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Micro-PIV and ELDV wind tunnel investigations of the laminar separation bubble above a helicopter blade tip
Raffel, Markus and Favier, D. and Berton, E. and Rondot, C. and Nsimba, M. and Geissler, Wolfgang (2005) Micro-PIV and ELDV wind tunnel investigations of the laminar separation bubble above a helicopter blade tip. Measurement, Science and Technology, pp. 1-13. Institute of Physics Publishing.
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Abstract
Studies of the boundary layer profile and of the characteristics of the flow velocity distribution close to the leading edge of a helicopter blade profile were conducted using the embedded laser doppler velocimetry (ELDV) and stereo-PIV. The relatively small scales of flow structures leading to dynamic stall, motivated an additional 2C-PIV study in which the flow field has been measured with a relatively high spatial resolution. The feasibility of PIV measurements utilizing a mirror telescope in a wind tunnel has been demonstrated successfully. The spatial resolution of approximately 50 μm allowed a judgment on the choice of turbulence models and damping coefficients for the improvement of CFD predictions.
| Document Type: | Article | ||||||||||||||
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| Title: | Micro-PIV and ELDV wind tunnel investigations of the laminar separation bubble above a helicopter blade tip | ||||||||||||||
| Authors: |
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| Date: | 2005 | ||||||||||||||
| Journal or Publication Title: | Measurement, Science and Technology | ||||||||||||||
| Refereed publication: | Yes | ||||||||||||||
| In ISI Web of Science: | Yes | ||||||||||||||
| Page Range: | pp. 1-13 | ||||||||||||||
| Publisher: | Institute of Physics Publishing | ||||||||||||||
| Status: | Accepted | ||||||||||||||
| Keywords: | micro-PIV, ELDV, dynamic stall, separation bubble, blade tip | ||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||
| HGF - Program: | Aeronautics | ||||||||||||||
| HGF - Program Themes: | L RR - Rotorcraft Research | ||||||||||||||
| DLR - Research area: | Aeronautics | ||||||||||||||
| DLR - Program: | L RR - Rotorcraft Research | ||||||||||||||
| DLR - Research theme (Project): | L - The Virtual Aerodynamic Rotorcraft | ||||||||||||||
| Location: | Göttingen | ||||||||||||||
| Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Helicopters Institute of Aerodynamics and Flow Technology > High Speed Configurations | ||||||||||||||
| Deposited By: | Elisabeth Winkels | ||||||||||||||
| Deposited On: | 25 Jan 2006 | ||||||||||||||
| Last Modified: | 14 Jan 2010 20:48 |
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