DE10105442A1 - Surface structures to reduce air flow resistance are like dots in golf ball in shape and size, depressed or raised, with macroscopic dimensions in mm to cm region - Google Patents

Surface structures to reduce air flow resistance are like dots in golf ball in shape and size, depressed or raised, with macroscopic dimensions in mm to cm region

Info

Publication number
DE10105442A1
DE10105442A1 DE2001105442 DE10105442A DE10105442A1 DE 10105442 A1 DE10105442 A1 DE 10105442A1 DE 2001105442 DE2001105442 DE 2001105442 DE 10105442 A DE10105442 A DE 10105442A DE 10105442 A1 DE10105442 A1 DE 10105442A1
Authority
DE
Germany
Prior art keywords
dots
raised
shape
golf ball
surface structures
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.)
Withdrawn
Application number
DE2001105442
Other languages
German (de)
Inventor
Joerg Renner
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
Application filed by Individual filed Critical Individual
Priority to DE2001105442 priority Critical patent/DE10105442A1/en
Publication of DE10105442A1 publication Critical patent/DE10105442A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
    • F42B10/38—Range-increasing arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C21/00—Influencing air flow over aircraft surfaces by affecting boundary layer flow
    • B64C21/10—Influencing air flow over aircraft surfaces by affecting boundary layer flow using other surface properties, e.g. roughness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/02—Influencing flow of fluids in pipes or conduits
    • F15D1/06—Influencing flow of fluids in pipes or conduits by influencing the boundary layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/10—Influencing flow of fluids around bodies of solid material
    • F15D1/12—Influencing flow of fluids around bodies of solid material by influencing the boundary layer
    • 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

Abstract

The surface structures are like the dots in a golf ball in shape and size, depressed or raised, with macroscopic dimensions in the mm to cm region, so that a turbulent boundary layer forms, offset from where the breakaway point would otherwise be in such a manner that less energy goes into the vortex area and the flow resistance is reduced.

Description

Der Stand der Technik sagt, daß glatt polierte Oberflächen Gasströmungen einen geringen Widerstand entgegensetzen.The prior art says that smooth polished gas flows oppose little resistance.

Neuere Untersuchungen ließen vermuten, daß Oberflächenstrukturen, nahezu mikroskopisch klein wie auf der Haut und den Schuppen von Fischen entdeckt, den Strömungswiderstand vermindern könnten. Der Erfolg war jedoch mäßig, da der Einfluß der laminaren Unterströmung auf den Gesamtwiderstand gering ist.Recent studies have suggested that surface structures, almost microscopic as on the skin and scales of fish discovered that the flow resistance could decrease. The success was however moderate, since the influence of the laminar underflow on the Overall resistance is low.

Verwendet man jedoch bei Flugzeugen, Raketen, Geschossen und anderen schnell bewegte Gegenständen, Oberflächenstrukturen die in Form und Größe den "dots" der Golfbälle entsprechen bzw. mit ihnen vergleichbar sind, d. h. deren Dimensionen also makroskopisch im Millimeter- bzw. Zentimeterbereich liegen, dann bildet sich an diesen Strukturen eine turbulente Strömungsgrenzschicht aus, die den bisherigen Ablösepunkt z. B. an der Tragfläche eines Flugzeuges verlagert und dadurch dem Wirbelgebiet weniger Energie zuführt.However, it is used on airplanes, missiles, projectiles and others fast moving objects, surface structures in shape and size correspond to or are comparable to the "dots" of golf balls, d. H. their dimensions are macroscopic in the millimeter or centimeter range then turbulent forms on these structures Flow boundary layer from the previous separation point z. B. at the Wing of an aircraft relocated and therefore less the vortex area Supplies energy.

Die Folge ist eine Verminderung des gesamten Luftwiderstandes bzw. des Strömungswiderstandes des von Gasen umströmten Gegenstandes.The result is a reduction in the total air resistance or Flow resistance of the object around which gases flow.

Versieht man die Oberfläche der gasumströmten Körper mit Schuppen, Lamellen oder gar beliebigen Formen, jedoch ähnlicher Größe, dann stellt sich ein entsprechender Effekt ein.If you provide the surface of the gas-flowed body with scales, Slats or any shape, but of similar size, then arises a corresponding effect.

Maßgebend ist wiederum, daß auch diese Strukturen in ihren Ausmaßen im makroskopischen Bereich liegen.It is again decisive that these structures also have their dimensions in the macroscopic range.

