三圆管型人工鱼礁布设间距的数值模拟及物理稳定性研究  

Numerical Simulation of Disposal Space and Analysis on Physical Stability of Three-Tube Artificial Reefs

作　　者：关长涛[1,2] 李梦杰[1,2] 郑延璇[3] 李娇[2] 崔勇[2] 李真真[1,2] 王腾腾[1,2] 

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]中国水产科学研究院黄海水产研究所农业部海洋渔业可持续发展重点实验室青岛市海水鱼类种子工程与生物技术重点实验室,山东青岛266071 [3]乳山市海洋与渔业局,山东威海264500

出　　处：《中国海洋大学学报（自然科学版）》2016年第9期9-17,共9页Periodical of Ocean University of China

基　　金：公益性行业(农业)科研专项(201003068)资助~~

摘　　要：本文采用RNG K-ε湍流模型和SIMPLEC数值模拟方法,分析了不同雷诺数条件下,布设间距和摆放方式对三圆管型人工鱼礁流场效应的影响。研究显示：采用FLUENT软件模拟,雷诺数能较好地反应人工鱼礁上升流和背涡流的分布情况,上升流的规模和强度随雷诺数的增大而增加,背涡流随雷诺数变化的趋势不明显。三圆管型人工鱼礁横向组合方式下,2个单位礁布设间距等于礁体尺寸时,获得的上升流和背涡流的规模和强度最大;纵向组合方式下,2个单位礁布设间距为礁体尺寸的1.5~2.0倍时,获得的上升流和背涡流的规模和强度最大。在不同实验流速和波况下三圆管型人工鱼礁的抗滑移系数、抗翻滚系数均大于1。研究结果表明,数值模拟能够较好地反应布设间距对礁体周围流场效应的影响,可为人工鱼礁的实际投放提供理论参考。The study of flow field effect and physical stability on artificial reef is very important for the constuction of artificial reefs.As a theoretical discussion,the intensity and scale of combined three-tube artificial reef with different layouts at five Reynolds numbers（Re）were numerically investigated using the RNG k-εturbulent model and SIMPLEC algorithm in this study.The three dimensional flow field around three-tube artificial reefs was analyzed by using the continuity and Reynolds averaged（RANS）equations,generating tetrahedral unstructured mesh elements in GAMBIT.The bottom surface and the side surface used boundary conditions with no-slipping wall,the viscous model used k-εturbulence model,and the pressure-velocity coupling used SIMPLEC algorithm.Utilizing FLUENT6.3.26 to simulate the flow field around five different artificial reef models including single reef and two reefs combined in different disposal spaces.Particle image velocimetry（PIV）technique was also used to analyze the flow flied distribution by comparing the indexes of flow field obtained in experiment and numerical simulation.Results showed that,in the environment of FLUENT software,upwelling size and strength increased with the increase of Reynolds number,but the trend of back eddy was not obvious.In a parallel combination,a better flow field effect of artificial reef was obtained when the disposal space between two parallel reefs was 1times wide of reef size.While in a vertical combination,a better performance occurred when the disposal space between two vertical reefs was 1.5~2.0times of the reef size.At different current velocities and under different wave conditions,both the slip-resistance coefficient and rolling-resistance coefficient of the three-tube artificial reef were greater than 1,which proved that the three-tube artificial reef had good physical stability.The research can provide theoretical reference for the construction of artificial reefs.

关 键 词：人工鱼礁 流场效应 布设间距 数值模拟 物理稳定性 

分 类 号：S931.1[农业科学—渔业资源]