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Contribution of Vacuum-Ultraviolet Transitions of Molecular Nitrogen to Radiative Heat Flux During Aatmospheric Reentry

Liebhart, H. and Fertig, Markus and Herdrich, Georg and Fasoulas, Stefanos and Röser, Hans-Peter (2011) Contribution of Vacuum-Ultraviolet Transitions of Molecular Nitrogen to Radiative Heat Flux During Aatmospheric Reentry. 4th International Workshop Radiation of High Temperature Gases in Atmospheric Entry, 12.-15. Okt. 2010, Lausanne, Schweiz. ISBN 978-92-9092-253-7

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Abstract

Within this work we investigate the radiative properties of molecular nitrogen with respect to the highly excited electronic states giving rise to radiative transitions occurring in the spectral range of Vacuum-Ultraviolet (VUV) radiation. This is done in order to shed light on the role of VUV radiation of molecular nitrogen in the radiative heat load encountered by a vessel during highspeed atmospheric reentry. The considered transitions bands are the Lyman – Birge – Hopfield, Birge – Hopfield I, Birge – Hopfield II, Caroll – Yoshino, Worley – Jenkins, Worley, and e'1Sigmau+ - X1Sigmag+ band. The approach to retrieve the relevant parameters for the line by line radiation simulation follows common methods of calculation, which are the reconstruction of the potential energy function via the Rydberg-Klein-Rees (RKR) method and subsequently solving the corresponding radial Schrödinger equation. Absorption and emission spectra are then calculated for a known equilibrium test condition of air plasma to illustrate the contribution of the VUV transitions to the radiation. The influence of the VUV radiation on the heat load experienced by a reentry vehicle is illustrated with an exemplary CFD calculation.

Item URL in elib:https://elib.dlr.de/95669/
Document Type:Conference or Workshop Item (Speech)
Title:Contribution of Vacuum-Ultraviolet Transitions of Molecular Nitrogen to Radiative Heat Flux During Aatmospheric Reentry
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Liebhart, H.liebhart (at) irs.uni-stuttgart.deUNSPECIFIED
Fertig, MarkusMarkus.Fertig (at) dlr.deUNSPECIFIED
Herdrich, GeorgInstitut für Raumfahrtsysteme, Universität StuttgartUNSPECIFIED
Fasoulas, StefanosIRS Universität StuttgartUNSPECIFIED
Röser, Hans-PeterInstitut für Raumfahrtsysteme, Universität StuttgartUNSPECIFIED
Date:February 2011
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:689
Series Name:ESA Special Publication
ISBN:978-92-9092-253-7
Status:Published
Keywords:VUV, Gasstrahlung, Stickstoff
Event Title:4th International Workshop Radiation of High Temperature Gases in Atmospheric Entry
Event Location:Lausanne, Schweiz
Event Type:international Conference
Event Dates:12.-15. Okt. 2010
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 - Raumfahrzeugsysteme - Numerische Verfahren und Simulation
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Fertig, Dr. Markus
Deposited On:19 Mar 2015 15:22
Last Modified:01 Dec 2018 19:51

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