排灌机械工程学报
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排灌机械工程学报  2019, Vol. 37 Issue (8): 686-691    DOI: 10.3969/j.issn.1674-8530.19.0015
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阶梯凸起数量对一体化消能工水力特性的影响
陈卫星1,杨具瑞1*,董丽艳1,吴欧俣2,李书曌3
1. 昆明理工大学现代农业工程学院, 云南 昆明 650500; 2. 昆明理工大学建筑工程学院, 云南 昆明 650500; 3. 东莞市水利勘测设计院有限公司, 广东 东莞 523000
Effect of number of raised ladder on the hydraulic characteristics of integrated energy dissipator
CHEN Weixing1, YANG Jurui1*, DONG Liyan1, WU Ouyu2, LI Shuzhao3
1. Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; 2. Faculty of Architectural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; 3. Dongguan Water Resources Survey and Design Institute Co., Ltd., Dongguan, Guangdong 523000, China
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摘要 基于阿海水电站5孔溢流表孔,在掺气坎高度1 m、角度10°的条件下,对Y型宽尾墩+阶梯溢流坝+消力池一体化消能工进行阶梯凸起数量分别为0,1,2,3的4种过渡阶梯进行水工模型试验,分别从水流流态、消力池水面线、近底流速、负压、时均压强以及消能率等多个水力特性进行研究.研究结果表明,近底流速随着可掺气空腔体积的增大而减小,随着阶梯凸起数量的减少而增大,在二者相互作用下,各方案流速在消力池末端达到最小,其中方案2流速最小,为22.23 m/s;由于可掺气空腔体积和凸起型阶梯的数量的共同影响,方案2的负压最小,达-33.66 kPa;方案1,2,3,4的消能率依次为59.56%,61.06%,60.37%,59.99%.方案2的消能率最高.
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陈卫星
杨具瑞*
董丽艳
吴欧俣
李书曌
关键词凸起型阶梯   阶梯溢流坝   流速   负压   消能率     
Abstract: The transitional ladder has a certain influence on the integrated energy dissipation mode of flaring gate piers, stepped spillways and stilling basins, and raised ladder is particularly important for this effect. The study presents a numerical simulation on the 5-hole transitional ladder design for the spillway of Ahai hydropower station. With an aerator height of 1m at an angle of 10? for the flaring gate piers combined with stepped spillway and stilling basin, the hydraulic model test was carried out for the four kinds of transition steps with the number of raised ladder 0, 1, 2, 3 respectively. Various hydraulic characteristics such as the surface line of the stilling pool, the near-bottom flow velocity, the negative pressure, the time-averaged pressure and the energy dissipation rate were studied.The study found that: The near-bottom flow velocity decreases with the increase of the volume of the aerated ca-vity, and increases with the decrease of the number of stepped protrusions. Under the interaction of the two, the flow velocity of each solution reaches the minimum at the end of the stilling pool, the flow velocity of model 2 is the smallest, 22.23 m/s; Owing to the collective effect between the volume of the aerated cavity with the number of raised ladder, the negative pressure of model 2 is the smallest, reaching -33.66 kPa; The energy-dissipating rates of models 1, 2, 3 and 4 are in turn 59.56%, 61.06%, 60.37% and 59.99%, respectively. The energy dissipation rate of model 2 is the highest.
Key wordsraised ladder   stepped spillways   flow velocity   negative pressure   energy dissipation rate   
收稿日期: 2019-01-29;
基金资助:国家自然科学基金资助项目(51569010)第一作者简介:陈卫星(1994—),男,安徽合肥人,硕士研究生(baymaxcwx@163com),主要从事工程水力学、计算流体力学研究
引用本文:   
陈卫星,杨具瑞*,董丽艳等. 阶梯凸起数量对一体化消能工水力特性的影响[J]. 排灌机械工程学报, 2019, 37(8): 686-691.
CHEN Wei-Xing-,YANG Ju-Rui-*,DONG Li-Yan- et al. Effect of number of raised ladder on the hydraulic characteristics of integrated energy dissipator[J]. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(8): 686-691.
 
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