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Laser Induced Fluorescence and Diode Laser Absorption Spectroscopy Measurements in CO/CO2 Hypersonic Flow of LBK

Koch, Uwe and Riehmer, Johannes and Esser, Burkard and Gülhan, Ali (2008) Laser Induced Fluorescence and Diode Laser Absorption Spectroscopy Measurements in CO/CO2 Hypersonic Flow of LBK. In: Proceedings of the 6th European Symposium on Aerothermodynamics for Space Vehicles, SP-659. 6th European Symposium on Aerothermodynamics for Space Vehicles, 2008-11-03 - 2008-11-06, Versailles, Frankreich.

Full text not available from this repository.

Abstract

In the frame of the ESA TRP study ‘CFD Validation in CO2 Environment’ aerothermodynamic tests were performed in DLR’s arc heated facility L2K in Cologne using two different cylindrical models with diameters of 50 and 100 mm. For the correct simulation of the Martian atmosphere a gas mixture of 97% carbon dioxide and 3% nitrogen was used. Tests were carried out at two flow conditions characterized by enthalpy levels of 13.1 and 8.3 MJ/kg. The flow field was characterized by Pitot pressure profile and cold wall heat flux measurements. In addition to emission measurements laser-induced fluorescence (LIF) of nitrous oxide and carbon monoxide was applied, in order to get space-resolved rotational temperatures and partial densities in free stream regions and the shock layer in front of the models. Diode laser absorption spectroscopy (DLAS) was used to deduce the translational temperature, the velocity and the density of carbon monoxide in free stream flow. Velocities are measured with good accuracy, while the translational temperature measurements tend to be too high. Online velocity determinations with a repetition rate of 10 Hz were performed and resulted in free stream velocities.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Laser Induced Fluorescence and Diode Laser Absorption Spectroscopy Measurements in CO/CO2 Hypersonic Flow of LBK
Authors:
AuthorsInstitution or Email of Authors
Koch, UweUNSPECIFIED
Riehmer, JohannesRWTH Aachen
Esser, BurkardUNSPECIFIED
Gülhan, AliUNSPECIFIED
Date:6 November 2008
Journal or Publication Title:Proceedings of the 6th European Symposium on Aerothermodynamics for Space Vehicles
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Volume:SP-659
Editors:
EditorsEmail
ESA Publication Division, UNSPECIFIED
Status:Accepted
Keywords:High enthalpy flow, Laser induced fluorescence, Diode laser absorption spectroscopy, Hypersonics
Event Title:6th European Symposium on Aerothermodynamics for Space Vehicles
Event Location:Versailles, Frankreich
Event Type:international Conference
Event Dates:2008-11-03 - 2008-11-06
Organizer:ESA
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:12 Jan 2009
Last Modified:27 Apr 2009 15:42

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