• The KSFM Journal of Fluid Machinery
• /
• v.1 no.1 s.1
• /
• pp.49-57
• /
• 1998

The acoustic signatures from a propeller fan under non-uniform inlet flow conditions were measured to reveal the mechanism for tonal radiation. Experimental studies were carried out by generating non-uniform turbulent flows with circumferential and radial components of harmonic incoming gust deliberately. This paper reports the measured acoustic power exponents and cross-spectra for circumferential and radial disturbances at a specified flow-rate coefficient.