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Development of an optical multi-purpose sensor using filtered scattered light

Stockhausen, Guido and Enns, Andreas and Doll, Ulrich and Beversdorff, Manfred and Willert, Christian (2014) Development of an optical multi-purpose sensor using filtered scattered light. 17th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 7.-10.July 2014, Lissabon, Portugal.

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Official URL: http://Itces.dem.ist.utl.pt/lxlaser/lxlaser2014/index.asp

Abstract

We present the development of an optical sensor head which consists of a confocal backscatter arrangement of lenses and light guiding fibers. Using a molecular absorption cell which contains iodine vapor different scatter techniques are employed to obtain multiple flow field parameters in different media like gas and liquids. For velocity measurements filtered Mie scattering is used and validation experiments with a free jet yield an absolute error of 2m/s. In gaseous flows the sensor applies filtered Rayleigh scattering to determine temperature values with an accuracy of +/-3K and pressure values which show a systematic deviation of -2% from reference measurements. Finally filtered Brillouin scattering is introduced for measuring the temperature in liquids like tap water. This technique agrees within 1K when compared to a conventional thermo element measurement.

Item URL in elib:https://elib.dlr.de/89821/
Document Type:Conference or Workshop Item (Speech)
Title:Development of an optical multi-purpose sensor using filtered scattered light
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Stockhausen, Guidoguido.stockhausen (at) dlr.deUNSPECIFIED
Enns, AndreasUNSPECIFIEDUNSPECIFIED
Doll, Ulrichulrich.doll (at) dlr.deUNSPECIFIED
Beversdorff, Manfredmanfred.beversdorff (at) dlr.deUNSPECIFIED
Willert, Christianchris.willert (at) dlr.deUNSPECIFIED
Date:7 July 2014
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Filtered Rayleigh, Brillouin, Mie scattering, temperature, pressure, velocity measurement
Event Title:17th International Symposium on Applications of Laser Techniques to Fluid Mechanics
Event Location:Lissabon, Portugal
Event Type:international Conference
Event Dates:7.-10.July 2014
Organizer:International Center for Innovation, Technology and Policy Research
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: Stockhausen, Dr.rer.nat. Guido
Deposited On:28 Jul 2014 09:28
Last Modified:31 Jul 2019 19:47

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