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单体及双体人工鱼礁流场效应的研究,是鱼礁结构设计和投放布局的重要理论基础。将PIV(粒子图像测速)二维流场测试技术应用到人工鱼礁领域,对单体和双体星型人工鱼礁在三种流速下所产生的流场效应进行了测试。通过试验获得了鱼礁周围的流场规模和主要特征流(上升流和背涡流)的性质。结果表明,单体鱼礁所产生的上升流和背涡流的规模和强度与其摆放高度和迎流面积有关;组合鱼礁周围流场分布与两鱼礁的排列方式(横向与纵向)和间距有关,两鱼礁横向排列比单体鱼礁产生的流场效应强,纵向排列两鱼礁之间出现漩涡结构。
The study on the flow field effects of single and double artificial reefs is an important theoretical basis for the structural design and deployment of reefs. The PIV (Particle Image Velocimetry) two-dimensional flow field test technique was applied to the field of artificial reefs to test the flow field effect produced by three types of artificial reefs. The size of the flow field around the reef and the nature of the main characteristic flows (ascending and back vortices) were obtained through experiments. The results show that the size and intensity of upwelling and back vortices generated by single reefs are related to the height of the reefs and the catch-up area. The distribution of the flow field around the reefs and the arrangement of the two reefs (horizontal and vertical) and the spacing The two fish reef horizontal arrangement than the single fish reef flow field effect is strong, longitudinally arranged between the two reef whirlpool structure.