Wiegel, M. and Fischer, M. (1995) Utilizing a Laser Light Sheet Technique in a Boundary-Layer Flow to Study Different Transition Types. In: 7th International Symposium on Flow Visualization, pp. 432-437. 7th International Symposium on Flow Visualization, Seattle, Washington, USA, Sept. 11-14, 1995.
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A non-intrusive flow visualization technique for investigations in a boundary layer in air utilizing a laser-light sheet technique with adequate seeding is presented. The non-intrusive homogeneous seeding of the flow was realized by feeding the tracer particles into the flow with a seeding-rake located upstream of the grid and screens of the wind tunnel. We could also present a sophisticated excitation device which provided reproducible and constant initial conditions of the boundary-layer instabilities. Selecting different combinationsof the excitation signals, it was possible to investigate besides thefundamental and subharmonic transition the development of a single oblique wave and the oblique transition. This excitation together with the stated visualization technique enabled us to investigate effectively different transition types. Another important feature of this set-up is the phase-locked recording against the excitation signal facilitating the recording at a chosen phase with respect.
|Document Type:||Conference or Workshop Item (Paper)|
|Title:||Utilizing a Laser Light Sheet Technique in a Boundary-Layer Flow to Study Different Transition Types|
|Journal or Publication Title:||7th International Symposium on Flow Visualization|
|Page Range:||pp. 432-437|
|Keywords:||Non-Intrusive Flow Visualization, Laser Light Sheet, Boundary-Layer Flow|
|Event Title:||7th International Symposium on Flow Visualization, Seattle, Washington, USA, Sept. 11-14, 1995|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||other|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L TG - Querschnittstechnologien|
|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 10:08|
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