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Characterisation of Argon flows in the arc heated facility L2K using Diode Laser Absorption spectroscopy and additional optical diagnostics

Koch, Uwe and Steffens, Lars and Esser, Burkard and Gülhan, Ali and Shibusawa, Kenji (2014) Characterisation of Argon flows in the arc heated facility L2K using Diode Laser Absorption spectroscopy and additional optical diagnostics. 6th International Workshop on Radiation of High Temperature Gases, 24. - 27. Nov. 2014, St. Andrews, Great Britain.

Full text not available from this repository.

Official URL: http://www-solar.mcs.st-and.ac.uk/~rhtg6/files/RadiationWS_6-St_Andrews_2ndannouncement_final.pdf

Abstract

Argon flows in the arc heated facility were studied with the aim to reduce thermal loads of reentry vehicles using MHD effects and to study a new mitigation scheme for re-entry blackout via numerical and experimental methods in order to demonstrate the possibilities to solve the radio blackout problem using a MHD effect. Argon flows are used because compared to air flows relative high electron and ion densities can be realized in ground based facilities with long constant flow duration. In addition the small number of chemical reactions in high enthalpy Argon flows simplifies the numerical simulation of MHD effects. Different optical diagnostic techniques are used to study the physical properties of Argon flows. Diode Laser Absorption Spectroscopy, Laser Induced Fluorescence spectroscopy, Optical Emission Spectroscopy, Fourier Transform Infrared Radiation emission spectroscopy and MicroWave Interferometry were applied to Argon flows in the L2K facility. The electron density, the number of ions and neutrals, the velocity and temperature were measured in the free stream and in vicinity of a cylindrical model placed in the flow. The advantages and disadvantages and the results from the different measurement techniques are discussed and are compared.

Item URL in elib:https://elib.dlr.de/94758/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Conference Proceedings erscheinen als Tagungsband
Title:Characterisation of Argon flows in the arc heated facility L2K using Diode Laser Absorption spectroscopy and additional optical diagnostics
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Koch, UweUwe.Koch (at) dlr.deUNSPECIFIED
Steffens, LarsLars.Steffens (at) dlr.deUNSPECIFIED
Esser, BurkardBurkard.Esser (at) dlr.deUNSPECIFIED
Gülhan, AliAli.Guelhan (at) dlr.deUNSPECIFIED
Shibusawa, KenjiIbaraki National College of TechnologyUNSPECIFIED
Date:2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-10
Series Name:Conference Proceedings
Status:Published
Keywords:High Enthalpie flow, arc heater, Argon, Diode laser Absorption spectroscopy,
Event Title:6th International Workshop on Radiation of High Temperature Gases
Event Location:St. Andrews, Great Britain
Event Type:Workshop
Event Dates:24. - 27. Nov. 2014
Organizer:ESA
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 - Proj. Thermas (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Über- und Hyperschalltechnologien
Deposited By: Koch, Uwe
Deposited On:19 Jan 2015 16:50
Last Modified:19 Aug 2015 10:59

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