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Background oriented stereoscopic schlieren (BOSS) for full-scale helicopter vortex characterization

Raffel, M. and Tung, C. and Richard, H. and Yu, Y. and Meier, G.E.A (2000) Background oriented stereoscopic schlieren (BOSS) for full-scale helicopter vortex characterization. In: The Millennium 9th International Symposium on Flow Visualization, Conference Proceedings, 450-1-450-11. CD. 9th International Symposium on Flow Visualization, Heriot-Watt University, Edinburgh, UK, August 2000. ISBN 0-9533991-17

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Abstract

In this paper we present the application of a novel schlieren technique for two different helicopter tests. The optical method is referred to as “Background Oriented Schlieren” (BOS) in the following. Additionally the differences between BOS and an extension of it, the reference-free stereoscopic arrangement (BOSS in the following), will be discussed. Experimental studies have been carried out to investigate details of the vortex generation next to the blade tips of two different helicopters, an Eurocopter BK117 and an Sikorsky UH60. The background oriented techniques seem to well complete other optical techniques like shadowgraphy or focussing schlieren methods and yield additional quantitative information. Furthermore, they allow - in contrast to laser based techniques - to study the Reynolds-number depending vortex development in full-scale flight tests more easily.

Item URL in elib:https://elib.dlr.de/13826/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2003, monograph_id=Paper 450,
Title:Background oriented stereoscopic schlieren (BOSS) for full-scale helicopter vortex characterization
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Raffel, M.UNSPECIFIEDUNSPECIFIED
Tung, C.Aeromechanics Branch, Army/NASA Rotorcraft DivisionUNSPECIFIED
Richard, H.UNSPECIFIEDUNSPECIFIED
Yu, Y.Aeromechanics Branch, Army/NASA Rotorcraft DivisionUNSPECIFIED
Meier, G.E.AUNSPECIFIEDUNSPECIFIED
Date:2000
Journal or Publication Title:The Millennium 9th International Symposium on Flow Visualization
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Conference Proceedings
Page Range:450-1-450-11
Editors:
EditorsEmail
Carlomagno, G.M.UNSPECIFIED
Grant, I.UNSPECIFIED
Publisher:CD
ISBN:0-9533991-17
Status:Published
Keywords:density, visualization, background, schlieren, full-scale, vortex, helicopter
Event Title:9th International Symposium on Flow Visualization, Heriot-Watt University, Edinburgh, UK, August 2000
Organizer:University Edinburgh
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik
Deposited By: DLR-Beauftragter, elib
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 21:01

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