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.
|Title:||A planar Mie scattering visualization technique for turbo machinery application|
|Journal or Publication Title:||Measurement Science and Technology|
|In ISI Web of Science:||Yes|
|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|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L - no assignement|
|DLR - Research theme (Project):||L -- no assignement|
|Institutes and Institutions:||Institute of Aerodynamics and Flow Technology|
Institute of Propulsion Technology
|Deposited By:||Dr.-Ing. Thomas Gawehn|
|Deposited On:||20 Dec 2007|
|Last Modified:||27 Apr 2009 12:35|
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