Abstract
It is generally understood that the non-circular jets exhibit better mixing enhancement and noise suppression properties compared to circular jet. The present paper is on the experimental investigation of near acoustic field and noise source location of non-circular underexpanded jets and comparison with circular jet. Square, triangular, rectangular slot jets are considered in this work. The near field overall sound pressure level contours obtained along transverse plane and spanwise plane of non-circular jets and compared with circular jet for nozzle pressure ratio R at 4 and 5 which is analyzed to get noise source location for various jets. The effect of geometry in acoustic field in near field is highlighted in this paper.
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