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Background Oriented Stereoscopic Schlieren Applied to a Helicopter in Flight

Richard, Hugues and Raffel, Markus and Meier, G.E.A (2000) Background Oriented Stereoscopic Schlieren Applied to a Helicopter in Flight. In: American Helicopter Society 56th Annual Forum, pp. 1-7. American Helicopter Society 56th Annual Forum, 2.-4. Mai 2000, Virginia Beach, VA, USA.

Full text not available from this repository.

Official URL: https://vtol.org/store/product/background-oriented-stereoscopic-schlieren-applied-to-a-helicopter-in-flight-4888.cfm

Abstract

In this paper we present a novel measurement technique based on the refractive index variation in a compressible flow field. This concept is referred to as "Background Oriented Schlieren" (BOS) in the following. The differences between BOS and other optical techniques which it can best be compared with, will be discussed. Experimental studies have been carried out to investigate the blade tip vortices of a BK117 helicopter in hover flight. An extension will be presented which uses two cameras placed in stereoscopic arrangement. Both techniques allow very easily to visualize compressible structures like tip vortices and seem to well complete other optical techniques like shadowgraph or schlieren, and additionally they give some quantitative informations.

Item URL in elib:https://elib.dlr.de/128019/
Document Type:Conference or Workshop Item (Speech)
Title:Background Oriented Stereoscopic Schlieren Applied to a Helicopter in Flight
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Richard, HuguesUNSPECIFIEDUNSPECIFIED
Raffel, MarkusMarkus.Raffel (at) dlr.dehttps://orcid.org/0000-0002-3340-9115
Meier, G.E.AUNSPECIFIEDUNSPECIFIED
Date:2000
Journal or Publication Title:American Helicopter Society 56th Annual Forum
Refereed publication:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-7
Status:Published
Keywords:Background oriented schlieren (BOS), BK117 helicopter
Event Title:American Helicopter Society 56th Annual Forum
Event Location:Virginia Beach, VA, USA
Event Type:international Conference
Event Dates:2.-4. Mai 2000
Organizer:American Helicopter Society (AHS)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Virtual Aerodynamic Rotorcraft
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Winkels, Elisabeth
Deposited On:12 Jul 2019 10:06
Last Modified:12 Jul 2019 10:06

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