DE822352C - Device for vortex control in bodies flowed around - Google Patents

Device for vortex control in bodies flowed around

Info

Publication number
DE822352C
DE822352C DEP48974A DEP0048974A DE822352C DE 822352 C DE822352 C DE 822352C DE P48974 A DEP48974 A DE P48974A DE P0048974 A DEP0048974 A DE P0048974A DE 822352 C DE822352 C DE 822352C
Authority
DE
Germany
Prior art keywords
flow
vortex control
bodies
flowed around
rear 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.)
Expired
Application number
DEP48974A
Other languages
German (de)
Inventor
Dr-Ing Guenther Kempf
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.)
GUENTHER KEMPF DR ING
Original Assignee
GUENTHER KEMPF DR ING
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 GUENTHER KEMPF DR ING filed Critical GUENTHER KEMPF DR ING
Priority to DEP48974A priority Critical patent/DE822352C/en
Application granted granted Critical
Publication of DE822352C publication Critical patent/DE822352C/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15DFLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00Influencing flow of fluids
    • F15D1/10Influencing flow of fluids around bodies of solid material
    • F15D1/12Influencing flow of fluids around bodies of solid material by influencing the boundary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/56Towing or pushing equipment
    • B63B21/66Equipment specially adapted for towing underwater objects or vessels, e.g. fairings for tow-cables
    • B63B21/663Fairings

Description

Hinter umströmten Körpern entstehen bei zunehmend konvexer Krümmung oft Ablösungswirbel, deren Achsen senkrecht zur Strömung und parallel zur Körperoberfläche liegen und welche den Körperwiderstand vergrößern, Vibrationen oder AAuskolkungen verursachen oder sonstige Schäden bewirken können, wie dies z. B. besonders ausgeprägt bei runden, in der Strömung stehenden Rohren oder Stangen der Fall ist.Behind bodies in a flow arise with increasingly convex curvature often separation vortices, the axes of which are perpendicular to the flow and parallel to the body surface and which increase body resistance, vibrations or bulges cause or cause other damage, such as B. particularly pronounced is the case with round pipes or rods standing in the flow.

Die neue Vorrichtung dient dazu, derartige große und oft unstetige Ablösungswirbel mit ihrer senkrecht zur Strömung stehenden Achse in kleinere, stetige Wirbelfäden mit parallel zur Strömung gerichteten Achsen aufzulösen, wodurch die vorher beschriebenen Mängel weitgehend behoben werden.The new device is used to such large and often discontinuous Separation vortices with their axis perpendicular to the flow into smaller, steady ones To dissolve vortex filaments with axes directed parallel to the flow, whereby the previously described deficiencies are largely eliminated.

Konstruktiv kann dies auf verschiedene Weise dadurch erreicht werden, daß man die bei symmetrischen Körpern beiderseitig gleichförmige Krümmung wechselseitig streifenweise vermindert, so daß senkrecht zur Strömung eine wellenförmige oder zackige Oberfläche am hinteren Ende des umströmten Körpers entsteht.Constructively, this can be achieved in various ways by that the curvature, which is uniform on both sides in symmetrical bodies, is reciprocal in strips reduced, so that a wave-shaped or perpendicular to the flow jagged surface at the rear end of the flow around the body arises.

In der Zeichnung ist in Alb. a dargestellt, wie bei einem Körper von elliptischem Querschnitt die großen Wirbel mit zur Strömung senkrechten Achsen sich wechselseitig unstetig ablösen. In Abb. b ist der gleiche Körper mit einer Ausbildung seines hinteren Endes nach dem Erfindungsgedanken dargestellt, und in Abb. c, welche eine Ansicht des Körpers von hinten zeigt, ist die wechselseitige, aber stetige Bildung der kleinen Wirbelfäden mit zur Strömung parallelen Achsen dargestellt.In the drawing is in Alb. a shown as with a body of elliptical cross-section the large eddies with axes perpendicular to the flow alternately detaching discontinuously. In Fig. B is the same body with a training its rear end according to the idea of the invention, and in Fig. c, which a view of the body from behind shows is reciprocal but steady Formation of the small vortex filaments shown with axes parallel to the flow.

