相对弧宽比对双通道方形养殖池的流场优化研究

张倩; 桂劲松; 任效忠; 薛博茹; 毕春伟; 刘鹰

doi:10.12131/20210044

相对弧宽比对双通道方形养殖池的流场优化研究

doi: 10.12131/20210044

张倩^{1, 2,},
桂劲松²,
任效忠^1, ,,
薛博茹^{1, 2},
毕春伟³,
刘鹰¹

1.
设施渔业教育部重点实验室 (大连海洋大学)，辽宁大连 116023
2.
大连海洋大学海洋与土木工程学院，辽宁大连 116023
3.
大连理工大学/海岸和近海工程国家重点实验室，辽宁大连 116024

基金项目: 国家自然科学基金面上项目 (31872609)；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项目 (2019B020215001)

详细信息

作者简介:
张倩：张　倩 (1996—)，女，硕士研究生，研究方向为工程水动力学。E-mail: zhangqian4924@163.com

通讯作者:
任效忠 (1981—)，男，教授，博士，从事工程水动力学研究及工程设计。E-mail: renxiaozhong@dlou.edu.cn

中图分类号: S 955.1
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- 文章访问数: 676
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- 被引次数: 0
出版历程
- 收稿日期: 2021-01-22
- 修回日期: 2021-11-22
- 录用日期: 2021-11-29
- 网络出版日期: 2021-12-16
- 刊出日期: 2022-08-05

Optimization of flow field in dual-drain square aquaculture tank with relative arc to width ratio

ZHANG Qian^{1, 2
,},
GUI Jinsong²,
REN Xiaozhong^{1
, ,},
XUE Boru^{1, 2},
BI Chunwei³,
LIU Ying¹

1.
Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University), Ministry of Education, Dalian 116023, China
2.
College of Ocean and Civil Engineering, Dalian Ocean University, Dalian 116023, China
3.
Dalian University of Technology/State Key Laboratory of Coastal and Offshore Engineering, Dalian 116024, China

摘要

摘要: 为改善双通道方形养殖池内流场特性，通过研究圆弧角和直边的池壁组合方式对其进行流场优化，从而为循环水养殖产业提供更好的养殖装备。利用计算流体力学技术对双通道养殖池内流场进行三维数值模拟，通过对修正速度v₀和均匀系数UC₅₀的分析，评估了相对弧宽比 (R/B，R为圆弧角半径，B为池壁边长) 对池内流场特性的影响。结果表明，不同的底流分流比 (养殖池底部中心排水口的出流流量占总体出流流量的百分比) 工况均呈现相同规律，即在相同的水体交换率下，0.2≤R/B<0.4的方形圆弧角养殖池的平均流速大约为方形养殖池的2倍，而与圆形养殖池相比无明显差异；且在流场均匀性分析中发现，0.2≤R/B<0.4的方形圆弧角养殖池均匀系数较高，甚至优于圆形养殖池的流态。研究表明，方形圆弧角养殖池的圆弧角可有效缩小方形养殖池中直角所导致的低流速区域面积，且保留了较高的空间利用率。方形圆弧角养殖池结合了方形养殖池和圆形养殖池的优势，可较好地解决双通道方形养殖池内流态不佳的问题，具有良好的产业推广及应用价值。
- 相对弧宽比 /
- 双通道 /
- 方形圆弧角养殖池 /
- 流场特性 /
- 计算流体力学
Abstract: In order to improve the flow field characteristics in dual-drain square aquaculture tank, we combined arc angle and straight edge to optimize the flow field, so as to provide better aquaculture equipment for the recirculating aquaculture industry. We applied computational fluid dynamics technology to simulate the flow field in dual-drain aquaculture tanks, and evaluated the effect of relative arc to width ratio (R/B, R is the radius of arc angle, B is the side length of tank wall) on the flow field characteristics in the tanks by analyzing corrected velocity v₀ and uniformity coefficient UC₅₀. The results show a same rule under different conditions of underflow split ratio (The percentage of outflow from the center outlet at the bottom of the tank in the total outflow). The average velocity in the square arc angle aquaculture tanks with 0.2≤R/B<0.4 was about twice than that in the square aquaculture tanks for the same water exchange rate, but there was no significant difference compared with the circular aquaculture tanks. According to the analysis of flow field uniformity, the square arc angle aquaculture tanks with 0.2≤R/B<0.4 had higher uniformity coefficient, and even higher than that of circular aquaculture tanks. The research indicates that the area of lower velocity caused by the right angle in the square aquaculture tanks reduced effectively by the arc angle in the square arc angle aquaculture tanks, and higher space utilization rate was retained. The advantages of the square aquaculture tank and the circular aquaculture tank are fully combined in the square arc angle aquaculture tank, which solves the problem of poor flow pattern in dual-drain square aquaculture tank, with good industrial popularization and application value.
- Relative arc to width ratio /
- Dual-drain /
- Square arc angle aquaculture tank /
- Flow field characteristics /
- Computational fluid dynamics

HTML全文

图 1 Cornell式双通道圆形养殖池模型

注：6个进水口自上而下排列，前4个向左弯曲45°，第5个向下弯曲45°，第6个保持水平进水。

Figure 1. Schematic diagram of 'Cornell -type' dual-drain circular tank model

Note: The six water inlets were arranged from top to bottom. The first four were bent 45 ° to the left, the fifth was bent 45 ° downward, and the sixth kept horizontal inflow.

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图 2 流速对比图

Figure 2. Comparison of velocity variation

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图 3 模型示意图

Figure 3. Schematic diagram of model

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图 4 网格划分示意图

Figure 4. Schematic diagram of meshing

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图 5 两种不同数量的网格计算结果对比

Figure 5. Comparison of two meshes with different quantity

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图 6 修正速度随相对弧宽比的变化趋势

Figure 6. Variation of v₀ with R/B

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图 7 测点分布示意图

Figure 7. Schematic diagram of measurement point distribution

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图 8 UC₅₀随R/B的变化趋势

Figure 8. Variation of UC₅₀ with R/B

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图 9 速度分布云图

Figure 9. Contour maps of velocity magnitudes

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