水面付近におけるトビウオの滑空特性の解明

抄録

In this research, to develop an aerial/aquatic robot, we focused on gliding characteristics of a flying fish near water surface and performed computational fluid dynamics (CFD) analysis using two types of models: Two-wing model (Case A) has pectoral fins and four-wing model (Case B) has pectoral ones and additionally pelvic ones with cathedral angle functioning as horizontal tails. The simulation result based on the altitude from the water surface showed that the average lift near the water surface increased by 12% because the downwash angle changed. Four-wing model increased it by 26% and attenuated the average pitch (nose-up) moment by 44%. Consequently, the pelvic fins improved glide performance from the viewpoint of lift.