Title:
RAISED STRUCTURE AND WING
Document Type and Number:
WIPO Patent Application WO/2020/203284
Kind Code:
A1
Abstract:
This raised structure reduces friction resistance due to the viscosity of main flow that flows toward an object in a direction in which an acute angle is formed with respect to an end section of the object. The raised structure includes a plurality of raised bodies that are provided to the surface of an object in the downstream side of stagnation points of the main flow in the end section and extend in the flow direction of the main flow on the surface. The height of each of the plurality of raised bodies varies along a convex smooth curve in which the height gradually increase from both end sections toward a middle section and is maximized in the middle section even in any cross-section in the longitudinal direction and the transverse direction. The plurality of raised bodies form first recesses and protrusions periodically varying in a first cross-section that has a constant distance from the stagnation points and is perpendicular to the surface. The plurality of raised bodies have recesses and protrusions periodically varying in a line connecting the stagnation points and the second cross-section that is perpendicular to the first cross-section, and are arranged so as to form second recesses and protrusions, the heights of the apexes of the protrusions varying along the concave envelope curve.
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Inventors:
HIROTA MAKOTO (JP)
HATTORI YUJI (JP)
IDE YUKI (JP)
TAKAMI HIKARU (JP)
YOSHIMOTO MINORU (JP)
HATTORI YUJI (JP)
IDE YUKI (JP)
TAKAMI HIKARU (JP)
YOSHIMOTO MINORU (JP)
Application Number:
PCT/JP2020/011911
Publication Date:
October 08, 2020
Filing Date:
March 18, 2020
Export Citation:
Assignee:
UNIV TOHOKU (JP)
JAPAN AEROSPACE EXPLORATION (JP)
MITSUBISHI HEAVY IND LTD (JP)
JAPAN AEROSPACE EXPLORATION (JP)
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
F15D1/12
Domestic Patent References:
| WO2009000703A1 | 2008-12-31 | |||
| WO2014026246A1 | 2014-02-20 |
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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