公开(公告)号：US20230365251A1

公开(公告)日：2023-11-16

申请号：US18245562

申请日：2021-09-22

申请人： JAPAN AEROSPACE EXPLORATION AGENCY

发明人： Mitsuru KURITA ,  Hiroyuki ABE ,  Hidetoshi IIJIMA ,  Seigo KOGA

IPC分类号： B64C21/10 ,  F15D1/12 ,  F15D1/00

CPC分类号： B64C21/10 ,  F15D1/004 ,  F15D1/12 ,  B64C2230/26

摘要： [Object] To provide a riblet structure that increases resistance reducing performance and is easily manufacturable, and an object including such a structure on a surface thereof. [Solving Means] This riblet structure includes a plurality of wave-shaped riblets on a surface thereof, in which each of the riblets has a smaller peak height as an angle formed between a ridge line and a fluid flow direction becomes larger, a width between peak bases in a direction orthogonal to the fluid flow direction becomes smaller as the angle becomes larger, and an angle formed between a slope of a peak of the riblet and the surface at the peak base or a curvature at the peak base is identical at any position in a cross-sectional shape in the direction orthogonal to the fluid direction.