Abstract
A technical basis has been developed which justifies using two nondimensional parameters: the ratio of the cutpoint particle diameter to the cyclone diameter, (D 0.5 /D c ) and the flow Reynolds numbers, Ref. An improved method has also been developed for the design of single-inlet aerosol sampling cyclones using these parameters in a semiempirical functional relation. This allows predictions to be made of aerodynamic equivalent particle (AED) cutpoint diameter for a Stairmand cyclone which has had an alteration to its outlet tube diameter. The correlation coefficient for the functional relationship is r 2 >0.99. Using a particular cyclone, a designer can hold the airflow rate constant and then predict how the particle cutpoint will change as the outlet tube diameter is changed
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