A COMPARISON OF ONE-10TH AND FULL-SCALE MEASUREMENTS OF THE DRAG AND GEOMETRY OF A PELAGIC TRAWL

被引：8

作者：

WARD, JN ^{[1
]}

FERRO, RST ^{[1
]}

机构：

[1] SEA FISH IND AUTHOR SEAFISH,KINGSTON HULL,ENGLAND

来源：

FISHERIES RESEARCH | 1993年 / 17卷 / 3-4期

关键词：

D O I：

10.1016/0165-7836(93)90132-Q

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

Current practices in modelling fishing gear have been investigated by comparing the shape and drag of a nylon pelagic trawl at one-tenth scale with those of its full-scale equivalent. Careful attention was paid to the design and manufacture of the model to ensure that the currently accepted practices based on maintaining constant Froude number were observed. The results show that the drag coefficient for the net may be significantly higher at model scale because constant Reynolds number is not maintained between model and full scale. Furthermore, considerable changes in the shape and drag of the model were observed when small changes were made to the hanging ratio of the netting on the selvedge ropes. It is concluded that accurate modelling must take into account rope and twine elongation, particularly in nylon nets, and the change of drag coefficient with Reynolds number when Froude number is held constant.

引用

页码：311 / 331

页数：21

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