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Damping of the Second Mode Instability on a Cone in Hypersonic Flow

Willems, Sebastian and Gülhan, Ali (2011) Damping of the Second Mode Instability on a Cone in Hypersonic Flow. In: Proceedings of the 7th European Symposium on Aerothermodynamics. ESA Communications. 7th European Symposium on Aerothermodynamics, 9.-12. Mai 2011, Brügge, Belgien. ISBN 978-92-9221-256-8. ISSN 1609-042X

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Abstract

This paper presents the results of transition experiments with a 3° half angle cone at Mach 6. The transition position was measured with an infrared camera and simultaneously the pressure fluctuations in the boundary layer with high speed pressure sensors. A segment with regular micro pores causes a measurable damping of the pressure fluctuations in the boundary layer (Mack modes) but no transition delay. In addition the influence of the nose radius, of the unit Reynolds number and of the free stream temperature on the transition as well as the pressure fluctuations is investigated.

Document Type:Conference or Workshop Item (Paper)
Title:Damping of the Second Mode Instability on a Cone in Hypersonic Flow
Authors:
AuthorsInstitution or Email of Authors
Willems, Sebastiansebastian.willems@dlr.de
Gülhan, AliAli.Guelhan@dlr.de
Date:August 2011
Journal or Publication Title:Proceedings of the 7th European Symposium on Aerothermodynamics
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmail
Ouwehand, L.UNSPECIFIED
Publisher:ESA Communications
ISSN:1609-042X
ISBN:978-92-9221-256-8
Status:Published
Keywords:transition; Mack mode; damping; slender cone;
Event Title:7th European Symposium on Aerothermodynamics
Event Location:Brügge, Belgien
Event Type:international Conference
Event Dates:9.-12. Mai 2011
Organizer:European Space Agency
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 - Projekt IMENS-3C (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: Sebastian Willems
Deposited On:13 Jan 2012 07:58
Last Modified:13 Jan 2012 07:58

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