点击次数：

论文类型：期刊论文

发表时间：2013-11-01

发表刊物：AQUACULTURAL ENGINEERING

收录刊物：SCIE、EI、Scopus

卷号：57

页面范围：71-81

ISSN号：0144-8609

关键字：Fishing net; Flow-velocity reduction; Particle-image velocimetry; Laboratory experiment

摘要：A series of laboratory experiments was conducted to investigate the reduction in flow velocity downstream from a fishing net in a current. The flow-velocity distribution downstream from the plane net(s) was obtained using both the particle image velocimetry (PIV) technique and the acoustic Doppler velocimeter (ADV). The reduction in flow velocity was investigated with different net solidities, plane-net inclination angles, spacing distances between two plane nets and plane net numbers. The experimental data show that there was an obvious reduction in flow velocity downstream from the plane net and that the reduction increased with increasing net solidity. The reduction in flow velocity tended to increase with increasing inclination angle between the plane net and the vertical direction. For two plane nets with different spacing distances, the average reduction factor was 0.90 between the two nets and 0.83 downstream from the two nets. As the net number increased from 1 to 4, the minimum reduction factor downstream from the plane nets decreased from 0.90 to 0.68. The study will contribute to understanding of the flow characteristics around a net cage. (C) 2013 Elsevier B.V. All rights reserved.