Apparatus for reducing turbulent surface friction using carbon dioxide, riblets, and suction holes
The device utilizing carbon dioxide and riblets with suction holes effectively addresses the challenge of high turbulent friction by controlling the viscous sublayer, improving aircraft efficiency and reducing fuel consumption.
JP2026522198APending Publication Date: 2026-07-07
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Patent Information
- Application Number
- JP2025568107
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Priority Date
- 2023-08-07
- Filing Date
- 2024-03-07
- Publication Date
- 2026-07-07
AI Technical Summary
Technical Problem
Existing methods to reduce turbulent wall friction are costly, erode surfaces, and require complex manufacturing, while turbulent flow dominates due to high friction coefficients, with limited reduction from increasing Reynolds numbers.
Method used
A device using carbon dioxide and riblets of specific dimensions, combined with suction holes, to control the viscous sublayer and limit turbulent boundary layer growth, reducing friction through active flow control.
Benefits of technology
Significantly reduces skin friction drag, enhancing aircraft performance and efficiency, and decreasing fuel consumption and emissions by leveraging the unique interaction of carbon dioxide with riblets.
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Smart Images
Figure 2026522198000001_ABST
Abstract
An apparatus for reducing turbulent surface frictional resistance using carbon dioxide, riblets, and suction holes, the apparatus comprising: a surface, a plenum, riblets, suction holes, and a thin film, characterized in that carbon dioxide is discharged into the grooves of the riblets while the incoming flow is deflected at the top by a flow deflector, the carbon dioxide interacts with riblets having specific dimensions and coated with anions that attract carbon dioxide molecules; the flow is then partially drawn into the plenum through the suction holes to prevent turbulent separation.
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