文章摘要
林 军,章守宇,叶灵娜.基于流场数值仿真的人工鱼礁组合优化研究[J].水产学报,2013,37(7):1023~1031
基于流场数值仿真的人工鱼礁组合优化研究
Optimization study of artificial reef assemblage based on the numerical simulation of flow field
投稿时间:2012-10-05  修订日期:2013-01-15
DOI:10.3724/SP.J.1231.2013.38362
中文关键词: 人工鱼礁组合  流场效应  数值模拟  优化  大涡模拟(LES)
英文关键词: artificial reef assemblage  effects of flow  numerical simulation  optimization  large eddy simulation(LES)
基金项目:公益性行业(农业)科研专项(201003068,201303047);上海海洋大学博士启动基金项目(B-5301-11-0222)
作者单位
林 军 上海海洋大学海洋科学学院 
章守宇 上海海洋大学海洋科学学院 
叶灵娜 上海海洋大学海洋科学学院 
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中文摘要:
      基于特征礁水槽集鱼实验,研究了不同结构人工鱼礁和不同背景速度下黑鲷幼鱼在各流速区段出现频度,以鱼类出现频度高、水平流速为背景速度的0.7倍和0.8倍以下的流场空间体积作为背涡流范围指标,以垂向上升流速为水平来流速度的0.1倍和0.2倍以上的空间体积作为上升流范围指标,基于Fluent、采用大涡模拟法(LES)的湍流模型,进行数值水槽建模,以4种单位鱼礁组合方案为例来分析不同组合流场效应的差异和优劣。研究表明,边长3 m的正方体鱼礁,以20~30个单礁、1~2倍礁距进行五点式、对称型单位鱼礁组合投放为宜,这样既能发挥礁体的协同效应,又能使单位鱼礁的调控范围达到最大化。
英文摘要:
      Based on the aggregation experiments of feature-reef trough,the occurrence frequency of Sparus Macrocephalus larvae around artificial fish reefs was studied with different structures and at different background velocities.The highest frequency of fish occurrence,space volume of flow velocity of <0.7 times and<0.8 times to background were considered as indexes of wake vortex range.The space volume with vertical upwelling velocity >0.1 time and >0.2 time of the upwind horizontal velocity was considered as the index of upwelling range.Based on Fluent with a turbulence model named LES(Large Eddy Simulation),a numerical trough was built and four unit-reef assemblages as an example were adopted to analyze the difference and merits of various assemblages’ flow effect.The result showed it was appropriate to place 20-30 unit reefs(cube,3 meters of side length)as a 5-point symmetric mode,and 1-2 times reef distance in reef area,as this could not only bring about synergistic effect of reefs,but also optimize the regulation range of unit-reef.
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