DE4208751A1 - Reducing resistance to aerofoil or hydrofoil passing through medium e.g. air or water - uses array of teeth formed on leading and/or trailing edge of aerofoil or hydrofoil section - Google Patents

Reducing resistance to aerofoil or hydrofoil passing through medium e.g. air or water - uses array of teeth formed on leading and/or trailing edge of aerofoil or hydrofoil section

Info

Publication number
DE4208751A1
DE4208751A1 DE4208751A DE4208751A DE4208751A1 DE 4208751 A1 DE4208751 A1 DE 4208751A1 DE 4208751 A DE4208751 A DE 4208751A DE 4208751 A DE4208751 A DE 4208751A DE 4208751 A1 DE4208751 A1 DE 4208751A1
Authority
DE
Germany
Prior art keywords
aerofoil
hydrofoil
teeth
air
trailing edge
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.)
Ceased
Application number
DE4208751A
Other languages
German (de)
Inventor
Fritz Karl Hausser
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 DE4206066A external-priority patent/DE4206066A1/en
Application filed by Individual filed Critical Individual
Priority to DE4208751A priority Critical patent/DE4208751A1/en
Publication of DE4208751A1 publication Critical patent/DE4208751A1/en
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C3/00—Wings
    • B64C3/10—Shape of wings
    • B64C3/14—Aerofoil profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/26—Blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C21/00—Influencing air flow over aircraft surfaces by affecting boundary layer flow
    • B64C21/02—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C3/00—Wings
    • B64C3/10—Shape of wings
    • B64C3/14—Aerofoil profile
    • B64C2003/146—Aerofoil profile comprising leading edges of particular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/20—Boundary layer controls by passively inducing fluid flow, e.g. by means of a pressure difference between both ends of a slot or duct
    • 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

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The teeth on the leading edge of an aero/hydrofoil section ensures a smooth flow of the air/water over the section. The teeth on the trailing edge prevent the formation of eddies or turbulence. The shape, length, width, spacing and alignment of the teeth, as well as the number of rows of teeth, will depend on the size and speed of the section through the air/water. USE - Teeth on leading and trailing edge are used on rotors for jet motors and ventilator fans, and on boats and aircraft to reduce fluid flow resistance.

Description

Titeltitle

Gezahnte Fronten, Kanten oder Ränder von Körpern die mit dem selben Prinzip arbeiten wie die im Antrag P 42 06 066.4.Toothed fronts, edges or edges of bodies who work on the same principle as that in Proposal P 42 06 066.4.

Stand der TechnikState of the art

Rotoren von Jet-Antriebswerke, Ventilatoren, Boote, Flugzeuge, etc. haben gerade Kanten.Rotors of jet engines, fans, boats, Airplanes, etc. have straight edges.

Problemproblem

Der angegebenen Erfindung liegt das Problem zugrunde, den Wasser- bzw. Luftwiderstand bei obengenannten Körpern zu vermindern.The stated invention is the problem based on the water or air resistance reduce the above bodies.

Erzielbare VorteileAchievable advantages

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß der vordere gezahnte Rand eines Körpers die Luft oder Wasser sanfter schneidet und/oder der hintere gezahnte Rand die Wirbelbildung herabsetzt. Dadurch wird die Leistung deutlich verbessert. Form, Länge, Breite, Abstand und Ausrichtung der Zähne sowie die Anzahl der Zahnreihen hängt von der Größe und Geschwindigkeit des Körpers ab.The advantages achieved with the invention exist especially in that the front toothed edge a body's air or water more gently cuts and / or the rear toothed edge Vertebrae reduced. This will significantly improve performance. Shape, length, width, distance and orientation of the Teeth as well as the number of rows of teeth depends on the size and speed of the body.

AusführungsbeispielEmbodiment

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen von den Anträgen P 42 06 066.4 und P 42 08 751.1 dargestellt.An embodiment of the invention is in the Drawings from applications P 42 06 066.4 and P 42 08 751.1 shown.

