Small axial fans, commonly employed for cooling electronic equipment, are frequently
housed within narrow ducts, where intense tonal sound with duct resonance can occur …

Expanding pipes with orifice plates are often utilized as silencers for fluid machinery.
However, intense tonal sounds can be generated from a flow through such expanding pipes …

In this study, not only the flow field but the aerodynamic sound field around the axial flow fan
were directly simulated using the lattice Boltzmann method (LBM). To validate the LBM …

Broadband noise due to the turbulence-aerofoil interaction, which is also called the leading
edge noise, is one of the major noise sources of aircraft (including the engine). To study the …

The aerodynamic noise from fan motors is main noise source of domestic electric appliances
and office automation equipment. Reduction of the fan motor noise emission is important to …

In recent years, to predict the performance and the aerodynamic sound of box fans with high
accuracy, numerical analysis has been necessary for the transitional boundary layer on the …

This paper presents an efficient sliding mesh method to simulate the noise emission from
aero-engines. The vortexes shed from the rotating blade and interact with the downstream …

抄録 For a small axial fan in a duct, the effects of acoustic resonance occurring in the duct on
the flow around the fan are focused on. To clarify the condition for the intense acoustic …

抄録 For a small axial-flow fan installed in a duct, the effects of the acoustic resonance
occurring in the duct on the flow field and aerodynamic characteristic were investigated. The …

抄録 For an axial-flow fan installed in a duct, the effects of casing slit shapes on pressure
rise, aerodynamic sound and flow field were investigated. By a tuft method, an inflow …