DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Principle and applications of the background oriented schlieren (BOS) method

Richard, Hugues and Raffel, Markus (2001) Principle and applications of the background oriented schlieren (BOS) method. Measurement Science and Technology, Vol. 12 (9), pp. 1576-1585. Institute of Physics (IOP) Publishing. ISSN 0957-0233.

Full text not available from this repository.

Official URL: http://iopscience.iop.org/0957-0233/12/9/325


The practical aspects of an advanced schlieren technique, which has been presented by Meier (1999) and Richard et al (2000) and in a similar form by Dalziel et al (2000), are described in this paper. The application of the technique is demonstrated by three experimental investigations on compressible vortices. These vortices play a major role in the blade vortex interaction (BVI) phenomenon, which is responsible for the typical impulsive noise of helicopters. Two experiments were performed in order to investigate the details of the vortex formation from the blade tips of two different helicopters in flight: a Eurocopter BK117 and a large US utility helicopter. In addition to this, simultaneous measurements of velocity and density fields were conducted in a transonic wind tunnel in order to characterize the structure of compressible vortices. The background oriented schlieren technique has the potential of complementing other optical techniques such as shadowgraphy or focusing schlieren methods and yields additional quantitative information. Furthermore, in the case of helicopter aerodynamics, this technique allows the effect of Reynolds number on vortex development from blade tips to be studied in full-scale flight tests more easily than through the use of laser-based techniques.

Item URL in elib:https://elib.dlr.de/12397/
Document Type:Article
Additional Information: LIDO-Berichtsjahr=2002, Published: 16 August 2001, Online at: stacks.iop.org/MST/12/1576
Title:Principle and applications of the background oriented schlieren (BOS) method
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Journal or Publication Title:Measurement Science and Technology
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Volume:Vol. 12
Page Range:pp. 1576-1585
Publisher:Institute of Physics (IOP) Publishing
Keywords:fluid flow density, schlieren technique, flow visualization, transonic wind tunnel, flight testing, helicopter aerodynamics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Active Rotorcraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: DLR-Beauftragter, elib
Deposited On:17 Jan 2008
Last Modified:06 Sep 2019 15:28

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.