基于结构差异性正方体鱼礁的流场效应研究

Flow Field Effect of Cube Reef Monocase of Different Structure

中文关键词: 流场效应  单位鱼礁  体积模型  数值实验  正方体鱼礁

英文关键词: Flow field effect  Unit reef  Volume effect model  Numerical experiment  Cube reef monocase

中文摘要:

      人工鱼礁结构差异是影响流场规模效应的主要因素之一，本研究选择大字型、米字型、回字型、交叉型、框架型和实体型6种鱼礁单体，分析均匀布设模式下礁体自身结构特征对流场效应的影响规律，进一步建立结构差异性单位鱼礁的规模效应模型。基于流场效应规律提出礁体结构特征指标分别为鱼礁空方体积比、透空率和迎流面相对截面积，进一步得到上升流体积效应模型为Vu=0.448Ru–1.679–Cp(29.868Cp–6.921)+Rsa(56.18Rsa–35.42)，背涡流体积效应模型为Vb=Ru(1830Ru–128)– Rv(95Rv–105)+Cp(138Cp–154)–Rsa(418Rsa–180)。最后，基于流场体积效应模型，提出以流场体积为依据的礁体结构参数选择建议，可为以流场体积为建设目标的最优鱼礁结构设计提供参数指导。

英文摘要:

      The differences in artificial reef structure is one of the main factors affecting the scale effect of the flow field. We selected six widely-used types of reef monocases, namely Da-zi, Mi-zi, Hui-zi, Frame, Cross, and Solid artificial reefs, to study the influence of reef body structure characteristics on the flow field effect in a uniform layout model and further establishe the scale effect model of structurally different unit reefs. The results showed that, based on the law of flow field effect, the indices of reef structure characteristics were volume ratio, permeability coefficient, and relative cross-sectional area of reef monocase. The volume effect model of upwelling was Vu=0.448Ru–1.679–Cp(29.868Cp–6.921)+ Rsa(56.18Rsa–35.42), and the back eddy volume model was Vb=Ru(1830Ru–128)–Rv(95Rv–105)+ Cp(138Cp–154)–Rsa(418Rsa–180). Finally, based on the volume effect model of the flow field, we propose suggestions for selecting structural parameters of the reef body, which provides reasonable parameter guidance for the structural design of an optimal reef based on the flow field volume.