自减流低形变网箱模型试验  

Model experiment of low deformation and auto decrement current cage

作　　者：刘永利[1] 陈晓蕾[1] 石建高[1] 黄洪亮[1] 史航[1] 王鲁民[1] 

机构地区：[1]中国水产科学研究院东海水产研究所,上海200090

出　　处：《海洋渔业》2011年第2期221-225,共5页Marine Fisheries

基　　金：国家高新技术研究发展(863计划)专项(2006AA100301);中央级公益性科研院所基本科研业务费专项资金(中国水产科学研究院东海水产研究所)资助项目(2009T07);浙江省科技计划项目(2008C12066);上海市科学技术委员会资助课题(103919N0900)资助

摘　　要：通过在圆柱形网箱箱体深度的1/2处设置一个中环,将原来的圆形重力式网箱改造成新型自减流低形变网箱（改造后的新型实物网箱周长50 m、中环周长75 m、深8 m）。通过在东海水产研究所内主尺度为90m×6 m×3 m的试验水池对新型自减流低形变模型网箱进行模型试验,研究其箱体内容积和流速的变化。模型试验结果表明,新型网箱的容积保持率明显优于原型网箱,在流速1kn时容积保持率仍能达到90.4%。不同流速下,新型网箱的减流效果比原型网箱提高5.8%-13.9%,内部流速比箱体外界流速减小25.0%-31.2%。该新型网箱可有效降低箱体内的海水流速、提高箱体的容积保持率,为养殖鱼类提供更为良好的生存、生长环境。A middle ring was set up in the middle of the cage,and formed the modified auto decrement current velocity cage（circumference 50 m,depth 8 m and middle ring circumference 75 m）.As a cage model,experiments were made on the modified auto decrement current velocity cage in a flume tank of 90 m×6 m×3 m.Results showed that the volumetric maintenance rate of auto decrement current velocity cage was higher than that of the original cage;the new volumetric maintenance rate was up to 90.4% at 1 kn current velocity;the reducing current velocity effect of new cage increased by 5.8%-13.9% compared with that of the original;the inner current velocity of reducing current velocity cage decreased by 25.0%-31.2% compared with the external current velocity.The auto decrement current velocity cage effectively reduced velocity of inner cage and increased volumetric maintenance rate,which could supply better environment for cultured fishes.

关 键 词：模型试验 水动力性能 深水网箱 减流效果 容积保持率 

分 类 号：S969[农业科学—水产养殖]