基于CFD的刚性养殖网衣流场数值模拟及不确定度分析

doi:10.14012/j.cnki.fjsc.2023.03.005

渔业研究 ›› 2023, Vol. 45 ›› Issue (3): 254-262.DOI: 10.14012/j.cnki.fjsc.2023.03.005

基于CFD的刚性养殖网衣流场数值模拟及不确定度分析

张为¹(), 郭军¹^,^*(), 扈喆¹, 张晓莹¹, 丁兰²

1.集美大学轮机工程学院,福建厦门 361021
2.福建省水产研究所,福建省海洋生物增养殖与高值化利用重点实验室,福建厦门361013

收稿日期:2022-11-01 出版日期:2023-06-25 发布日期:2023-06-16
通讯作者: 郭军
作者简介:张为(1999—),男,硕士研究生,研究方向:养殖装备设计与开发。E-mail:986357095@qq.com
基金资助:
福建省海洋生物增养殖与高值化利用重点实验室开放课题资助项目(2020fjscq08)

Numerical simulation and uncertainty analysis of the flow field of the rigid aquaculture panel net based on CFD

ZHANG Wei¹(), GUO Jun¹^,^*(), HU Zhe¹, ZHANG Xiaoying¹, DING Lan²

1. School of Marine Engineering,Jimei University,Xiamen 361021,China
2. Key Laboratory of Cultivation and High-value Utilization of Marine Organisms in Fujian Province, Fisheries Research Institute of Fujian,Xiamen 361013,China

Received:2022-11-01 Online:2023-06-25 Published:2023-06-16
Contact: GUO Jun

摘要/Abstract

摘要：

养殖网箱内的流体速度跟鱼类的生长密切相关。为研究养殖网衣周围的流场特性,本文针对一种平面刚性网衣,基于CFD理论,采用多孔介质模型,对单片网衣的流场进行了数值模拟,首先进行数值不确定度分析,再对不同流速和不同攻角下的网衣流场进行数值计算,并与试验结果进行对比,最后对网衣的流场特性进行分析。结果显示:本文网衣阻力和升力的计算结果与试验结果吻合良好,表明本文方法可以准确地预报网衣受力及周围流场;在网衣周围,流体速度下降较快,在超过一定长度后,流体速度变化趋于缓慢;随着来流速度的增加,网衣对水流的阻挡作用逐渐减弱。本文数值模拟方法可用于养殖网箱流场的数值模拟,具有一定的学术研究和工程实用价值。

关键词: 刚性网衣, 流场, 计算流体力学, 数值模拟, 不确定度分析

Abstract:

The velocity of fluid in the aquaculture cage is closely related to the growth of fish.In order to study the characteristics of the flow field around the aquaculture plane net,the flow field of a rigid plane net was simulated numerically based on CFD theory and by using the porous media model.Firstly,the uncertainty analysis of the flow field was carried out,and then the numerical calculations were carried out in the plane net at different angles and velocity,and the results were compared with the experimental results.The results showed that the calculation results of the resistance and the lift of the plane net were consistent with the experimental results,which indicated that the method can accurately predict the force of the plane net and the flow field around the plane net.The velocity of the fluid near the net decreased quickly,then after a certain length the velocity of the fluid changed slowly.The blocking effect of the plane net on the flow gradually decreased when the velocity of the flow increased.The numerical simulation method in this paper could be used to simulate the flow field of the plane net,which had some academic research value and engineering practical value.

Key words: rigid panel net, flow field, computational fluid dynamics, numerical simulation, uncertainty analysis

中图分类号:

O352

张为, 郭军, 扈喆, 张晓莹, 丁兰. 基于CFD的刚性养殖网衣流场数值模拟及不确定度分析[J]. 渔业研究, 2023, 45(3): 254-262.

ZHANG Wei, GUO Jun, HU Zhe, ZHANG Xiaoying, DING Lan. Numerical simulation and uncertainty analysis of the flow field of the rigid aquaculture panel net based on CFD[J]. Journal of Fisheries Research, 2023, 45(3): 254-262.

