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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。
The RNGκ-ε turbulence model was used to simulate the aeration type of the outlet wall of a middle sluice chamber. The body shape of the side wall was optimized by using hydraulic characteristics such as flow pattern, pressure distribution and fin strength. The physical model Test to verify the recommended body size. The results show that there is a blind zone in the gradually expanding body, the flow pattern of the sudden expansion body is poor, and the sudden expansion and gradually expanding body shape can both satisfy the side aeration and improve the fluid flow pattern. The fin strength decreases with the increasing of the expanding length The formation of a stable side of the cavity and no negative pressure on the side wall, can effectively prevent cavitation erosion.