The effect of an inlet guide plate and inlet clean air on particle separation performance was examined by experiment and numerical simulation. It is found that the 50％ cut size shows a minimum value with an inlet width ratio of 0.4 under the same pressure drop condition. The increase of cyclone pressure drop by the inlet guide plate decreases by use of a new inlet air inflow method as proposed in this research. By use of the inlet guide plate and inlet air inflow method, the optimum value of the corrected inlet width ratio is determined.
Further, from the particle trajectory simulation, particles entering into the cyclone with inlet air inflow tend to move to the circular wall region due to the strong centrifugal effect of the fluid flow. Particle collection efficiency of the cyclone using the inlet guide plate and inlet air inflow method is greater than that of the standard cyclone and the experimental results agree with the simulation results.
