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Experimental Verification of Heat-Flux Mitigation by Electromagnetic Fields in Partially-Ionized-Argon Flows

Gülhan, Ali and Esser, Burkard and Koch, Uwe and Siebe, Frank and Riehmer, Johannes and Giordano, Domenico and Konigorski, Detlev (2009) Experimental Verification of Heat-Flux Mitigation by Electromagnetic Fields in Partially-Ionized-Argon Flows. Journal of Spacecraft and Rockets, 46 (2), pp. 274-283. ISSN 0022-4650.

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Abstract

This paper describes an experimental study 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 have been investigated. The models have been made of a material with low thermal conductivity 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 temperatures, taking into account temperature-dependent material characteristics and considering radiative-cooling exchange to the environment. Flowfield properties have been quantitatively characterized by laser-induced fluorescence, microwave interferometry, emission spectroscopy, electrostatic probes, and pitot probes. In addition, high-quality video recordings and photographs have been taken for shock-layer visualization. Remarkable measured surface-temperature reductions (16 and 44%) and derived heat-flux mitigations (46 and 85%) have been observed in the presence of an externally applied magnetic-induction field.

Document Type:Article
Title:Experimental Verification of Heat-Flux Mitigation by Electromagnetic Fields in Partially-Ionized-Argon Flows
Authors:
AuthorsInstitution or Email of Authors
Gülhan, AliAli.Guelhan@dlr.de
Esser, BurkardBurkard.Esser@dlr.de
Koch, UweUwe.Koch@dlr.de
Siebe, FrankFrank.Siebe@dlr.de
Riehmer, JohannesUNSPECIFIED
Giordano, DomenicoUNSPECIFIED
Konigorski, DetlevUNSPECIFIED
Date:March 2009
Journal or Publication Title:Journal of Spacecraft and Rockets
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:46
Page Range:pp. 274-283
ISSN:0022-4650
Status:Published
Keywords:Ionized flows, heat flux mitigation, electro dynamic effects, arc heated facility L2K
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 - Grundlagen Raumtransport - Anlagen und Messtechnik (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Christine Adams
Deposited On:06 Oct 2008
Last Modified:07 Feb 2013 20:35

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