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An Experimental Study on Heat-Flux Reduction by Electromagnetic Fields in Ionized Flows

Gülhan, Ali and Esser, Burkard and Koch, Uwe and Siebe, Frank and Riehmer, Johannes and Giordano, Domenico and Konigorski, Detlev (2009) An Experimental Study on Heat-Flux Reduction by Electromagnetic Fields in Ionized Flows. In: Proceedings of CEAS 2009 European Air and Space Conference. CEAS 2009 European Air and Space Conference, 26.-29. Oktober 2009, Manchester, England.

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Abstract

In the frame of this work an experimental study has been performed on heat-flux mitigation within high-enthalpy ionized-argon flows by application of an external magnetic-induction field. Two different axially symmetric test models, containing water-cooled magnet coils, were investigated. The models were made of a material with low thermal conductivity, in order to visualize surface-temperature distribution. The latter has been measured by infrared thermography. Heat-flux rates have been derived from measured front and rear surface temperature taking into account temperature-dependent material characteristics and considering radiative-cooling exchange to the environment. Flow-field properties have been quantitatively characterized by laser induced fluorescence, microwave interferometry, diode laser absorption spectroscopy, electrostatic probes and Pitot probes. Remarkable measured surface-temperature reductions up to 44%, and derived heat-flux mitigation up to 85%, have been observed in the presence of an externally applied magnetic-induction field. The influence of change in the polarity of the electromagnetic coils has also been measured and showed in contrast to some former studies comparable effects for both polarities.

Document Type:Conference or Workshop Item (Speech)
Title:An Experimental Study on Heat-Flux Reduction by Electromagnetic Fields in Ionized Flows
Authors:
AuthorsInstitution or Email of Authors
Gülhan, AliDLR
Esser, BurkardDLR
Koch, UweDLR
Siebe, FrankDLR
Riehmer, JohannesDLR
Giordano, DomenicoESA
Konigorski, DetlevEADS Astrium
Date:2009
Journal or Publication Title:Proceedings of CEAS 2009 European Air and Space Conference
Status:Published
Keywords:Experimental study, Heat-flux reduction, Electromagnetic fields, Ionized flows, Arc heated facility L2K
Event Title:CEAS 2009 European Air and Space Conference
Event Location:Manchester, England
Event Type:international Conference
Event Dates:26.-29. Oktober 2009
Organizer:CEAS
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Zukünftige Raumtransporter - Entwurf und Simulationsmethoden für Raumtransporter (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: Christine Adams
Deposited On:25 Jan 2010 15:48
Last Modified:07 Nov 2012 11:11

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