Abstract
This article experimentally investigates the self-excited impinging planar jet flow, specifically the development and propagation of large-scale coherent flow structures convecting between the nozzle lip and the downstream impingement surface. The investigation uses phase-locked particle image velocimetry measurements and a new structure-tracking scheme to measure convection velocity and characterize the impingement mechanism near the plate, in order to develop a new feedback model that can be used to predict the oscillation frequency as a function of flow velocity (\(U_o\)), impingement distance (\(x_o\)) and nozzle thickness (\(h\)). The resulting model prediction shows a good agreement with experimental tone frequency data.
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The authors would like to gratefully acknowledge the support of NSERC Canada.
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Arthurs, D., Ziada, S. Development of a feedback model for the high-speed impinging planar jet. Exp Fluids 55, 1723 (2014). https://doi.org/10.1007/s00348-014-1723-7
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DOI: https://doi.org/10.1007/s00348-014-1723-7