elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

LIF Measurement of Rotational Temperatures Near a Hot Surface. Part I: Cu-Disk in a Hypersonic Free Jet

Gundlach, G. and Dankert, C. and Hefer, G. and Lehmköster, K. (1993) LIF Measurement of Rotational Temperatures Near a Hot Surface. Part I: Cu-Disk in a Hypersonic Free Jet. DLR-Interner Bericht. 222 - 93 A 27, 25 S.

Full text not available from this repository.

Abstract

A method for the measurement of temperatures and densities in rarefied flow is the Laser Induced Fluorescence (LIF) spectroscopy which is applied to reentry simulation of Hermes, Saenger, and the Shuttle in wind tunnels. The strong nonequilibrium of rotational and vibrational temperature is typical of hypersonic wind tunnels becauseof the rapid expansion in Laval nozzle or free jets. LIF excitation spectra of nitric oxide (NO) were measured in a hot hypersonic free jet expansion in the vacuum wind tunnel at DLR Goettingen in a wide density range (10 up 11 - 10 up 16 molecules/cm3). To interpret the experimental results, a computer program was developed that calculates excitation spectra. By means of LIF measurements in the free flow and in front of a model surface details of the heat transfer can be examined. This is relevant for the gas-surface interaction of reentry vehicles.

Document Type:Monograph (DLR-Interner Bericht)
Additional Information: LIDO-Berichtsjahr=1993,
Title:LIF Measurement of Rotational Temperatures Near a Hot Surface. Part I: Cu-Disk in a Hypersonic Free Jet
Authors:
AuthorsInstitution or Email of Authors
Gundlach, G.UNSPECIFIED
Dankert, C.UNSPECIFIED
Hefer, G.UNSPECIFIED
Lehmköster, K.UNSPECIFIED
Date:1993
Journal or Publication Title:Auftragsbericht, Auftraggeber: DASSAULT Aviation, Velizy/France Auftragsnr. HERMES R/Q 2731101N, 08T 00052, DPH No.7373/92 - Rider 2
Number of Pages:25
Status:Published
Keywords:Laser induced fluorescence, Gas-surface interaction, Non-equilibrium flows, Free jet expansion, Hypersonic flow, Temperature measurement
HGF - Research field:UNSPECIFIED
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:UNSPECIFIED
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik > Institut für Experimentelle Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:07

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.