Measuring velocity fields in wind tunnels with holographic interferometry
| العنوان: | Measuring velocity fields in wind tunnels with holographic interferometry |
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| المؤلفون: | N. Andrés, M. P. Arroyo, Manuel Quintanilla, K. Hinsch, H. Hinrichs |
| المصدر: | Experiments in Fluids. 30:117-122 |
| بيانات النشر: | Springer Science and Business Media LLC, 2001. |
| سنة النشر: | 2001 |
| مصطلحات موضوعية: | Fluid Flow and Transfer Processes, Physics, business.industry, Plane (geometry), Computational Mechanics, Holography, Physics::Optics, General Physics and Astronomy, Vortex shedding, Holographic interferometry, Kármán vortex street, law.invention, Physics::Fluid Dynamics, Optics, Mechanics of Materials, law, Reference beam, Cylinder, business, Wind tunnel |
| الوصف: | This paper investigates the feasibility of using holographic interferometry in wind tunnel flows for measuring velocity fields rather than density or temperature fields. First results were obtained in a vortex street behind a cylinder at Re=190(U ∞=0.7 m/s). The light scattered from an illuminated fluid plane was holographically recorded twice with the same reference beam. Using a time interval of 10 μs, local fluid displacements smaller than a few microns were recorded. The holographic plate was placed in front and as close as possible to the fluid plane. The interferograms obtained from the hologram reconstruction give information about one velocity component, at 45° with the illuminated plane. The alignment of the cylinder axis with this 45° direction provided definite confirmation about the vortex street having a non-negligible axial velocity. The constant velocity fluid region has proven to be very useful for quantifying the velocity information contained in the interferogram. |
| تدمد: | 1432-1114 0723-4864 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::46c30c0154e59963dc076db7a5872af6 https://doi.org/10.1007/s003480000146 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........46c30c0154e59963dc076db7a5872af6 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 14321114 07234864 |
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