变坡溢洪道模型试验及数值研究  

Model Tests and Numerical Study on the Hydraulics of Spillway with Variable Slope

作　　者：李秋林[1] 李连侠[1] 廖华胜 刘德伟[1] 魏晶晶[1] 沈焕荣[1] 易文敏[1] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610041 [2]Michigan State University,East Lansing 48824-1226,USA

出　　处：《水力发电》2017年第5期56-59,共4页Water Power

基　　金：国家自然科学基金资助项目(51079091)

摘　　要：变坡溢洪道内水流流态和衔接形式复杂,为论证该溢洪道设计的合理性,采用物理模型试验和三维紊流数值模拟相结合的方法,对流态、水面线、流速、压力及空化特性等水力学参数进行对比分析,进而对进口体型、堰面曲线及陡坡变缓坡等设计进行了评价。试验结果和数值计算结果吻合良好,表明溢洪道进口流态良好,进水顺畅,无壅水跌水情况,且堰面未出现负压,说明溢洪道进口形状和堰型选择合理;溢洪道各段内水面衔接光滑,流速分布合理,底板各处空化特性良好,说明溢洪道底坡设计合理。The flow pattern and connection form of spillway with variable slope are more complicated, in order to prove the rationality of spillway design, the physical model tests and three-dimensional turbulent flow numerical value are used to simulate the spillway. The water surface line, velocity, pressure and cavitation characteristics are compared and analyzed, and then the design of imported body shape, weir curve and steep slope gradient are evaluated. The results show that： （a） the spillway inlet flow pattern is good, the water flow is smooth, and no backwater or water drop occurs, and the weir surface does not appear negative pressure, which indicates that the spillway inlet shape and weir type selection are reasonable; and （b） the sections of water interface are smoothly connected, the velocity distribution is reasonable, and the cavitation characteristics of floor are good, which indicates that the design of bottom slope of spillway is reasonable.

关 键 词：溢洪道 变坡 模型试验 数值模拟 

分 类 号：TV651.12[水利工程—水利水电工程]