Characterization of a system generating a homogeneous isotropic turbulence field by free synthetic jets |
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Authors: | Charles Goepfert Jean-Louis Marié Delphine Chareyron Michel Lance |
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Institution: | 1. Laboratory of Fluid Mechanics and Acoustics UMR CNRS 5509, University of Lyon, Lyon, France 2. Ecole Centrale de Lyon, Université Lyon1, INSA Lyon, 69134, Ecully, France
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Abstract: | A facility inspired by Hwang and Eaton (2004a, b) for generating a homogeneous isotropic turbulence was built, the objective being to study evaporating droplets in the presence
of turbulence. Turbulence was produced by the mixing of six synthetic jets, in ambient atmosphere. Combined PIV and LDA techniques
were used to measure the statistical turbulence properties. The turbulence produced was found to be homogeneous isotropic
with a small mean flow within a domain having an average size of 50 mm × 50 mm × 50 mm. The rms fluctuations were of the order
of 0.9 m/s, corresponding to a Taylor Reynolds number of 240 and an integral length scale of about 40 mm. This apparatus proved
to be well suited to the study of the evaporation of droplets in a controlled turbulence field. |
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