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A planar Mie scattering visualization technique for turbo machinery application

Gawehn, Thomas and Schodl, Richard (2007) A planar Mie scattering visualization technique for turbo machinery application. Measurement Science and Technology, 18 (12), pp. 3688-3696. Institut of Physics (IOP) Publishing. DOI: 10.1088/0957-0233/18/12/003

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Official URL: http://www.iop.org/EJ/abstract/0957-0233/18/12/003


A planar Mie scattering technique is described which allows for the systematical analysis of three-dimensional shock configurations without the need for velocity measurements. For that, small particles are added to the flow upstream of the shock and illuminated by a laser light sheet. The scattered light is captured by a CCD camera so that the position of the shock wave can be determined from the increase of the light intensity across the shock. To analyze the three-dimensional structure of a shock wave, the light sheet is moved perpendicular to the flow direction. The measurement technique is applied to both a supersonic wedge flow at Ma = 2.43 and a more complex shock wave configuration in a transonic cascade flow at Ma = 1.09. The gathered results are conclusive with Schlieren photographs, numerical simulations and surface pressure measurements. As the chosen setup allows the application to test sections with restricted optical access and a synchronization of the image capturing process with an external triggering signal, the three-dimensional shock configurations inside a transonic compressor rotor can also be visualized.

Item URL in elib:https://elib.dlr.de/52404/
Document Type:Article
Title:A planar Mie scattering visualization technique for turbo machinery application
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Date:September 2007
Journal or Publication Title:Measurement Science and Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1088/0957-0233/18/12/003
Page Range:pp. 3688-3696
Publisher:Institut of Physics (IOP) Publishing
Keywords:shock wave, transonic flow, laser light sheet, wind tunnel, transonic compressor rotor, TXV, tracer based shock visualization, vapor screen technique
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Institute of Propulsion Technology
Deposited By: Gawehn, Dr.-Ing. Thomas
Deposited On:20 Dec 2007
Last Modified:27 Apr 2009 14:35

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