EVALUATION METHOD AND DESIGN METHOD OF FIN FOR UNDERWATER PROPULSION

摘要

PROBLEM TO BE SOLVED: To provide the evaluation method and design method of a fin for underwater propulsion capable of quantitatively judging the degree of performances in advance, efficiently designing the fin, and shortening a design period.;SOLUTION: By putting the fin in a tank and towing it or circulating water, the lift F_L1 and drag F_D1 of the fin are measured, and a lift coefficient C_L and a drag coefficient C_D are obtained by calculation from the lift F_L1 and the drag F_D1. By using the obtained lift coefficient C_L and drag coefficient C_D, the lift F_L2 and drag F_D2 of the fin at the time of making the fin perform oscillating wing motion are calculated, the composite force of the lift F_L2 and the drag F_D2 is calculated, the fin advancing direction component of the composite force is turned to propulsive force, and the fin is designed.;COPYRIGHT: (C)2006,JPO&NCIPI