DE822352C - Device for vortex control in bodies flowed around - Google Patents
Device for vortex control in bodies flowed aroundInfo
- 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
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/56—Towing or pushing equipment
- B63B21/66—Equipment specially adapted for towing underwater objects or vessels, e.g. fairings for tow-cables
- B63B21/663—Fairings
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)
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)
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 |
-
1949
- 1949-07-15 DE DEP48974A patent/DE822352C/en not_active Expired
Cited By (8)
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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