基于数值模拟的溢洪道水流沿程变化与护坡高度合理性分析  

Analysis of the change of spillway flow edge and the rationalityof slope protection height based on numerical simulation

作　　者：李勇 李松平 杨炬敏 袁吉娜 刘洁[6] LI Yong;LI Songping;YANG Jumin;YUAN Jina;LIU Jie(Henan Hechuan Engineering Supervision Co.,Ltd,Zhengzhou 450047,China;Henan Key Laboratory of Safety Technology for Water Conservancy Project,Zhengzhou 450003,China;Henan Provincial Water Conservancy Technology Application Center,Zhengzhou 450003,China;Lingbao City Zhaikou Water Authority,Lingbao 472599,China;Henan Keyuan Water Conservancy Construction Engineering Testing Co.,Ltd,Zhengzhou 450003,China;Huanghe Science and Techology University,Zhengzhou 450063,China)

机构地区：[1]河南省河川工程监理有限公司,郑州450047 [2]河南省水利工程安全技术重点实验室,郑州450003 [3]河南省水利科技应用中心,郑州450003 [4]灵宝市窄口水务管理局,河南灵宝472599 [5]河南科源水利建设工程检测有限公司,郑州450003 [6]黄河科技学院,郑州450063

出　　处：《南水北调与水利科技（中英文）》2024年第2期399-408,共10页South-to-North Water Transfers and Water Science & Technology

基　　金：国家自然科学基金项目(51879115);河南省科技厅软科学研究项目(232400411122)。

摘　　要：为研究溢洪道水力特性,验证工程设计方案合理性。基于SolidWorks软件建立溢洪道三维数值模型,使用Fluent软件,运用VOF方法和RNG k-ε湍流模型闭合N-S方程,对沟水坡水库溢洪道进行数值模拟。通过数值模拟得到的溢洪道水力特性数据与物理模型试验结果进行分析对比,并进一步分析溢洪道水流沿程变化规律,研究表明数值模型的可信度较高,可采用数值仿真方法对溢洪道结构进行优化。同时发现在30 a一遇洪水工况下溢洪道混凝土护坡高度不能满足正常泄洪的问题,提出在斜坡段设置两级水垫塘、加高消力池段护坡高度和缩短尾水渠长度的优化方案;利用数值模拟,分析验证了优化方案的可行性,为工程设计优化提供依据。研究成果为同类溢洪道工程采用数值仿真模拟提供了技术支撑。The spillway is an important structure to ensure the safe discharge of the reservoir and the safe operation of the dam body.In order to ensure the safe operation of the spillway,the hydraulic characteristics of the spillway of the Goushuipo Reservoir reinforcement project were tested and studied,and the engineering design was validated and optimized.Based on SolidWorks software,the three-dimensional numerical model of the spillway of the Goushuipo Reservoir was established by the VOF method,and the closed N-S equation of RNG k-εturbulence model were used to simulate the spillway of the Goushuipo Reservoir reinforcement project by Fluent software.Based on the conditions of 30-year flood and 50-year flood,the data of spillway water surface line simulated by mathematical model was slightly different from that measured by physical model only in the silting pool,and the maximum deviation of water surface line was 9.2%.Using numerical simulation method to correct and simulate the original design scheme had higher simulation accuracy and reliability.The relation function of water level and discharge was established,and the variation law of water flow along the spillway was analyzed.Under the design conditions,the flood level of the stilling pool and the tail channel of the reservoir exceeded the top of the slope protection.The reason why the concrete slope protection height of the spillway could not meet the normal flood discharge under the 30-year flood condition of the Goushuipo reservoir reinforcement project was deeply analyzed.An optimization scheme was proposed to set two-stage water mat in the slope section of the reservoir, increase the slope protection height of the silencing pool section and shorten thelength of the tail channel. The numerical simulation results showed that the rhomboid flow in the slope section ofthe spillway was destroyed, and the discharging energy of part of the flow was reduced. After the flood enters thesilencing pool, the rolling degree of the flow was weakened, the flow state was rela

关 键 词：数值模拟 溢洪道 水面线 护坡高度 优化方案 

分 类 号：TV131.61[水利工程—水力学及河流动力学]