福建省拖网模型水池试验研究

Aresearch Report on Experiment of Trawl Model in Towing Tank for the trawls of Fujian Province

模型试验是研究渔具作业性能最直观方便的方法。本文通过对全省南北有代表性的七张对拖网具进行的网模系列试验,对比和分析了各地使用的不同结构拖网渔具的作业参数和特性,得出底拖网阻力经验公式及体现渔具性能优劣的四个要素(阻力、网高、垂直扩张系数和能耗系数)。

Model testing is a convenient and audio-visual means in studying fishing gear performance, In this experiment, 7 pair trawls which are located along the coast area from the north to the south of Fujian province have been selected and a series of model tests have been done in towing tank. Comparing and analyzing the factors and characters of different structure of trawls used in different areas of Fujian Province, We in the paper, deduced the formulas for calculating the main towing resistance of the trawls and described the four key factors (the resistance, the net mouth height, the rate of vertical opening and the energy-consuming) which are very important in operating the trawls.