Abstract
The mechanisms and scaling laws for noise radiated from interacting subsonic air jets have been studied experimentally. Simultaneous measurements were conducted of the velocity field and radiated pressure associated with interacting jets formed downstream of sharp‐edged, multiholed orifice plates. The orifice plates, containing from 1 to 31 holes, were placed at the termination of a quiet 76 mm I.D. pipe air‐flow facility. The characteristics of the broadband and tonal components of the radiated noise field are evaluated in terms of: (i) the orifice plate hole geometries and flow interactions, and (ii) the downstream jet features.
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