The flow characteristics of coupled oscillatory motion of M j = 1.5 supersonic twin jets are described using the particle image velocimetry measurements. As a result of self-excitation caused by screech, sinuous oscillation of individual jets is observed. The coupling between the jets, characterized by the presence of coherent large-scale eddies, results in a symmetric mode with respect to the midplane separating the two jets. A control technique using microjets placed at the nozzle exit is used to suppress the unsteady flow
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Alkislar et al. (2005) studied this question.
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