Flow Field Pattern and Hydrodynamic Characteristics of a Grid Device Made with Various Grid Bar Spacings at Different Inclination Angles-Reference-Cited by-同舟云学术

Flow Field Pattern and Hydrodynamic Characteristics of a Grid Device Made with Various Grid Bar Spacings at Different Inclination Angles

Published:2023-10-11 Issue:10 Volume:11 Page:1966
ISSN:2077-1312
Container-title:Journal of Marine Science and Engineering
language:en
Short-container-title:JMSE

Author:

Zhang Can¹,Tang Hao¹²³⁴⁵^ORCID,Thierry Nyatchouba Nsangue Bruno¹^ORCID,Yin Liqiang⁶,Zhang Feng¹,Zhu Meixi¹,Shan Chenxu¹,Xu Liuxiong¹²³⁴⁵,Hu Fuxiang⁷

Affiliation:

1. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China

2. National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China

3. Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China

4. The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai Ocean University, Ministry of Education, Shanghai 201306, China

5. Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China

6. South China Sea Marine Survey Center, Ministry of Natural Resources, Guangzhou 510310, China

7. Faculty of Marine Science, Tokyo University of Marine Science and Technology, Minato, Tokyo 108-8477, Japan

Abstract

The grid is a crucial component in constructing grid-type bycatch reduction devices. The grid’s structural characteristics and orientation significantly impact the hydrodynamic characteristics and efficacy of the separation device. Therefore, it is essential to thoroughly understand the grid device’s hydrodynamic characteristics and flow field to optimize its structure. Thus, this study used CFD numerical simulation and flume tank experiments to investigate the effects of inclination grid angles and grid bar spacing on hydrodynamic forces and flow fields around a circular grid. The results indicated that the hydrodynamic forces acting on the circular grid increased with higher flow velocity and inclination grid angle, decreasing with smaller grid bar spacing. Flow velocity acceleration zones were observed at the upper and lower ends of the grid and between the grid bars. Additionally, upwelling and vortices were present at the back of the grid. It was found that an increase in the inclination grid angle accelerated the vortex and wake effects.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Shanghai

Publisher

MDPI AG

Subject

Ocean Engineering,Water Science and Technology,Civil and Structural Engineering

Link

https://www.mdpi.com/2077-1312/11/10/1966/pdf

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