Rib structure and object
By adjusting the angle between the ridgeline and the flow direction and the distance between the foot of the ridge in the corrugated rib structure to form an acute apex, the problems of pressure drag and manufacturing difficulty in the corrugated rib structure are solved, achieving higher drag reduction performance and simplified manufacturing.
CN116507811BActive Publication Date: 2026-07-03JAPAN AEROSPACE EXPLORATION AGENCY
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JAPAN AEROSPACE EXPLORATION AGENCY
- Filing Date
- 2021-09-22
- Publication Date
- 2026-07-03
AI Technical Summary
Technical Problem
Existing corrugated rib structures generate excessive pressure drag when the ridgeline forms a large angle with the flow direction, and are difficult to manufacture, resulting in poor drag reduction performance.
Method used
The rib structure is designed so that the greater the angle between the ridgeline and the flow direction, the lower the height and the narrower the width between the foothills. The cross-sectional shape remains consistent in any position, and the acute-angled tip is formed by roller transfer printing, simplifying the manufacturing process.
Benefits of technology
It effectively suppresses differential pressure resistance, reduces surface friction resistance, improves drag reduction performance, and is easy to manufacture.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN116507811B_ABST
Abstract
This invention provides a rib structure that improves drag reduction performance and is easy to manufacture, as well as an object having such a structure on its surface. The rib structure has multiple wavy ribs on its surface, wherein, in each rib, the larger the angle between the ridgeline and the direction of fluid flow, the lower the height of the mountain; the larger the angle, the smaller the width between the mountain bases in the direction orthogonal to the direction of fluid flow; and the angle between the slope of the rib at the mountain base and the surface, or the curvature at the mountain base, is the same at any position in the cross-sectional shape in the direction orthogonal to the direction of fluid flow.
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