Abstract:

In order to improve the separation accuracy and efficiency of the cyclone，an inflatable flat⁃

bottom cyclone was designed，and the CFD numerical simulation technology was used to explore its internal

flow field law. The results show that the pressure gradient near the outer swirl of the inflatable cyclone is

higher than that of the flat-bottom cyclone，and the tangential inflatable cyclone is more obvious. The tan⁃

gential velocity of the inflatable cyclone is higher than that of the flat-bottom cyclone beyond the radius of

10 mm，and the tangential inflatable cyclone is more obvious. In the center of the inner swirl region，the axi⁃

al velocity of the inflatable cyclone is larger，and the change of the tangential inflatable cyclone is more obvi⁃

ous. The axial velocity of the inflatable cyclone in the outer swirl region is smaller than that of the flat-bot⁃

tom cyclone. For coarse particles，the tangential inflatable cyclone has the highest classification efficiency.

For fine particles，the radial inflatable cyclone has the highest classification efficiency. The research results

can provide experience for the design and application of inflatable cyclones.

Key words:

flat-bottom cyclone, tangential inflation, radial inflation, numerical simulation, classifi?

cation performance