A Hybrid Technique for Laser Flare Reduction
- Resource Type
- Authors
- Dongyun Shin; Daniel R. Cadel; K. Todd Lowe
- Source
- Scopus-Elsevier
- Subject
- 020301 aerospace & aeronautics
Materials science
Turbine blade
business.industry
02 engineering and technology
Velocimetry
Laser
01 natural sciences
law.invention
010309 optics
Surface coating
Optics
0203 mechanical engineering
Particle image velocimetry
law
0103 physical sciences
Trailing edge
business
Wind tunnel
Flare
- Language
A hybrid approach to near-wall measurements with laser-based velocimetry techniques utilizing light transmission and fluorescence is presented. This method aims to minimize the effect of contamination by laser flare light, and has application to facilities where optimal configurations are not achievable. The basis of the approach is to replace the solid surface near which measurements are desired with a transparent solid material treated with a fluorescent surface coating. Further discussion is provided on the optimal placement of cameras. Measurements are made of the flow field around the trailing edge of a model DU96-W-180 wind turbine blade in a 0.7 m square cross-section Open Jet Wind Tunnel using Particle Image Velocimetry in a configuration optimized for minimum flare. For the wind turbine blade model, measurements were obtained 0.4 mm from the surface using the comprehensive approach. Benchtop measurements representative of a non-optimal configuration are made to demonstrate a more practical application of the transparent material / fluorescent treatment technique.