Claims (3)

PATENTANSPRÜCHE: i. Vorrichtung zur Wirbelregelung bei umströmten Körpern, an deren hinterem Teil die Strömung sich ablöst, dadurch gekennzeichnet, daß die Hinterkante des Körpers so ausgebildet wird, daß sie von der Mittellinie nach beiden Seiten wechselnd abweicht. PATENT CLAIMS: i. Device for vortex control in bodies in flow, at the rear part of which the flow separates, characterized in that the rear edge of the body is designed in such a way that it deviates alternately from the center line to both sides. 2. Vorrichtung nach Anspruch i, dadurch gekennzeichnet, daß hinter einem runden Körper eine Hinterkante angebracht ist. 2. Device according to claim i, characterized in that that a rear edge is attached behind a round body. 3. Vorrichtung nach Anspruch i und 2, dadurch gekennzeichnet, daß die Hinterkante sich um die Achse des Körpers drehen kann.3. Device according to Claims i and 2, characterized in that the rear edge rotates around the axis of the body can rotate.
DEP48974A 1949-07-15 1949-07-15 Device for vortex control in bodies flowed around Expired DE822352C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP48974A DE822352C (en) 1949-07-15 1949-07-15 Device for vortex control in bodies flowed around

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP48974A DE822352C (en) 1949-07-15 1949-07-15 Device for vortex control in bodies flowed around

Publications (1)

Publication Number Publication Date
DE822352C true DE822352C (en) 1951-11-26

Family

ID=7383414

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP48974A Expired DE822352C (en) 1949-07-15 1949-07-15 Device for vortex control in bodies flowed around

Country Status (1)

Country Link
DE (1) DE822352C (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0269893A1 (en) * 1986-11-05 1988-06-08 Maschinenbau Gabler GmbH Retractable antenna mast particularly for submarines
US4776535A (en) * 1986-12-29 1988-10-11 United Technologies Corporation Convoluted plate to reduce base drag
US4789117A (en) * 1986-12-29 1988-12-06 United Technologies Corporation Bodies with reduced base drag
US4813633A (en) * 1986-12-29 1989-03-21 United Technologies Corporation Airfoil trailing edge
US4813635A (en) * 1986-12-29 1989-03-21 United Technologies Corporation Projectile with reduced base drag
US4830315A (en) * 1986-04-30 1989-05-16 United Technologies Corporation Airfoil-shaped body
DE202009010904U1 (en) * 2009-08-17 2010-12-30 Becker Marine Systems Gmbh & Co. Kg Hydrofoils for watercraft
ITBO20110381A1 (en) * 2011-06-29 2012-12-30 Calzoni Srl SUBMERSIBLE AND LIFTING ROD FOR SUCH AS SUBMERSIBLE

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4830315A (en) * 1986-04-30 1989-05-16 United Technologies Corporation Airfoil-shaped body
EP0269893A1 (en) * 1986-11-05 1988-06-08 Maschinenbau Gabler GmbH Retractable antenna mast particularly for submarines
US4776535A (en) * 1986-12-29 1988-10-11 United Technologies Corporation Convoluted plate to reduce base drag
US4789117A (en) * 1986-12-29 1988-12-06 United Technologies Corporation Bodies with reduced base drag
US4813633A (en) * 1986-12-29 1989-03-21 United Technologies Corporation Airfoil trailing edge
US4813635A (en) * 1986-12-29 1989-03-21 United Technologies Corporation Projectile with reduced base drag
DE202009010904U1 (en) * 2009-08-17 2010-12-30 Becker Marine Systems Gmbh & Co. Kg Hydrofoils for watercraft
ITBO20110381A1 (en) * 2011-06-29 2012-12-30 Calzoni Srl SUBMERSIBLE AND LIFTING ROD FOR SUCH AS SUBMERSIBLE

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