Goal. The problem can be solved in research by studying the effect of the ratio of the volume of gas passing through the dust unloading holes to the amount of gas passing through the tangential inlet to the hydraulic resistance and cleaning efficiency in the cyclone with intermediate removal of precipitated dust.
Goal. Stated problem in scientific article could be solved by computer modeling of gas stream motion in working area using CFD - programs. Knowledge about structure of gas stream and the trajectory of motion of dust particles afford us to evaluate the efficiency of its work and optimize the design of apparatus. Significance of work consists in evaluation of efficiency of work of cleaning apparatus using CFD - programs. Experiments that is conducted using CFD - programs considerably accelerate the process of researches and are cheaper.