Controlled excitation of elliptic jets

Studies of unexcited and excited elliptic jets reveal their characteristics to be noticeably different from circular jets, suggesting applications of excited elliptic jets for enhanced mixing and chemical reaction, and control of aerodynamic noise. The near-field turbulence characteristics, jet spread, and locations of switching of major and minor axes of the jet cross section can be drastically altered by forcing. The "preferred mode" and the "stable pairing mode" of an elliptic jet of a moderate aspect ratio scale with the exit equivalent diameter.