图/表 14

图1 网衣攻角示意图

Fig.1 Schematic diagram of the attack angle of the net panel

表1 网衣的尺寸

Tab.1 The size of the net panel

名称Name	参数Parameter
网衣长度/m Net panel length	1.0
网衣宽度/m Net panel width	1.0
网线直径/mm Net line diameter	2.8
网目长度/mm Net mesh length	29.0
网衣密实度Net panel compactness	0.198
网衣材质Net panel material	尼龙
网衣类型Net panel type	无节网

图2 网衣布置示意图

Fig.2 Schematic diagram of the arrangement of the net panel

图3 计算域和边界条件

Fig.3 Computational domain and boundary conditions

图4 计算域网格

Fig.4 Computational domain mesh

表2 网格的计算结果

Tab.2 The calculation results of mesh

名称 Name	网格尺寸/m Mesh size	网格数量/×10⁴ Mesh number
网格1 Mesh 1	0.100	31.7
网格2 Mesh 2	0.142	12.2
网格3 Mesh 3	0.200	4.4

图5 不同网格尺寸下的网衣阻力收敛曲线

Fig.5 Convergence curves of the net panel resistance at different mesh sizes

图6 不同速度下的网衣阻力计算值与试验值对比

Fig.6 Comparison of the calculated and experimental resistance values at different velocities

图7 不同流速下的速度分布

Fig.7 Velocity distribution at different flow velocities

图8 不同流速下网衣中心前后的速度分布

Fig.8 Velocity distribution before and after the center of the net at different flow velocities

图9 不同攻角下的网衣阻力计算值与试验值对比

Fig.9 Comparison of the calculated and experimental resistance values at different angles of attack

图10 不同攻角下的网衣升力计算值与试验值对比

Fig.10 Comparison of the calculated andexperimental lift values at different angles of attack

图11 不同攻角下的速度分布

Fig.11 Velocity distribution at different angles of attack

图12 不同攻角下网衣中心前后的速度分布

Fig.12 Velocity distribution before and after the center of the net at different angles of attack

参考文献 14

[1]	蔡文鸿, 郑国富, 姚桂祥, 等. 湾外底层水域网箱养殖浮式自动投饵系统设计与初步试验[J]. 渔业研究, 2021, 43(3):257-267.
[2]	张哲, 郑国富, 朱健康, 等. 港湾海域新型网箱养鲍新技术探讨[J]. 渔业研究, 2016, 38(6):486-492.
[3]	洪万树, 刘家富, 郑炜强, 等. 浅论我国大黄鱼产业转型升级之对策[J]. 渔业研究, 2018, 40(4):315-323.
[4]	黄永强. “云龙石斑鱼”深海网箱养殖试验[J]. 渔业研究, 2021, 43(4):410-418. DOI
[5]	桂福坤. 深水重力式网箱水动力学特性研究[D]. 大连: 大连理工大学, 2006.
[6]	Patursson O. Flow through and around fish farming nets[D]. Durham: University of New Hampshire, 2008.
[7]	Patursson O, Swift M R, Tsukrov I, et al. Development of a porous media model with application to flow through and around a net panel[J]. Ocean Engineering, 2010, 37:314-324. DOI URL
[8]	赵云鹏, 刘兴, 董国海. 单片网衣周围流场特性的数值模拟[J]. 中国科技论文, 2010, 5(7):557-562.
[9]	Zhao Y P, Bi C W, Dong G H, et al. Numerical simulation of the flow around fishing panel nets using the porous media model[J]. Ocean Engineering, 2013, 62:25-37. DOI URL
[10]	刘兴. 水流作用下平面网衣周围流场特性的数值模拟[D]. 大连: 大连理工大学, 2011.
[11]	刘春宏, 刘长根, 董娇娇, 等. 基于多孔介质模型的养殖网箱周围流场特性研究[J]. 应用力学学报, 2022, 39(1):176-185.
[12]	王福军. 计算流体动力学分析CFD——软件原理与应用[M]. 北京: 清华大学出版社, 2004.
[13]	Bi C W, Zhao Y P, Dong G H, et al. Numerical simulation of the interaction between flow and flexible nets[J]. Journal of Fluids and Structures, 2014, 45:180-201. DOI URL
[14]	ITTC.Uncertainty analysis in CFD verification and validation,methodology and procedures[C]//ITTC.28th International Towing Tank Conference. Wuxi: China Ship Scientific Research Center, 2017.

基于CFD的刚性养殖网衣流场数值模拟及不确定度分析

Numerical simulation and uncertainty analysis of the flow field of the rigid aquaculture panel net based on CFD

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