摘要
利用1:22.82比例的2张网具模型,在拖曳水槽中进行底中层拖网的网具性能测试,得出网具阻力公式为:F=0.121(d/a)LCV^(1.62),网口高度的公式为:H=0.225CV^(-1.316),2张网具的作业性能良好,GM_2的垂直张开性能优良,拖速3节时的垂直扩张系数已接近7％,能耗系数在拖速3节时为0.2kw.h/10~4m^3,在同类渔具中较优;GM_1网的能耗系数比GM_2网低,在拖速3节时低于9％左右,作为中层拖网时的总体性能优良。
The performances of two bottom and middle water trawl models with 1:22.82 scale were tested in towing tank. Following results were obtained: (1) The formula of drag resistance is F = 0.121(a/d)LCV1.62and the formula of headline height is H = 0.225CV-1.316,which shows that the performances of two trawls are good.(2) For trawl GM2, the vertical opening rate approaches 7% and energy consumption rate is 0.2kw.h/104m3 at 3 knots, which shows that the performance of vertical opening is better than those of the same kind of other trawls. (3) The energy consumption rate of GM1 is lower about 9% than that of GM2. The performance of trawl GM2 is good when it is used to be middle water trawl.
出处
《福建水产》
2001年第3期19-25,共7页
Journal of Fujian Fisheries
基金
厦门市财政局1997年的资助项目
关键词
大网目
底中层拖网
模型试验
Bottom and middle water trawls
Large meshes, Model test
