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US 12,415,596 B2Granted
Riblet structure and object
AssigneeJapan Aerospace Exploration Agency
InventorsMitsuru Kurita, Hiroyuki Abe, Monami Sasamori, Seigo Koga
Life of this patent
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Abstract
A riblet structure according to the present technology includes a plurality of riblets that are arranged in a width direction and each include a first wall portion and a second wall portion, the first wall portion being vertically provided to be substantially perpendicular to a bottom portion, the second wall portion including an inclined portion connected to the first wall portion at an apex portion and inclined with respect to a perpendicular direction at a predetermined angle.
Claims13
A riblet structure, comprising
- a plurality of riblets that are arranged at intervals in a width direction and each include a first wall portion and a second wall portion, the first wall portion being vertically provided to be substantially perpendicular to a flat bottom portion, the second wall portion being connected to the first wall portion at an apex portion,
- wherein the first wall portion is vertically provided to be substantially perpendicular from the apex portion to the flat bottom portion to form a groove portion having a right-angled cross section together with an upper surface of the flat bottom portion, and
- wherein the second wall portion includes an inclined portion that is connected to the first wall portion at the apex portion and inclined with respect to a perpendicular direction at a predetermined angle.
An object, comprising
- a riblet structure on a surface of the object, the riblet structure including
- a plurality of riblets that are arranged at intervals in a width direction and each include a first wall portion and a second wall portion, the first wall portion being vertically provided to be substantially perpendicular to a flat bottom portion, the second wall portion being connected to the first wall portion at an apex portion,
- wherein the first wall portion is vertically provided to be substantially perpendicular from the apex portion to the flat bottom portion to form a groove portion having a right-angled cross section together with an upper surface of the flat bottom portion, and
- wherein the second wall portion includes an inclined portion that is connected to the first wall portion at the apex portion and inclined with respect to a perpendicular direction at a predetermined angle.
1 more element
Dependencies are inferred from the claim text.