水中における各種嚢網の抵抗について-V

概要

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The hydrodynamic resistance of various types of cod ends of towing net (Figs. 1-3, Table 1) was measured experimentally. The results were compared with theoretical values which had been given by some formulae for the resistance (Eqs. 10, 13, 14, 15, V-l, -2 and -3) of the previous2) and the present reports of this series. So far as the present series of model experiment have concerned (towing speed is in the range from 0.1 to 2.5m/sec), the resistance of each net increased in proportion to 1.8-1.9 power of towing speed and was about the same each other both from the results of the theory and the experiment, regardless of net type (Table 2, Fig. 5). And the drag-coefficients of netting twine of these nets were almost coincide with that of infinite circular cylinder (Fig. 4). Beside, the shape of each net during model experiment almost conformed to that expected by the theory as in the previous report2).
公益社団法人日本水産学会の論文