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Water Crowns in Pulsed Jets

Grabitz, A. and Grabitz, G. (1) and Meier, G.E.A. (1993) Water Crowns in Pulsed Jets. Atlas of Visualization, Progress in Visualization, Vol. 1 (1992) p. 7-18 (Edited by the Visualization Society of Japan), Pergamon Press, 1993, 1, pp. 7-18. Pergamon Press, Tokyo, Japan.

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Experiments were carried out on water jets with an initial velocity perturbation emerging from nozzles with radii R a between 1.5 to 2.5 mm. The mean velocity U was 2.0 to 4.3 m/s. The Weber numbers (We &#61 rho RaU/sigma; rho density; sigma surface tension) were between 140 and 400. A special distortion mechanism produced velocity modulations which were close to being sinusoidal while theiramplitudes were of the order of the mean velocity. The decomposing jets which on first sight seem to have a chaotic structure show a very periodic behavior if stroboscopic visualization is used. Photographic pictures of the jets were compated with the authors kinematic wave therory which neglects the surface tension.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=1993,
Title:Water Crowns in Pulsed Jets
AuthorsInstitution or Email of Authors
Grabitz, G. (1)UNSPECIFIED
Journal or Publication Title:Atlas of Visualization, Progress in Visualization, Vol. 1 (1992) p. 7-18 (Edited by the Visualization Society of Japan), Pergamon Press, 1993
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 7-18
Publisher:Pergamon Press, Tokyo, Japan
Keywords:Water crowns, water jets, velocity perturbation, nozzles, Weber numbers, velocity modulations, kinematic wave theorey, surface tension
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L TG - Querschnittstechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik > Institut für Experimentelle Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:07

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