CA2195413A1 - Lift enhancing tip vortex generation technology - Google Patents

Lift enhancing tip vortex generation technology

Info

Publication number
CA2195413A1
CA2195413A1 CA002195413A CA2195413A CA2195413A1 CA 2195413 A1 CA2195413 A1 CA 2195413A1 CA 002195413 A CA002195413 A CA 002195413A CA 2195413 A CA2195413 A CA 2195413A CA 2195413 A1 CA2195413 A1 CA 2195413A1
Authority
CA
Canada
Prior art keywords
foil
vortex
methods
tip
beneficial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002195413A
Other languages
French (fr)
Other versions
CA2195413C (en
Inventor
Peter Thomas Mccarthy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/276,407 external-priority patent/US5634613A/en
Application filed by Individual filed Critical Individual
Publication of CA2195413A1 publication Critical patent/CA2195413A1/en
Application granted granted Critical
Publication of CA2195413C publication Critical patent/CA2195413C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/10—Drag reduction

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Wind Motors (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

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.
CA002195413A 1994-07-18 1995-07-18 Lift enhancing tip vortex generation technology Expired - Lifetime CA2195413C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/276,407 1994-07-18
US08/276,407 US5634613A (en) 1994-07-18 1994-07-18 Tip vortex generation technology for creating a lift enhancing and drag reducing upwash effect
PCT/US1995/009051 WO1996003215A2 (en) 1994-07-18 1995-07-18 Lift enhancing tip vortex generation technology

Publications (2)

Publication Number Publication Date
CA2195413A1 true CA2195413A1 (en) 1996-02-08
CA2195413C CA2195413C (en) 2005-10-25

Family

ID=35311693

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002195413A Expired - Lifetime CA2195413C (en) 1994-07-18 1995-07-18 Lift enhancing tip vortex generation technology

Country Status (1)

Country Link
CA (1) CA2195413C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115885915A (en) * 2022-11-24 2023-04-04 武汉理工大学 Multi-point oxygen supply device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115885915A (en) * 2022-11-24 2023-04-04 武汉理工大学 Multi-point oxygen supply device
CN115885915B (en) * 2022-11-24 2023-06-27 武汉理工大学 Multi-point oxygen supply device

Also Published As

Publication number Publication date
CA2195413C (en) 2005-10-25

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Effective date: 20150720