双通道养殖池流态模拟及验证  

Numerical simulation and verification on flow-field distribution in 'Cornell-type' dual-drain culture tank

作　　者：俞国燕[1] 魏武[1] 王筱珍[1] 何真[1] 鄢奉林[1] 

机构地区：[1]广东海洋大学工程学院,广东湛江524088

出　　处：《渔业现代化》2012年第6期10-14,共5页Fishery Modernization

基　　金：广东省科技计划项目(2011B031200007;2010B020314005;2012B010300023;2011B020307007)

摘　　要：养殖池是循环水养殖中的关键设施,养殖池内水体的流态则是研究养殖池两相流的基础,并直接决定了养殖池的性能优劣。借助计算流体动力学软件包Fluent,采用标准模型和RNG模型分别对Cornell-type双通道养殖池进行数值模拟,得到养殖池内水体流场的速度分布。模拟结果表明,水体回转速度大小与养殖池中心的径向距离呈线性增长关系,池中心处速度最小,越远离池中心回转速度越大,靠近池壁处速度达到最大;同时通过实验数据对模拟结果进行了验证,对比结果分析表明,RNG模型比标准模型模拟效果相对较好,模拟结果也基本符合Cornell-type双通道养殖池的运行规律,这为养殖池的优化设计及结构改进提供了新的研究方法和手段。Cuhure tank is the critical equipment in the Recirculating aquaculture system （RAS）, and as the basis for further research on two-phase flow, flow-field distribution in culture tank determines performance of culture tank. With the help of computational fluid dynamics （CFD） software, the flow-field distribution in the culture tank was simulated and verified by using the standard k -ε model and RNG k -ε model, and get the velocity distribution of the flow field in culture tank . The results show that these velocities increased nearly linearly with radial distance from the tank center. Finally, by analyzed the simulation results and experimental datum, found that RNG k - ε model is better than the standard k - ε model on simulation results, and the simulation results are basically in agreement with the tank ＇s operation law, numerical simulation has provided a new research method and mean to optimal structure designing and improvement.

关 键 词：养殖池 数值模拟 CFD k-ε模型 RNGk-ε模型 

分 类 号：S955.1[农业科学—水产养殖]