Claims (1)

Oberbegriff:
Gezahnte Fronten, Kanten oder Ränder von Körpern.
Kennzeichnender Teil:
Vordere und/oder hintere gezahnte Rand eines Körpers zur Verringerung des Wasser- bzw. Luftwiderstandes.Generic term:
Toothed fronts, edges or edges of bodies.
Characteristic part:
Front and / or rear toothed edge of a body to reduce water or air resistance.
DE4208751A 1992-02-27 1992-03-20 Reducing resistance to aerofoil or hydrofoil passing through medium e.g. air or water - uses array of teeth formed on leading and/or trailing edge of aerofoil or hydrofoil section Ceased DE4208751A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4208751A DE4208751A1 (en) 1992-02-27 1992-03-20 Reducing resistance to aerofoil or hydrofoil passing through medium e.g. air or water - uses array of teeth formed on leading and/or trailing edge of aerofoil or hydrofoil section

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4206066A DE4206066A1 (en) 1992-02-27 1992-02-27 Propeller or rotor blades - are designed to reduce eddies and air or water resistance and have toothed leading and trailing edges
DE4208751A DE4208751A1 (en) 1992-02-27 1992-03-20 Reducing resistance to aerofoil or hydrofoil passing through medium e.g. air or water - uses array of teeth formed on leading and/or trailing edge of aerofoil or hydrofoil section

Publications (1)

Publication Number Publication Date
DE4208751A1 true DE4208751A1 (en) 1993-11-11

Family

ID=25912266

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4208751A Ceased DE4208751A1 (en) 1992-02-27 1992-03-20 Reducing resistance to aerofoil or hydrofoil passing through medium e.g. air or water - uses array of teeth formed on leading and/or trailing edge of aerofoil or hydrofoil section

Country Status (1)

Country Link
DE (1) DE4208751A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19634296A1 (en) * 1996-08-24 1997-04-24 Erich Dipl Ing Ufer Aircraft fan jet propulsion unit
DE19964114A1 (en) * 1999-12-31 2001-07-19 Dlr Ev Aerofoil section with lift-increasing trailing edge, in which trailing edge has spoilers on one or both sides to cause flow breakaway
DE10027938A1 (en) * 2000-05-31 2001-12-13 Dlr Ev Aerofoil section with lift-increasing trailing edge, in which trailing edge has spoilers on one or both sides to cause flow breakaway
US6733240B2 (en) * 2001-07-18 2004-05-11 General Electric Company Serrated fan blade
DE202009010904U1 (en) * 2009-08-17 2010-12-30 Becker Marine Systems Gmbh & Co. Kg Hydrofoils for watercraft
WO2014109670A2 (en) * 2013-11-19 2014-07-17 Trubaev Nikolay Alekseevich Method and apparatus for achieving laminar flow of gas or liquid near cutting edges
EP2567892A3 (en) * 2011-09-06 2015-08-19 Airbus Operations S.L. Aircraft tail surface with a leading edge section of undulated shape
CN106564585A (en) * 2016-10-26 2017-04-19 北京航空航天大学 High-performance deep-stall wing structure and aircraft
CN107226193A (en) * 2017-06-09 2017-10-03 昆明鞘翼科技有限公司 A kind of method for reducing aircraft fuselage flight resistance

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1446011A (en) * 1921-07-05 1923-02-20 Jackson Robert Cattley Propeller
DE420325C (en) * 1925-10-19 Constantin Muskalla Device for damping tip vortices on aircraft wings u. like
FR681633A (en) * 1928-09-12 1930-05-16 Improvements to lifting surfaces for aerial devices
GB329783A (en) * 1929-04-17 1930-05-29 Louis Henry Crook Improvements in or relating to aerodynamic wing control
FR794841A (en) * 1934-11-28 1936-02-26 Improvements made to surfaces working on fluids: propeller blades, planes of airplanes, etc.
US2800291A (en) * 1950-10-24 1957-07-23 Stephens Arthur Veryan Solid boundary surface for contact with a relatively moving fluid medium
DE6940421U (en) * 1969-10-13 1970-04-16 Heinrich Hennigs PROPELLER WITH REDUCED AIR RESISTANCE
US4067518A (en) * 1976-05-20 1978-01-10 Lockheed Corporation Drag reducer for lift surface of aircraft
DE2830371A1 (en) * 1977-07-18 1979-02-08 Roger A Thompson WING FLOW DEVICE
DE2636056C2 (en) * 1976-08-11 1983-07-21 Rhein-Flugzeugbau GmbH, 4050 Mönchengladbach Blade for a rotor, in particular a propeller
FR2639902A1 (en) * 1988-12-06 1990-06-08 Ferry Olivier Propulsion or lift propeller for an aircraft
DE9013099U1 (en) * 1990-09-14 1991-11-07 Moser, Josef, 8058 Pretzen rotor
US5088665A (en) * 1989-10-31 1992-02-18 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Serrated trailing edges for improving lift and drag characteristics of lifting surfaces

