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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 DE19924208751 DE4208751A DE4208751A1 DE 4208751 A1 DE4208751 A1 DE 4208751A1 DE 19924208751 DE19924208751 DE 19924208751 DE 4208751 A DE4208751 A DE 4208751A DE 4208751 A1 DE4208751 A1 DE 4208751A1
Authority
DE
Grant status
Application
Patent type
Prior art keywords
teeth
section
edge
trailing
air
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
DE19924208751
Other languages
German (de)
Inventor
Fritz Karl Hausser
Original Assignee
Fritz Karl Hausser
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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C3/00Wings
    • B64C3/10Shape of wings
    • B64C3/14Aerofoil profile
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63HMARINE PROPULSION OR STEERING
    • B63H1/00Propulsive elements directly acting on water
    • B63H1/02Propulsive elements directly acting on water of rotary type
    • B63H1/12Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14Propellers
    • B63H1/26Blades
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C21/00Influencing air-flow over aircraft surfaces by affecting boundary-layer flow
    • B64C21/02Influencing air-flow over aircraft surfaces by affecting boundary-layer flow by use of slot, ducts, porous areas, or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C3/00Wings
    • B64C3/10Shape of wings
    • B64C3/14Aerofoil profile
    • B64C2003/146Aerofoil profile comprising leading edges of particular shape
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C2230/00Boundary layer controls
    • B64C2230/20Boundary layer controls by passively inducing fluid flow, e.g. by means of a pressure difference between both ends of a slot or duct
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00Aeronautics or air transport
    • Y02T50/10Drag reduction
    • Y02T50/16Drag reduction by influencing airflow
    • Y02T50/166Drag reduction by influencing airflow by influencing the boundary layer

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

Titel title

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 that work with the same principle as in the application P 42 06 066.4.

Stand der Technik State of the art

Rotoren von Jet-Antriebswerke, Ventilatoren, Boote, Flugzeuge, etc. haben gerade Kanten. Rotors of jet-propulsion plants, fans, boats, planes, etc. straight edges.

Problem problem

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

Erzielbare Vorteile achievable benefits

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. The advantages achieved with the invention consist in particular in that the front toothed edge of a body intersects the gentle air or water and / or the serrated trailing edge reduces the formation of vortices. Dadurch wird die Leistung deutlich verbessert. This performance is significantly improved. Form, Länge, Breite, Abstand und Ausrichtung der Zähne sowie die Anzahl der Zahnreihen hängt von der Größe und Geschwindigkeit des Körpers ab. Shape, length, width, spacing and orientation of the teeth as well as the number of rows of teeth will depend on the size and speed of the body.

Ausführungsbeispiel embodiment

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 illustrated in the drawings of the applications P 42 06 066.4 and P 42 08 751.1.

Claims (1)

  1. Oberbegriff: Preamble:
    Gezahnte Fronten, Kanten oder Ränder von Körpern. Toothed fronts, edges, or edges of bodies.
    Kennzeichnender Teil: Signing part:
    Vordere und/oder hintere gezahnte Rand eines Körpers zur Verringerung des Wasser- bzw. Luftwiderstandes. Front and / or rear toothed edge of a body for reducing the water or air resistance.
DE19924208751 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 (2)

Application Number Priority Date Filing Date Title
DE19924206066 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
DE19924208751 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 (1)

Application Number Priority Date Filing Date Title
DE19924208751 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 true DE4208751A1 (en) 1993-11-11

Family

ID=25912266

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19924208751 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 (7)

* 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 Hydrofoil 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

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 the damping of vortices at the edge of aircraft wings u. like.
FR681633A (en) * 1928-09-12 1930-05-16 Improvements to lifting surfaces for air 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 to working surfaces on fluids: propeller blades, plans 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 Propellers with reduced drag
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 Tragfluegelauftriebsvorrichtung
DE2636056C2 (en) * 1976-08-11 1983-07-21 Rhein-Flugzeugbau Gmbh, 4050 Moenchengladbach, De
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, De
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 the damping of vortices at the edge of 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 air 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 to working surfaces on fluids: propeller blades, plans 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 Propellers with reduced drag
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 Moenchengladbach, De
DE2830371A1 (en) * 1977-07-18 1979-02-08 Roger A Thompson Tragfluegelauftriebsvorrichtung
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, De

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
DE19634296C2 (en) * 1996-08-24 1999-04-22 Erich Dipl Ing Ufer Blower engine for aircraft with facilities for boundary layer suction
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 Hydrofoil 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

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