21.1.4 LEITH AND LICHT EFFICIENCY MODEL
Other models have been developed to predict cyclone performance. One is the Leith
and Licht model2 shown in Equation 21.9
The geometric configuration parameter is estimated based on the cyclone con-
figuration. Table 21.2 shows relative dimensions for three types of cyclones: the
standard cyclone, the Stairmand design,3 and the Swift design.4 Note that the Stairmand
and the Swift cyclones have smaller inlet openings than the standard design,
which means a higher inlet velocity for the same size body. This results in more
centrifugal force and increased efficiency. In the Leith and Licht model, a larger
geometric configuration parameter results in a higher predicted efficiency.