摘要
为了分析在低浓度盐水条件下的河口船闸在不同进气压强和闸室盐度条件下的气幕防咸效果,基于CFD软件的VOF多相流模型和Realizable k-ε湍流模型建立船闸气幕防咸二维模型,对河口船闸不同进气压强和盐度下的气幕防咸过程进行了三相流模拟。模拟结果表明:船闸气幕防咸效果与气泡帷幕的进气压强有关,当水位为8 m,闸室盐度为2.5‰时,存在最佳进气压强使得船闸气幕防咸效果达到最优;当进气压强越接近最佳进气压强时,盐淡水交换率越低,气幕防咸系数越大,气幕防咸效果越好;最佳进气压强的大小与闸室盐度有关,闸室盐度越大,气幕最佳进气压强越大。当闸室盐度增加时,应及时提高进气压强以达到合理的阻咸效果。
To analyze the effect of mitigating salt instrusion of the air curtain of the estuarine ship lock under low concentration salt water conditions under different inlet pressures and the salinity of the lock chamber,a two-dimensional model of the air curtain for mitigating salt instrusion of the ship lock is established based on the VOF multiphase flow model and the Realizable k-εturbulence model of CFD software.The three-phase flow simulation of the air curtain for mitigating salt instrusion process under different inlet pressures and salinity of the estuarine lock is carried out.The simulation results show that the effect of mitigating salt instrusion of the ship lock air curtain is related to the inlet pressure of the bubble curtain.When the water level is 8 m and the salinity of the lock chamber is 2.5‰,there is an optimal inlet pressure that maximizes the effect of mitigating salt instrusion of the ship lock air curtain;When the inlet pressure is closer to the optimal inlet pressure,the exchange rate of saltwater and freshwater is lower,the mitigating salt instrusion coefficient of the air curtain is larger,and the effect of mitigating salt instrusion of the air curtain is better.The optimal inlet pressure is related to the salinity of the chamber,and the higher the salinity of the chamber,the greater the optimal inlet pressure of the air curtain.When the salinity of the lock chamber increases,the inlet pressure should be increased in time to achieve a reasonable effect of mitigating salt instrusion.
作者
宋宏宇
高成岩
胡江
李瑶
SONG Hongyu;GAO Chengyan;HU Jiang;LI Yao(National Inland Waterway Rehabilitation Engineering and Technology Research Center,Chongqing Jiaotong University,Chongqing 400074,China;CCCC Water Transportation Consultants Co.,Ltd.,Beijing 100007,China)
出处
《水运工程》
2025年第11期135-144,共10页
Port & Waterway Engineering
基金
大型运河工程水生态安全保障技术与示范项目(2023YFC3208800)。
关键词
河口船闸
防咸效果
气泡帷幕
数值模拟
estuarine ship lock
effect of mitigating salt instrusion
air curtain
numerical simulation
