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Effect of jet angle of straight wall double pipe structure on flow field of square arc angle aquaculture tank

  

  1. (1 College of Fisheries and life, Dalian Ocean University, Dalian 116023, China;
    2 Key Laboratory of Environment Controlled Aquaculture, Ministry of Education, Dalian 116023, China;
    3 College of Ocean and Civil Engineering, Dalian Ocean University, Dalian 116023, China;
    4 College of Marine Technology and Environment ,Dalian Ocean University, Dalian 116023, China;
    5 State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China)
  • Online:2021-06-20 Published:2021-09-15

直壁双管结构射流角度对方形圆弧角养殖池流场的影响研究

  1. （1大连海洋大学水产与生命学院，辽宁大连116023；
    2设施渔业教育部重点实验室，辽宁大连116023；
    3 大连海洋大学海洋与土木工程学院，辽宁大连116023；
    4大连海洋大学海洋科技与环境学院，辽宁大连116023；
    5大连理工大学海岸与近海工程国家重点实验室，辽宁大连116023）
  • 通讯作者: 任效忠（1981—），男，博士，副研究员，研究方向：工程水动力学及工程设计。E-mail：renxiaozhong@dlou.edu.cn
  • 作者简介:胡艺萱（1997—），女，硕士研究生，研究方向：养殖工程水动力学。E-mail：18042728623@163.com
  • 基金资助:
    国家自然科学基金面上项目（31872609）；国家重点研发计划项目（2017YFD0701701）；南方海洋科学与工程广东省实验室（广州）人才团队引进重大专项（GML2019ZD0402）；广东省重点领域研发计划（2019B020215001）

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Abstract: In order to improve the hydrodynamic conditions of aquaculture tank and reduce the energy consumption of industrial recirculating aquaculture, a three-dimensional numerical calculation model of aquaculture tank with water inlet on straight wall double pipe (two inlet pipes arranged in the middle of two non-adjacent straight walls) was established by using computational fluid dynamics (CFD) technology, and the flow field characteristics in the square arc angle aquaculture tank with different jet angles were simulated numerically. The results show that the jet angle has obvious influence on the average velocity and the uniformity of flow field distribution in the aquaculture tank. Under the same cycle number setting condition, when the jet angle is between 0 ° and 10 °, it is conducive to obtain higher water velocity and more uniform flow field. Especially when the jet angle is 0 °, the effect is the best, and the flow field characteristics in the aquaculture tank are better than those under other working conditions, which can meet the needs of reducing the energy consumption of aquaculture and constructing a suitable flow field for breeding creatures. This study can provide a reference for the design and construction of flow field in the industrial recirculating aquaculture system.

Key words: inlet system, jet angle, rectangular arc angle aquaculture tank, flow field characteristics, computational fluid dynamics

摘要： 为改善水产养殖池内的水动力条件，同时兼顾降低工厂化循环水养殖的能源消耗，采用计算流体力学（Computational Fluid Dynamics，CFD）技术，建立对直双管（两个进水管布设于不相邻的两个直壁中间位置）入流的养殖池三维数值计算模型，对不同射流角度的方形圆弧角养殖池内流场特性开展数值模拟。结果显示：射流角度对养殖池内平均流速和流场分布均匀性的影响明显；在同一循环次数设定条件下，当射流角度在0°~10°区间，有利于获得更高的水体流速和更均匀的流场，尤其以射流角度为0°时效果最优，养殖池内流场特性总体上优于其他工况，满足降低养殖能耗与兼顾营造养殖生物所需适宜流场的需求。本研究可为工厂化循环水养殖系统流场的设计营造提供参考。

关键词: 进水系统, 射流角度, 矩形圆弧角养殖池, 流场特性, 计算流体力学