Numerical Study and Experimental Validation of the Interaction of Multiple Synthetic Jet Actuators with Cross Flow
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abstract
Incompressible Unsteady Navier-Stokes equations are solved to study and analyze the behavior of single and multiple synthetic jet actuators in quiescent and cross-flow conditions. The effect of two different boundary conditions, a flat plate and a backwards facing step, are also studied. Combinations of operation and non-dimensional parameters are simulated in order to investigate jet-cross flow performance for different operational regimes. The behavior of one, two and three jets in cross-flows is characterized based on the Velocity Ratio (R) and the Momentum Coefficient (C ). The influence of operation parameters and geometric parameters is also studied with particular emphasis on actuator spacing (s) and relative phase angle (). An array of three actuators is simulated under quiescent conditions for two different relative phase angles in symmetric configurations. CFD results predict change in momentum flux concentrations for specific array operating conditions. The results also show that the development and nature of the recirculation zone can be characterized for specific ranges of R and C . Three commercially available actuators have been characterized for experimental validation of the CFD predictions of flows over plates and a backward facing step. PIV tests are performed in cross-flow as well as quiescent conditions for validation of specific CFD cases. The goal of this study is to contribute to understanding the behavior of an array of synthetic jets as function of non-dimensional, geometric and operating parameters. 2012 by the American Institute of Aeronautics and Astronautics, Inc.
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50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
