Development of a feedback model for the high-speed impinging planar jet |
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Authors: | D Arthurs S Ziada |
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Institution: | 1. RWDI AIR Inc., Guelph, ON, Canada 2. McMaster University, Hamilton, ON, Canada
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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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