Experimental study of an axial flow cyclone with ongoing dust removal from a settling tank

Abstract

The results of an experimental study are presented, the purpose of which was to evaluate the effect of geometric dimensions and flow parameters of an axial flow cyclone for different values of dust suction flux from the cyclone settler. The problem of current removal (by ejective suction) of dust from the cyclone settling tank with an additional flux is not sufficiently recognized in the field of numerical as well as experimental studies. The research conducted is novel and the results obtained are unique. It has been shown experimentally that the separation efficiency of the cyclone, in the range of inlet velocity υ₀ = 2–10 m/s, increases intensively with an increase in the degree of dust suction m₀, but only up to a certain value. The use of dust degree of suction above m₀ =10–15 % is unjustified due to a slight increase in separation efficiency, a significant increase in pressure drops. The cyclone in the basic version and several variants with changed geometric parameters were studied. The phenomenon of suction shifts the characteristics of separation efficiency φ_c = (υ₀) and pressure drop Δp_c = (υ₀) towards higher values. The introduction of dust suction from the settling tank at (m₀ =15 %) results in an increase in the separation efficiency of the cyclone in the basic version by 5 %, and by 12 % after changing the geometry of the impeller and outlet tube. The use of current dust removal from the settling tank of the multicyclone of the two-stage filter not only results in an increase in separation efficiency and accuracy, but also significantly extends the period of efficient operation of the motor vehicle engine inlet air filtration system.

The results of an experimental study are presented, the purpose of which was to evaluate the effect of geometric dimensions and flow parameters of an axial flow cyclone for different values of dust suction flux from the cyclone settler. The problem of current removal (by ejective suction) of dust from the cyclone settling tank with an additional flux is not sufficiently recognized in the field of numerical as well as experimental studies. The research conducted is novel and the results obtained are unique. It has been shown experimentally that the separation efficiency of the cyclone, in the range of inlet velocity υ₀ = 2–10 m/s, increases intensively with an increase in the degree of dust suction m₀, but only up to a certain value. The use of dust degree of suction above m₀ =10–15 % is unjustified due to a slight increase in separation efficiency, a significant increase in pressure drops. The cyclone in the basic version and several variants with changed geometric parameters were studied. The phenomenon of suction shifts the characteristics of separation efficiency φ_c = (υ₀) and pressure drop Δp_c = (υ₀) towards higher values. The introduction of dust suction from the settling tank at (m₀ =15 %) results in an increase in the separation efficiency of the cyclone in the basic version by 5 %, and by 12 % after changing the geometry of the impeller and outlet tube. The use of current dust removal from the settling tank of the multicyclone of the two-stage filter not only results in an increase in separation efficiency and accuracy, but also significantly extends the period of efficient operation of the motor vehicle engine inlet air filtration system.