Investigation of the Dust-Air Flow Near a Vertical Rotating Cylindrical Local Exhaust

Abstract

We seek constructive solutions aimed at the improvement of the efficiency of dust capture for an open-type local exhaust and at decreasing the dust losses into an aspiration network by a closed-type local exhaust (shelter) caused by the use of a vertical rotating cylindrical exhaust. We study exhausts in the form of slit-type gaps along the generator of the cylinder and exhausts with drains from the end of the cylinder. We proposed improvements that enable one to increase the efficiency of entrainment of the air flow by rotating cylinders. The accumulated results can be useful for the design of aspiration hoods with a function of dust-collecting chamber.