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Methods to improve pressure, temperature and velocity accuracies of filtered Rayleigh scattering measurements in gaseous flows

Doll, Ulrich and Burow, Eike and Stockhausen, Guido and Willert, Christian (2016) Methods to improve pressure, temperature and velocity accuracies of filtered Rayleigh scattering measurements in gaseous flows. Measurement Science & Technology, 27 (12), p. 125204. Institute of Physics (IOP) Publishing. DOI: 10.1088/0957-0233/27/12/125204 ISSN 0957-0233

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Official URL: http://stacks.iop.org/0957-0233/27/i=12/a=125204

Abstract

Frequency scanning filtered Rayleigh scattering is able to simultaneously provide time-averaged measurements of pressure, temperature and velocity in gaseous flows. By extending the underlying mathematical model, a robust alternative to existing approaches is introduced. Present and proposed model functions are then characterized during a detailed uncertainty analysis. Deviations between the analytical solution of a jet flow experiment and measured results could be related to laser-induced background radiation as well as the Rayleigh scattering’s spectral distribution. In applying a background correction method and by replacing the standard lineshape model by an empirical formulation, detrimental effects on pressure, temperature and velocity accuracies could be reduced below 15 hPa, 2.5 K and 2.7 m/s.

Item URL in elib:https://elib.dlr.de/107331/
Document Type:Article
Title:Methods to improve pressure, temperature and velocity accuracies of filtered Rayleigh scattering measurements in gaseous flows
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Doll, Ulrichulrich.doll (at) dlr.deUNSPECIFIED
Burow, Eikeeike.burow (at) dlr.deUNSPECIFIED
Stockhausen, Guidoguido.stockhausen (at) dlr.deUNSPECIFIED
Willert, Christianchris.willert (at) dlr.deUNSPECIFIED
Date:2 November 2016
Journal or Publication Title:Measurement Science & Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:27
DOI :10.1088/0957-0233/27/12/125204
Page Range:p. 125204
Publisher:Institute of Physics (IOP) Publishing
ISSN:0957-0233
Status:Published
Keywords:Rayleigh scattering, molecular filter, pressure, temperature, velocity, simultaneous measurement, laser-optical, uncertainties, background correction, analytical lineshape model, gaseous flow, jet experiment
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation methods
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Doll, Ulrich
Deposited On:04 Jan 2017 11:40
Last Modified:06 Sep 2019 15:21

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