Experiment and Research of Krill Trawl Net
Experiment and Research of Krill Trawl Net
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发表时间：
2011
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通讯作者：
Feng Chun-lei
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作者：
Feng Chun-lei
本文介绍了在南极海域首次捕捞磷虾时使用的两张大型磷虾中拖网作为实网进行的网模试验。试验旨在测试网的阻力和网口高度，分析网口的水动力性能。结果表明：网口部分采用六边形网格的2号网的垂直扩展和等体积滤波功耗均优于网口部分采用棱柱形网格的1号网；拖网速度为1.54m/s时，1号网的动力消耗系数比2号网高26%，垂直展布系数比2号网低1.1%。磷虾拖网阻力计算公式为R=0.25(d/a)LCV1.49。
This paper describes the experiment of net models by the two large size krill middle trawling nets used in the first exploitation of krill fishing in the Antarctic waters as actual net. The experiment is aimed to test the resistance of net and height of net mouth and analyze the performance of hydrodynamic force. The results is indicated that the vertical spread of No.2 net with hexagon mesh at net mouth part and power consumption at filtering equal volume excel the No.1 net with prismatic mesh at net mouth part;that at trawling speed of 1.54m/s the power consumption coefficient is 26% more than that of No.2 net and the vertical spread coefficient of No.1 net is 1.1% lower than that of No.2. The resistance of krill trawling net can be calculated by the formula of R=0.25(d/a)LCV1.49 .