究结果表明,在竖井为有压流的条件下,旋流阻塞复合式泄洪洞的流态可分为阻塞完全与阻塞不完全空腔旋流二种基本流态;设置阻塞后,泄洪洞的流量有一定的减小,水平旋流洞段的壁面压强增大、旋流角增大,空腔直径减小,通气量变化规律更为复杂。设置阻塞后,除泄流量有一定的减小而对工程不利外,其它的阻塞效应均对工程有利。因此利用其阻塞效应,可进一步降低结构设计与防护措施,降低工程风险,提高消能率。Through the model test, this paper investigates the basic flow state and hydraulic characteristics of the swirl tunnel contained barrage. The research results indicate that in the case of the shaft with pressure flow, the flow state of the rotary flow barrage compound flood discharge tunnel can be divided into two types of basic flow states, i.e. the complete and incomplete empty-cavity rotary flows. After the barrages are set up, the discharging capacity of the flood discharge tunnel decreases; the wall pressure stress of the level rotary flow tunnel section increases; the angle of rotational flow enlarges; the empty- cavity diameter decreases; and the varying law of ventilating amount is getting more and more complex. After the barrages are set up, the barrage effects are favorable upon the engineering projects except for the decrease in the discharge capacity unfavorable to the engineerings. Accordingly, the barrage effects can be used to further lower structure design and protection measures and to reduce engineering risks and to improve the energy dissipation efficiency.

关 键 词：泄洪洞 水平旋流 阻塞效应 基本流态 水力特性 

分 类 号：TV651.3[水利工程—水利水电工程]