Flow Visualization around a Waving Wing 2nd Report

Flow Field in Non-Sinusoidal Motion

Abstract

Waving wing is a basic model for the analysis of fish-like propulsion in two-dimensional case which achieved high efficiency in comparison with the ordinary artificial propulsion system. The authors have developed a waving wing model, and consider the flow field around it in the previous report. The model motion is controlled through six parallel lines, and it achieves not only the sinusoidal but also any periodical motions. In the present paper, the flow field is visualized and measured in the case of non-sinusoidal motion that simulates the impulsive starting of fishes and the swimming motion of human legs.