Experimental characterization of the initial zone of an annular jet with a very large diameter ratio

This article presents an experimental investigation of a large diameter ratio annular air jet by particle image velocimetry, Laser Doppler Anemometry, hot-wire anemometry and time-resolved tomography. Annular jets consist of a round nozzle with an obstacle placed in its center. These jets are thus d...

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Bibliographic Details
Published in:Experiments in fluids 2013, Vol.54 (1), p.1-17, Article 1418
Main Authors: Danlos, Amélie, Lalizel, Gildas, Patte-Rouland, Béatrice
Format: Article
Language:English
Subjects:
Anemometry
Annular
Doppler effect
Engineering
Engineering Fluid Dynamics
Engineering Sciences
Engineering Thermodynamics
Exact sciences and technology
Fluid dynamics
Fluid mechanics
Fluid- and Aerodynamics
Fluids mechanics
Fundamental areas of phenomenology (including applications)
Heat and Mass Transfer
Instrumentation for fluid dynamics
Jets
Lasers
Mechanics
Nozzles
Obstacles
Physics
Research Article
Turbulent flows, convection, and heat transfer
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Summary:This article presents an experimental investigation of a large diameter ratio annular air jet by particle image velocimetry, Laser Doppler Anemometry, hot-wire anemometry and time-resolved tomography. Annular jets consist of a round nozzle with an obstacle placed in its center. These jets are thus defined by an external and an internal diameter corresponding to the round nozzle lips and the diameter of the obstacle, respectively. The ratio between these two diameters defines the behavior of the flow across a characteristic diameter called diameter ratio. In most industrial applications these jets have large diameter ratios, superior to 0.7.
ISSN:0723-4864
1432-1114
DOI:10.1007/s00348-012-1418-x