The present research examines the relationship between the large-scale structure
dynamics of a controlled jet and the far-field sound. This was achieved by exploring the
flowfield and the far field of an axisymmetric Mach 0.9 jet with a Reynolds number
based on jet diameter of approximately 7.6 x 105. The jet is controlled by eight localized
arc filament plasma actuators (LAFPA), which operate over a frequency range that spans
the jet column instability, the initial shear layer instability, and higher. Varying the phase
between the eight actuators allows excitation of azimuthal modes (m) 0, 1, 2, and 3.
dynamics of a controlled jet and the far-field sound. This was achieved by exploring the
flowfield and the far field of an axisymmetric Mach 0.9 jet with a Reynolds number
based on jet diameter of approximately 7.6 x 105. The jet is controlled by eight localized
arc filament plasma actuators (LAFPA), which operate over a frequency range that spans
the jet column instability, the initial shear layer instability, and higher. Varying the phase
between the eight actuators allows excitation of azimuthal modes (m) 0, 1, 2, and 3.
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