| 大网目底中层拖网模型试验研究 |
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| 引用本文： | 戴天元,郭献盛,杨丁言.大网目底中层拖网模型试验研究[J].福建水产,2001(3). |
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| 作者姓名： | 戴天元 郭献盛 杨丁言 |
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| 作者单位： | 福建省水产研究所，厦门市水产技术推广站，厦门市水产技术推广站 福建 厦门 361012，福建 厦门 361005，福建 厦门 361005 |
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| 基金项目： | 厦门市财政局1997年的资助项目 |
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| 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。
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| 关 键 词： | 大网目 底中层拖网 模型试验 |
Study of the Bottom and Middle Water Trawl Models With Large Mesh Testing in Towing Tank |
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| DAI Tian-yuan.Study of the Bottom and Middle Water Trawl Models With Large Mesh Testing in Towing Tank[J].Journal of Fujian Fisheries,2001(3). |
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| Authors: | DAI Tian-yuan |
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| Abstract: | 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. |
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| Keywords: | Bottom and middle water trawls Large meshes Model test |
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