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE420325C (en) * 1925-10-19 Constantin Muskalla Device for damping tip vortices on aircraft wings u. like
US1446011A (en) * 1921-07-05 1923-02-20 Jackson Robert Cattley Propeller
FR681633A (en) * 1928-09-12 1930-05-16 Improvements to lifting surfaces for aerial devices
GB329783A (en) * 1929-04-17 1930-05-29 Louis Henry Crook Improvements in or relating to aerodynamic wing control
FR794841A (en) * 1934-11-28 1936-02-26 Improvements made to surfaces working on fluids: propeller blades, planes of airplanes, etc.
US2800291A (en) * 1950-10-24 1957-07-23 Stephens Arthur Veryan Solid boundary surface for contact with a relatively moving fluid medium
DE6940421U (en) * 1969-10-13 1970-04-16 Heinrich Hennigs PROPELLER WITH REDUCED AIR RESISTANCE
US4067518A (en) * 1976-05-20 1978-01-10 Lockheed Corporation Drag reducer for lift surface of aircraft
DE2636056C2 (en) * 1976-08-11 1983-07-21 Rhein-Flugzeugbau GmbH, 4050 Mönchengladbach Blade for a rotor, in particular a propeller
DE2830371A1 (en) * 1977-07-18 1979-02-08 Roger A Thompson WING FLOW DEVICE
FR2639902A1 (en) * 1988-12-06 1990-06-08 Ferry Olivier Propulsion or lift propeller for an aircraft
US5088665A (en) * 1989-10-31 1992-02-18 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Serrated trailing edges for improving lift and drag characteristics of lifting surfaces
DE9013099U1 (en) * 1990-09-14 1991-11-07 Moser, Josef, 8058 Pretzen rotor

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19634296A1 (en) * 1996-08-24 1997-04-24 Erich Dipl Ing Ufer Aircraft fan jet propulsion unit
DE19634296C2 (en) * 1996-08-24 1999-04-22 Erich Dipl Ing Ufer Blower engine for aircraft with facilities for boundary layer extraction
DE19964114A1 (en) * 1999-12-31 2001-07-19 Dlr Ev Aerofoil section with lift-increasing trailing edge, in which trailing edge has spoilers on one or both sides to cause flow breakaway
DE10027938A1 (en) * 2000-05-31 2001-12-13 Dlr Ev Aerofoil section with lift-increasing trailing edge, in which trailing edge has spoilers on one or both sides to cause flow breakaway
US6733240B2 (en) * 2001-07-18 2004-05-11 General Electric Company Serrated fan blade
DE202009010904U1 (en) * 2009-08-17 2010-12-30 Becker Marine Systems Gmbh & Co. Kg Hydrofoils for watercraft
EP2567892A3 (en) * 2011-09-06 2015-08-19 Airbus Operations S.L. Aircraft tail surface with a leading edge section of undulated shape
WO2014109670A2 (en) * 2013-11-19 2014-07-17 Trubaev Nikolay Alekseevich Method and apparatus for achieving laminar flow of gas or liquid near cutting edges
WO2014109670A3 (en) * 2013-11-19 2014-10-23 Trubaev Nikolay Alekseevich Method and apparatus for achieving laminar flow of gas or liquid near cutting edges
CN106564585A (en) * 2016-10-26 2017-04-19 北京航空航天大学 High-performance deep-stall wing structure and aircraft
CN106564585B (en) * 2016-10-26 2019-12-10 北京航空航天大学 High-performance deep stall wing structure and aircraft
CN107226193A (en) * 2017-06-09 2017-10-03 昆明鞘翼科技有限公司 A kind of method for reducing aircraft fuselage flight resistance

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