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μ-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 Maresca, C. and Rondot, C. and Nsimba, M. and Geissler, Wolfgang (2005) μ-PIV and ELDV wind tunnel investigations of the laminar separation bubble above a helicopter blade tip. 6th International Symposium on Particle Image Velocimetry, 2005-11-21 - 2005-11-23, Pasadena, CA (USA).
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Abstract
Detailed studies of the boundary layer profile and 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 related 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: | Conference or Workshop Item (Speech, Paper) | ||||||||||||||||
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| Title: | μ-PIV and ELDV wind tunnel investigations of the laminar separation bubble above a helicopter blade tip | ||||||||||||||||
| Authors: |
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| Date: | 2005 | ||||||||||||||||
| Refereed publication: | No | ||||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||||
| Status: | Published | ||||||||||||||||
| Keywords: | micro-PIV, ELDV, dynamic stall, separation bubble, blade tip | ||||||||||||||||
| Event Title: | 6th International Symposium on Particle Image Velocimetry | ||||||||||||||||
| Event Location: | Pasadena, CA (USA) | ||||||||||||||||
| Event Type: | international Conference | ||||||||||||||||
| Event Dates: | 2005-11-21 - 2005-11-23 | ||||||||||||||||
| 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: | 24 Jan 2006 | ||||||||||||||||
| Last Modified: | 06 May 2013 11:36 |
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