俄垤水库扩建工程溢洪道消能减蚀模型试验研究  

Model Test Study on Energy Dissipation and Erosion Mitigation of Spillways in Expansion Project of Edie Reservoir

作　　者：何志亚 冷月华 向鹏鹏 刘文超 姚志军 HE Zhiya;LENG Yuehua;XIANG Pengpeng;LIU Wenchao;YAO Zhijun(Honghe Water Conservancy and Hydropower Survey and Design Institute of Yunnan Province, Mengzi 661100, China;State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;SDIC Dachaoshan, Kunming 650000, China)

机构地区：[1]云南省红河州水利水电勘察设计研究院,云南蒙自661100 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [3]国投云南大朝山水电有限公司,云南昆明650000

出　　处：《水电与新能源》2021年第12期64-68,共5页Hydropower and New Energy

基　　金：国家自然科学基金资助项目(编号:50809052)。

摘　　要：俄垤水库扩建工程溢洪道水头落差大,泄槽Ⅱ段产生负压及不满足初生空化数要求的断面较多,泄槽内高速水流直冲消力池尾坎,水流越过消力池边墙,池内流态较差。为了防止泄槽段空化空蚀的发生和安全泄洪,经反复试验,推荐在泄槽底部设置掺气挑坎、两侧边墙设通气槽的组合方式掺气,所有测点均能满足空化数要求,掺气减蚀效果明显,综合式消力池显著壅高池内水深,改善了流态。In the expansion project of Edie Reservoir,the water head drop of spillways is quite large.In the preliminary design scheme,there are many sections in the partⅡof the spillway chute are of negative pressure or unqualified incipient cavitation number.The high-speed water in the spillway chute flows directly to the tail sill and overflows the side wall of the stilling basin,causing a poor flow regime in the stilling basin.To prevent the cavitation erosion of the spillway chute and ensure the safe operation of the stilling basin during the flood discharging process,a combined aeration scheme is recommended based on model test study,in which aeration sills are set at the bottom of the spillway chute and aeration grooves are set on both sides of the sidewalls.With this scheme,obvious erosion mitigation effect can be obtained as all measurement points can meet the requirements of cavitation number.The comprehensive stilling basin significantly increases the water depth and improves the flow regime.

关 键 词：溢洪道 掺气减蚀 消能 模型试验 

分 类 号：TV651.1[水利工程—水利水电工程]