方型组合礁体流场效应及水动力分析  

Flow Field Effects and Hydrodynamic Analysis of Square Composite Reefs

作　　者：林明健 季新然 王凤霞[3] Lin Mingjian;Ji Xinran;Wang Fengxia(School of Civil Engineering and Architecture,Hainan University,Haikou 570228,China;Hainan Academy of Marine and Fishery Sciences,Haikou 571126,China;School of Tourism,Hainan University,Haikou 570228,China.)

机构地区：[1]海南大学土木建筑工程学院,海南海口570228 [2]海南省海洋与渔业科学院,海南海口571126 [3]海南大学旅游学院,海南海口570228

出　　处：《海南大学学报（自然科学版）》2022年第1期66-75,共10页Natural Science Journal of Hainan University

基　　金：国家重点研发计划课题(2019YFD0901300,2019YFB1504304);海南省自然科学基金(2019RC105);工信部项目[2019]357号。

摘　　要：本文采用CFD(计算流体动力学)软件模拟了布设间距对组合方型人工鱼礁流场的影响,结果表明:双礁和三礁体在不同布设情况下对礁后的背部涡流场影响较大,当组合礁体纵向布设间距为1倍礁长时,方型鱼礁的涡量发育完全,且涡量的分布结构较为稳定,但当布设间距增至2倍礁长时,涡量大小及分布范围明显减小,且随着布设间距的增大,组合礁体的最大上升流速与来流速度的比值均呈现先增大后减小的趋势,上升流最大抬升高度与鱼礁高度的比值与单礁结构接近,均为2.6左右.本研究揭示了礁体上升流和礁后涡流场的分布规律,可对人工鱼礁周围的营养物质输送和鱼类的聚集规律提供指导.In the report,CFD(Computational Fluid Dynamics)software was used to simulate the effects of reef arrangements on the flow field effect of combination square artificial reefs.The results showed that the twinblock reefs and triple-block reefs have great effects on the back vortex field behind the reef under different layouts.When the longitudinal layout spacing of the combined reefs is once reef length,the vorticity of the square reef develops completely,and the vorticity distribution structure is relatively stable.However,with the increase of the distance to twice reef length,the size and distribution range of vorticity decrease obviously,with the increase of the spacing,the ratio of the maximum upwelling velocity to the incoming velocity of the composite reefs firstly increase,and then,decrease.The ratio of the maximum upwelling elevation to the reef height is similar to that of the single reef structure,both of which are about 2.6.Our findings reveals the distribution of upwelling and vortex field behind the reef,which is helpful for nutrient transport and the rule of fish aggregation around artificial reefs.

关 键 词：水动力分析 人工鱼礁 集鱼效果 数值模拟 

分 类 号：O353.[理学—流体力学]