Alle Strukturen sind entsprechend den Strömungsgeschwindigkeiten, noch in ihren Ausmaßen zu optimieren.All structures are still in according to the flow velocities optimize their dimensions.

Die Vorteile dieser Oberflächenstrukturen, ob vertieft oder erhaben, liegen klar auf der Hand: Die Verminderung des Strömungswiderstandes vermindert den Energieeinsatz.The advantages of these surface structures, whether deepened or raised, are clear on hand: The reduction in flow resistance reduces the Energy.

Claims (1)

Oberflächenstrukturen zur Verminderung des Luftwiderstandes bei Flugzeugen, Raketen, Geschossen und anderen, schnell bewegten Gegenständen und Fahrzeugen, sowie bei gasdurchströmten Rohrleitungen, dadurch gekennzeichnet, daß diese Strukturen in Form und Ausmaß ähnlich oder vergleichbar den "dots" bei einem Golfball, vertieft oder erhaben, makroskopische Dimensionen im Millimeter- bzw. Zentimeterbereich aufweisen.Surface structures for reducing the air resistance in airplanes, rockets, projectiles and other, rapidly moving objects and vehicles, as well as in gas-flowed pipelines, characterized in that these structures are similar or comparable in shape and extent to the "dots" in a golf ball, deepened or raised, Have macroscopic dimensions in the millimeter or centimeter range.
DE2001105442 2001-02-07 2001-02-07 Surface structures to reduce air flow resistance are like dots in golf ball in shape and size, depressed or raised, with macroscopic dimensions in mm to cm region Withdrawn DE10105442A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2001105442 DE10105442A1 (en) 2001-02-07 2001-02-07 Surface structures to reduce air flow resistance are like dots in golf ball in shape and size, depressed or raised, with macroscopic dimensions in mm to cm region

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2001105442 DE10105442A1 (en) 2001-02-07 2001-02-07 Surface structures to reduce air flow resistance are like dots in golf ball in shape and size, depressed or raised, with macroscopic dimensions in mm to cm region

Publications (1)

Publication Number Publication Date
DE10105442A1 true DE10105442A1 (en) 2002-08-22

Family

ID=7673099

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2001105442 Withdrawn DE10105442A1 (en) 2001-02-07 2001-02-07 Surface structures to reduce air flow resistance are like dots in golf ball in shape and size, depressed or raised, with macroscopic dimensions in mm to cm region

Country Status (1)

Country Link
DE (1) DE10105442A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020002367A1 (en) 2020-04-20 2021-10-21 Jörg Schulz Air resistance reduction by means of microturbulence-generating surfaces on airships

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8430377U1 (en) * 1984-10-16 1985-05-02 Hüßner, Joachim, 5163 Langerwehe BODY FOR FAST GROUND VEHICLES
US5171623A (en) * 1990-12-27 1992-12-15 Yee Norman D Drag reducing surface depressions
US5200573A (en) * 1991-05-28 1993-04-06 Blood Charles L Projectile having a matrix of cavities on its surface
US5540406A (en) * 1993-10-25 1996-07-30 Occhipinti; Anthony C. Hydrofoils and airfoils
DE19613304A1 (en) * 1996-04-03 1997-10-09 Ernst Koelle Upper surface structure for outer skin of bodies in flow medium
US6131853A (en) * 1999-06-09 2000-10-17 Bauer; Steven X. S. Micro-drag generators for aerodynamic and hydrodynamic braking and control

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8430377U1 (en) * 1984-10-16 1985-05-02 Hüßner, Joachim, 5163 Langerwehe BODY FOR FAST GROUND VEHICLES
US5171623A (en) * 1990-12-27 1992-12-15 Yee Norman D Drag reducing surface depressions
US5200573A (en) * 1991-05-28 1993-04-06 Blood Charles L Projectile having a matrix of cavities on its surface
US5540406A (en) * 1993-10-25 1996-07-30 Occhipinti; Anthony C. Hydrofoils and airfoils
DE19613304A1 (en) * 1996-04-03 1997-10-09 Ernst Koelle Upper surface structure for outer skin of bodies in flow medium
US6131853A (en) * 1999-06-09 2000-10-17 Bauer; Steven X. S. Micro-drag generators for aerodynamic and hydrodynamic braking and control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020002367A1 (en) 2020-04-20 2021-10-21 Jörg Schulz Air resistance reduction by means of microturbulence-generating surfaces on airships

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