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Experimental investigations of the influence of axial jets on 2- and 4-vortex systems

Konrath, Robert and Carmer, Carl F. v. and Vollmers, Heinrich and Shuoqiao, Huang (2008) Experimental investigations of the influence of axial jets on 2- and 4-vortex systems. DLR-Forschungsbericht. DLR-FB-2008-15. DLR.

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Abstract

The effects of jets on wake vortices were investigated experimentally in a towing tank. Considered are two cases of 4-vortex systems consisting of two counter-rotating vortex pairs. For a comparisons, the corresponding 2-vortex system is also considered, too. The used vortex generator consisting of one or two rectangular wings was equipped with two pressurized water jet nozzles. Two different jet strengths were used, resulting in parameter valuess of R (ratio between jet thrust and vortex strength) of 0.2 and 0.74. Cross-plane velocity fields were determined by means of Stereo-PIV. The jet/vortex interactions are discussed, as well as the influence of the jets on the occurrence of an interaction between inner and outer vortices in the near far field, which is presumed to lead to a more rapid decay of the wing vortices

Document Type:Monograph (DLR-Forschungsbericht)
Additional Information:Kapitel für Forschungsbericht der Abteilung EV von Seite 27 bis 40
Title:Experimental investigations of the influence of axial jets on 2- and 4-vortex systems
Authors:
AuthorsInstitution or Email of Authors
Konrath, RobertUNSPECIFIED
Carmer, Carl F. v.UNSPECIFIED
Vollmers, HeinrichUNSPECIFIED
Shuoqiao, HuangBUAA, Beijing, CHN
Date:2008
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 27-40
Editors:
EditorsEmail
Holzäpfel, Frank (Ed.)UNSPECIFIED
Gerz, Thomas (Prj. Mng.)UNSPECIFIED
Publisher:DLR
ISSN:1434-8454
Status:Published
Keywords:wake vortices, Wirbelschleppe, jets
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:15 Sep 2008
Last Modified:27 Apr 2009 14:58

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