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突扩突跌型中闸室下游泄洪洞水力特性试验研究

发表时间:2013-01-31  浏览量:1579  下载量:453
全部作者: 王超,马旭东,戴光清,杨庆
作者单位: 西安兰特水电测控技术有限责任公司;四川大学水力学与山区河流开发保护国家重点实验室
摘 要: 采用物理模型试验手段,研究某工程突扩突跌型中闸室出口下游渥奇曲线段泄洪洞的水流流态、空腔长度和压力特性。试验研究表明:突扩体型下游泄洪洞内产生水翅现象无法避免,但可以通过优化突扩体型减小水翅以避免其打顶;采用闸室下游突扩突跌能增大侧空腔长度并使底空腔与侧空腔贯通,有效防止泄洪洞空蚀破坏;底板和侧墙的最大压强随上游水位升高和突扩宽度增大而减小,且泄洪洞沿程不存在负压区。
关 键 词: 水力学及河流动力学;突扩突跌;水翅;空腔;压强
Title: Model test research of hydraulic characteristics of spillway tunnel in middle chamber downstream with sudden lateral enlargement and vertical drop aerator
Author: WANG Chao, MA Xudong, DAI Guangqing, YANG Qing
Organization: Xi’an Land Water and Electricity Measurement and Control Co., Ltd.; State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University
Abstract: The hydraulic characteristics, cavities length and pressure characteristics of spillway tunnel in middle chamber downstream with sudden lateral enlargement and vertical drop aerator were studied through physical model test method. The experiment results showed that the water wing phenomenon of spillway tunnel caused by vertical drop and sudden lateral enlargement aerator could not be avoided. However, it could be reduced by optimizing the aerator type to avoid the spillway tunnel top wall being erosion. Moreover, the aerator could lengthen lateral cavity length and link the lateral cavity with the bottom cavity to prevent cavitation damage. With the upstream water level heightening and the width of lateral expansion increasing, the maximum pressure of floor and sidewall would decrease. Besides, there was no negative pressure zone existing along the spillway tunnel.
Key words: hydraulics and river dynamics; sudden lateral enlargement and vertical drop; water wing; cavity; pressure
发表期数: 2013年1月第2期
引用格式: 王超,马旭东,戴光清,等. 突扩突跌型中闸室下游泄洪洞水力特性试验研究[J]. 中国科技论文在线精品论文,2013,6(2):183-188.
 
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