Measurements of the orthogonal blade-vortex interaction using a particle image velocimetry technique
| Autor: | R. M. Cannon, Con J. Doolan, Richard Green |
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| Rok vydání: | 2000 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics business.industry Computational Mechanics General Physics and Astronomy Mechanics Aerodynamics Vorticity Velocimetry law.invention Vortex Physics::Fluid Dynamics Optics Flow (mathematics) Particle image velocimetry Mechanics of Materials law Condensed Matter::Superconductivity Helicopter rotor Dispersion (water waves) business |
| Zdroj: | Experiments in Fluids. 29:369-379 |
| ISSN: | 1432-1114 0723-4864 |
| DOI: | 10.1007/s003489900096 |
| Popis: | This paper describes the results of application of a particle image velocimetry (PIV) technique to an orthogonal blade–vortex interaction experiment. To help resolve the problem of vortex meander during the tests, two PIV systems were used, which produced two velocity vector maps closely separated in time. During the PIV analysis an image-based vector validation scheme was used, which was shown to reduce significantly the number of wild vectors reaching the vector map. Preliminary results from the tests showed that, close to the blade, a significant radial outflow was superimposed on the vortex flow field. The radial flow is thought to be due to the dispersion of the vortex axial core flow during vortex cutting, which distorts the vortex flow field and enlarges the vortex. Further away from the blade, no significant radial flow was detected and the vortex remained undisturbed. |
| Databáze: | OpenAIRE |
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