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On Acoustic Efficiency of Supersonic Annular Jets,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Pagination or Media Count:
Acoustic emission of a supersonic annular jet takes place both into the space surrounding the jet and into the inner area, which is formed by a central nozzle body with an annular critical cross section. The level of emission into the outside sonic space probably does not differ in any way from the level of acoustic emission of a single supersonic cylindrical jet. Hence, the total power of an acoustic emission will be equal to the acoustic emissions of the annular jet into an outside space and toward the bottom edge of the central body.
APPROVED FOR PUBLIC RELEASE