Title:
【発明の名称】揚力を増大し且つ抗力を減少させるための吹き上げ効果を発生させる翼端渦の発生技術
Document Type and Number:
Japanese Patent JPH10503140
Kind Code:
A
Abstract:
Methods for using tip generated vortices to improve performance of foils. These methods include generating substantially streamwise beneficial vortex (74) near the outboard end (60) of a foil (82). This beneficial vortex (74) spins in the opposite direction of an induced drag vortex (62), and is used to create an upwash field (76) which neutralizes induced drag by deflecting the flow behind the trailing edge (56) at an upward angle. Upwash field (76) causes the lift vector (118) on the foil (82) to tilt forward, thereby creating a forward directed force of induced thrust upon the foil (82). Beneficial vortex (74) is also used to contain and compress the high pressure field existing along the attacking surface of the foil (82). Embodiments include a twist (66) along the span of a foil (82b), an anhedral tip droop having a divergent axis of droop curvature (86), a movable vortex flap (102), a cone shaped vortex flap network (162). Methods for reducing overall tip vorticity are disclosed.
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Inventors:
McCarthy, Peter, Thomas
Application Number:
JP50582996A
Publication Date:
March 24, 1998
Filing Date:
July 18, 1995
Export Citation:
Assignee:
McCarthy, Peter, Thomas
International Classes:
B64C3/10; B64C23/06; (IPC1-7): B64C3/10
Attorney, Agent or Firm:
Akira Asamura (3 outside)