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复合M型人工鱼礁粒子图像测速二维流场试验研究

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Indexed by: Journal Article

Date of Publication: 2010-02-20

Journal: 渔业现代化

Included Journals: ISTIC、PKU

Volume: 37

Issue: 1

Page Number: 15-19

ISSN: 1007-9580

Key Words: 人工鱼礁;粒子图像测速(PIV);上升流;背涡流;定量分析

Abstract: 为了获得复合M型人工鱼礁的流场效应,为鱼礁的结构设计提供理论依据,选取3个不同水流流速(6.7 cm/s、11.0 cm/s、18.0 cm/s),采用粒子图像测速(PIV)技术,对复合M型人工鱼礁的二维流场进行测试.结果表明:礁体迎流面和背流面分别产生上升流和背涡流,其规模随着来流速度的增加而增大;当鱼礁圆柱孔与流向夹角为90°时所产生的上升流高度为礁高的53%~90%,背涡流面积为迎流面积的0.7~1.3倍;夹角为0°时上升流高度为礁高的33%~83%,背涡流面积为迎流面积的40%~60%;90°工况下上升流平均流速是0°工况时的1.1~2.7倍,背涡流的最大回流速度为0°时的3.0~9.0倍.鱼礁投放时采用鱼礁圆柱孔与水流流向垂直的摆放形式流态较好.

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