It is revealed that the main driving force of the acoustic streaming field inside the motor is stemming from .

After that, the acoustic streaming field was theoretically analyzed and the relationship between the acoustic streaming velocity and the rotating speed of the motor was set .

Based on the Lighthill aerodynamic acoustics equation,the jet sound field generated by the inner leakage of gate valve according to different opening height is numerically simulated with the difference method.

By using 2-weighted average central-difference hidden scheme,under the condition of different inner leakage clearances,the jet sound field generated by the inner leakage of ball valve is numerically simulated.

The result showed that different fore forms had an influence on pressure and hydrodynamic noise field.

The highly efficient AF2 algorithm is used to calculate three-dimensional transonic flowfields about inlets.

The time-series of the FCC particle concentrations were measured by an optical fiber probe under different superficial gas velocities,sound pressure levels and frequencies in an acoustic fluidized bed(140×1600 mm).

The radial and axial profiles of the FCC particle concentrations were measured using an optical fiber probe under different superficial gas velocities, sound pressure levels and frequencies in an acoustic fluidized bed (Φ140 mm×1600 mm).