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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. (2015) Free transition on a slender cone in a quiet and a conventional wind tunnel and the effect of ultrasonically absorptive materials. In: 6th European Conference for Aeronautics and Space Sciences (446), pp. 1-14. 6th European Conference for Aeronautics and Space Sciences, 29. Juni - 2. Juli 2015, Krakau, Polen.

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Official URL: http://www.eucass2015.eu/detailed-programme/

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 influence onto the transition process. Experiments performed with the same 3° half angle cone in a conventional and a quiet wind tunnel at Mach 6 justify this approach. The formation, amplification and destruction of second (Mack) modes is compared based on high-speed pressure measurements. In addition damping these modes with ultrasonically absorptive surfaces was tested.

Item URL in elib:https://elib.dlr.de/97936/
Document Type:Conference or Workshop Item (Speech)
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.deUNSPECIFIED
Gülhan, AliAli.Guelhan (at) dlr.deUNSPECIFIED
Ward, Christopher A.Purdue UniversityUNSPECIFIED
Schneider, Steven P.Purdue UniversityUNSPECIFIED
Date:June 2015
Journal or Publication Title:6th European Conference for Aeronautics and Space Sciences
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-14
Series Name:Conference Proceedings on USB-Stick
Status:Published
Keywords:Transition, Kegel, Hyperschall, Experiment
Event Title:6th European Conference for Aeronautics and Space Sciences
Event Location:Krakau, Polen
Event Type:international Conference
Event Dates:29. Juni - 2. Juli 2015
Organizer:EUCASS association
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 of Aerodynamics and Flow Technology > Über- und Hyperschalltechnologien
Deposited By: Willems, Sebastian
Deposited On:19 Aug 2015 13:51
Last Modified:31 Jul 2019 19:54

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