DEP0048974DA - Device for vortex control in bodies in flow - Google Patents
Device for vortex control in bodies in flowInfo
- Publication number
- DEP0048974DA DEP0048974DA DEP0048974DA DE P0048974D A DEP0048974D A DE P0048974DA DE P0048974D A DEP0048974D A DE P0048974DA
- Authority
- DE
- Germany
- Prior art keywords
- flow
- bodies
- vortex control
- trailing edge
- axes
- 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
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Description
h ^m ^Mu^ Um Wirbelregelung bei umströmten Körpern. :; h ^ m ^ Mu ^ Um vortex control in bodies in flow . : ;
Hinter umströmten Körpern entstehen bei zunehmend konvexer Krümmung oft Ablösungswirbel,- deren Aohsen senkrecht zur Strömung und parallel zur Körperoberfläche liegenyund welche den Körperwiderstand vergrößern, Vibrationen oder Auskolkungen verursachen oder sonstige Schäden bewirken können, · wie' dies;ζ»B. 'besonders ausgeprägt bei runden,in der Strömung stehenden Eohren oder Stangen der Fall ist». - _With increasingly convex curvature, separation vortices often arise behind bodies in a flow - their axes perpendicular to the flow and parallel to the body surface and which increase the body resistance, cause vibrations or scouring or other damage, like 'this; ζ »B. 'is particularly pronounced in round ears or rods standing in the current ». - _
,Die'neue Yorrichtung 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'vor- \ '. her .beschriebenen Mängel weitgehend behoben werden.The purpose of the new device is to create such large and often discontinuous vortices of separation with their perpendicular to the flow to dissolve the standing axis into smaller, constant vortex filaments with axes directed parallel to the flow, whereby the \ '. her .described deficiencies are largely remedied.
Konstruktiv kann dies - auf verschiedene Weise dadurch erreicht werden, daß man die bei symmetrischen Körpexn .beider- * seitig gleichförmige Krümmung1 wechselseitig streifenweise vermindert, sc|daß senkrecht zur Strömung eine wellenförmige oder # zackige Oberfläche am hinteren Ende des- umströmten Körpers ' entsteht . · - 'Constructively, this can be achieved in different ways by reducing the curvature 1, which is uniform on both sides, in alternating stripes, so that perpendicular to the flow, a wavy or jagged surface is created at the rear end of the body around which the flow is flowing . · - '
Auf der Zeichnung.ist in Abbildung a dargestellt, wie bei einem Körper von elliptischem Querscimitt .die großen Wir-. bei mit zur Strömung ■ senkrechten: Achsen sich "wechselseitig unstetig ablösen. : In Abbildung b ist der gleiche. Körper mit einer " Ausbildung seines hinteren Endes- nach dem .Erfindungsgedanken dargestellt und in Abbildung, e, welche eine Ansicht des Körpers von hinten zeigt, ist. die wechselseitige, aber, stetige Bildung der kleinen .Wirbelf ädeh mit zur Strömung parallelen : Achsen dargestellt. -^A-te^Ki^ ' - ■ '': In the drawing. Is shown in Figure a, how in a body with an elliptical cross-section, the large we-. in the case of axes perpendicular to the flow: axes "detach alternately in a discontinuous manner.: In Figure b the same. body is shown with a" formation of its rear end according to the idea of the invention and in Figure, e, which shows a view of the body from behind , is. the reciprocal, but, continuous formation of the small .Wirbelf ädeh parallel to the flow: shown axes. - ^ A-th ^ Ki ^ '- ■'':
gez. Br. Günther Kempf "- , .signed Br. Günther Kempf "-,.
Claims (2)
Family
ID=
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