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Free transition on a slender cone in a quiet and a conventional wind tunnel and the effect of ultrasonically absorptive materials

Willems, Sebastian and Gülhan, Ali and Ward, Christopher A. and Schneider, Steven P. (2017) Free transition on a slender cone in a quiet and a conventional wind tunnel and the effect of ultrasonically absorptive materials. In: Progress in Flight Physics EUCASS Book Series – Advances in AeroSpace Sciences, 9. Torus Press. pp. 497-516. ISBN 978-5-94588-215-7. ISSN 10.1051/eucass/2016090497

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Official URL: https://doi.org/10.1051/eucass/2016090497

Abstract

Transition from laminar to turbulent hypersonic boundary layers is the topic of several research projects world-wide. Most experimental work is done in conventional wind tunnels, although their free stream turbulence does not match free flight conditions and has a significant in§uence onto the transition process. Experiments performed with the same 3 degree half angle cone in a conventional and a quiet wind tunnel at Mach 6 justify this approach. The formation, amplification, and decay of the second (Mack) modes is compared based on high-frequency pressure measurements. In addition, damping of these modes with ultrasonically absorptive surfaces was tested.

Item URL in elib:https://elib.dlr.de/113891/
Document Type:Contribution to a Collection
Title:Free transition on a slender cone in a quiet and a conventional wind tunnel and the effect of ultrasonically absorptive materials
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Willems, SebastianSebastian.Willems (at) dlr.dehttps://orcid.org/0000-0002-5576-7829
Gülhan, AliAli.Guelhan (at) dlr.deUNSPECIFIED
Ward, Christopher A.purdue universityUNSPECIFIED
Schneider, Steven P.purdue universityUNSPECIFIED
Date:2017
Journal or Publication Title:Progress in Flight Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:9
Page Range:pp. 497-516
Editors:
EditorsEmail
Knight, Doyle D.UNSPECIFIED
Bondar, YevgeniyUNSPECIFIED
Lipatov, Igor I.UNSPECIFIED
Reijasse, PhilippeUNSPECIFIED
Publisher:Torus Press
Series Name:EUCASS Book Series – Advances in AeroSpace Sciences
ISSN:10.1051/eucass/2016090497
ISBN:978-5-94588-215-7
Status:Published
Keywords:hypersonic, transition, slender cone, ultrasonically absorptive material
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Raumfahrzeugsysteme - Konzepte und Entwurf
Location: Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Supersonoc and Hypersonic Technology
Deposited By: Willems, Sebastian
Deposited On:11 Sep 2017 14:24
Last Modified:31 Jul 2019 20:11

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