Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : June 29, 2016 - July 01, 2016
In the present paper the attention is focused on the relationship between velocity fluctuation in the near-wake of rotor blade and aerodynamic noise at the design operating condition of axial flow fan. We measured the relative velocity, turbulence intensity, spectrum of velocity fluctuation and time variation of velocity fluctuation near the trailing edge. The weak periodic Karman vortex was formed in the near-wake of the trailing edge of rotor blade. The prediction formula of SPL depended on the spanwise correlation length and turbulent intensity of weak vortex shedding. We discussed these parameters to predict SPL of aerodynamic noise generated from axial flow fan.
