基于VOF模型溢洪道掺气槽位置数值模拟  

Numerical Simulation of Spillway Aerator Position Based on VOF Model

作　　者：周凯 牧振伟[1,2] 张红红 ZHOU Kai;MU Zhen-wei;ZHANG Hong-hong(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention,Urumqi 830052,China)

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]新疆水利工程安全与水灾害防治重点实验室,新疆乌鲁木齐830052

出　　处：《水电能源科学》2023年第3期108-111,185,共5页Water Resources and Power

基　　金：国家自然科学基金项目(51769037);新疆维吾尔自治区高校科研计划创新团队项目(XJEDU2017T004)。

摘　　要：为解决高水头溢洪道空蚀破坏问题,设计了3种方案,分别在桩号0+130.73、0+161.78、0+186.39处加设掺气槽,其对应的弗劳德数Fr分别为6.65、7.91、8.53,并采用RNGκ-ε紊流模型和物理模型试验的方法,分析易发生空蚀破坏断面的掺气浓度及沿程水流空化数指标。结果表明,在桩号0+186.39处加设掺气槽,在易发生空蚀破坏截面临底掺气浓度大于15%,沿程水流空化数均大于0.3,效果优于其他2种方案,可有效解决溢洪道空蚀破坏问题。In order to solve the cavitation damage problem of the spillway with high head, three schemes were proposed. The aeration tank was added at pile number 0+130.73, 0+161.78 and 0+186.39, respectively, and the corresponding Fr was 6.65, 7.91 and 8.53. By means of RNG κ-ε turbulence model and physical model test, the aeration concentration and cavitation number indexes of the section prone to cavitation erosion were analyzed. The results show that the effect of adding aerator at pile 0+186.39 is better than the other two schemes, and the bottom aeration concentration is above 15% and the flow cavitation number is greater than 0.3 in the section prone to cavitation erosion, the cavitation failure problem in the drainage channel section can be effectively solved.

关 键 词：溢洪道 掺气槽位置 VOF模型 弗劳德数Fr 掺气浓度分布 

分 类 号：TV131.6[水利工程—水力学及河流动力学]