Experimental study on velocity field between two adjacent blades and gas–solid separation of a turbo air classifier

The velocity field between two adjacent blades in a turbo air classifier was measured using the particle image velocimetry (PIV) technique equipped with a self-developed synchronizer. It was found that vortex swirling flow existed between the two blades or in the annular region between the impeller and the side wall. Under a given condition, the swirling intensity was higher while the swirling zone was smaller in the horizontal plane of the...