| 导流盘对循环水养殖池水动力特性的影响 |
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| 引用本文： | 陈聪聪,张俊,刘兴国,高阳,张宁.导流盘对循环水养殖池水动力特性的影响[J].上海海洋大学学报,2023,32(5):978-985. |
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| 作者姓名： | 陈聪聪 张俊 刘兴国 高阳 张宁 |
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| 作者单位： | 上海海洋大学,上海海洋大学,上海海洋大学,中国水产科学研究院渔业机械仪器研究所,上海海洋大学 |
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| 基金项目： | 上海市科技兴农项目（沪农科推字2021第3-1号）；上海市水产动物良种创制与绿色养殖协同创新中心项目（项目编号：2021科技02-12）；上海市崇明区农业科创项目(编号2021CNKC-05-06) |
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| 摘 要： | 为提高循环水养殖系统的集污自净化效能，设计了一种带导流盘的正八边形养殖池结构。建立了三维非定常流场数值计算模型，在验证计算方法有效性的基础上，研究了导流盘的几何参数和位置对流速分布、涡量强度、壁面剪切应力和水体混合均匀性等水动力特性影响。结果表明：在导流盘直径与养殖池宽度之比一定时，随着导流盘高度增加，流场中心涡柱呈先减小后增大趋势, 涡环数呈先减小再增加趋势，其形状从不规则逐渐发展成环状结构；在同一高度下，随着导流盘直径与养殖池宽度之比增大，涡柱呈先增大后减小趋势, 涡环的数量先增加后基本保持不变；导流盘安装在距池底20~40 mm，直径与养殖池宽度之比为0.05~0.08时，有助于增大养殖池底流口附近的速度梯度，减小养殖池壁面与水体的碰撞，提高涡流强度和水力混合均匀性；有利于形成颗粒物聚集和排出的水动力条件。
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| 关 键 词： | 循环水养殖池系统 正八边形 导流盘 水动力学 自净化效能 |
| 收稿时间： | 2023/6/15 0:00:00 |
| 修稿时间： | 2023/8/11 0:00:00 |
Hydrodynamic characteristics in a recirculating aquaculture tank with different deflectors |
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| CHEN Congcong,ZHANG Jun,LIU Xingguo,GAO Yang,ZHANG Ning.Hydrodynamic characteristics in a recirculating aquaculture tank with different deflectors[J].Journal of Shanghai Ocean University,2023,32(5):978-985. |
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| Authors: | CHEN Congcong ZHANG Jun LIU Xingguo GAO Yang ZHANG Ning |
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| Institution: | Shanghai Ocean University,Shanghai Ocean University,Shanghai Ocean University,Institute of Fisheries Machinery and Instruments, China Academy of Fisheries Science,Shanghai Ocean University |
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| Abstract: | To enhance the effectiveness of pollution collection and self-purification within a circulating water aquaculture system, a positively designed octagonal aquaculture tank structure with a flow-guide disc was developed. A three-dimensional non-constant flow field numerical calculation model was established. Based on the validation of the calculation method, this study investigated the impact of geometric parameters and the positioning of flow-guide discs on hydrodynamic traits, including flow velocity distribution, vortex strength, wall shear stress, and water body mixing uniformity. The findings indicate that, while keeping the ratio of flow-guide disc diameter to pond width constant, elevating the flow-guide disc height yields a pattern of diminishing and then augmenting vortex columns at the center of the flow field. Additionally, the number of vortex rings displays a similar tendency, transitioning from decrease to increase and gradually evolving into an annular configuration from its irregular shape. Similarly, at the same height, raising the ratio of flow-guide disc diameter to pond width leads to an initial growth and subsequent reduction in the vortex column, while the count of vortex rings experiences a growth followed by a relatively stable phase. This initial growth in vortex rings is followed by a largely consistent state. By situating the flow-guide discs 20~40 mm above the pool bottom and maintaining a pool width-to-diameter ratio of 0.05~0.08, an amplified velocity gradient close to the pool''s base can be achieved. Furthermore, this installation reduces collisions between the pool wall surface and the water body, enhancing vortex strength and promoting uniform hydraulic mixing. This configuration fosters the necessary hydrodynamic conditions for the aggregation and expulsion of particulate matter. |
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| Keywords: | Recirculating water culture pond system Positive octagon Guide plate Hydrodynamics Self-purification efficiency |
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