泄洪洞中闸室出口侧墙掺气体型优化  

Shape Optimization of Sidewall Aerator at Middle Gate Chamber in Spillway Tunnel

作　　者：钟建[1,2] 杨庆[1,2] 张永清[3] 戴光清[1,2] 

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610072 [2]四川大学水利水电学院,四川成都610065 [3]中国电建集团成都勘测设计研究院有限公司,四川成都610072

出　　处：《水电能源科学》2016年第5期98-101,共4页Water Resources and Power

摘　　要：采用RNGκ-ε紊流模型对某中闸室出口侧墙掺气体型进行数值模拟,以水流流态、压力分布及水翅强度等水力特性为指标对侧墙体型进行优化,并利用物理模型试验对推荐体型进行验证。结果表明,渐扩体型存在掺气盲区;突扩体型水流流态差;突扩+渐扩体型能够同时满足侧掺气和改善水流流态,水翅强度随渐扩长度增加而减弱,并能形成稳定侧空腔且侧墙上无负压产生,能有效避免空化空蚀。RNGκ-εturbulence model was employed to simulate the hydraulic characteristics including flow pattern,pressure distribution and the intensity of water wing for the sidewall aerator at the outlet of middle gate chamber.And then the physical model test was used to verify the recommended size.The results show that the sidewall aerator with sudden enlargement and gradual expansion can both eliminate the unaerated area at the sidewall and improve the flow regime,the greater length of gradual expansion can weaken the intensity of water wing,and there is a stable cavity and no negative pressure at the sidewall.This aerator can avoid cavitation and erosion effectively.

关 键 词：侧墙掺气 突扩 渐扩 水翅强度 数值模拟 

分 类 号：TV135.2[水利工程—水力学及河流动力学]