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03_chap_wang.qxd 05/05/2004 12:48 pm Page 108
108 José Renato Coury et al.

Table 3
Pressure Drop in a High-Efficiency Stairmand Cyclone as a Function of the Gas
Velocity at the Entrance, v
i
∆P (Pa) v (m/s)
i
87 5.1
336 10.0
785 15.0
1407 20.0
2205 25.0
Source: ref. 17.

Solution
Table 1 gives the high-efficiency Stairmand cyclone configuration, and the body diameter
can be calculated as follows:

3
500.4 m h = 5500
D 2
c
D = 0.302 m
c
The seven remaining dimensions are obtained from the other relations as

a
= 0.5 → a = 0.151 m
0.302 m
b
= 0.2 → b = 0.060 m
0.302 m
H
= 4.0 → H = 1.208 m
0.302 m
h
= 1.5 → h = 0.453 m
0.302 m
D e = 0.5 → D= 0.151 m
0.302 m e
B
= 0.375 → B = 0.113 m
0.302 m
S
= 0.5 → S = 0.151 m
0.302 m
Barth Model
For v = 10 m/s, the gas volumetric flow rate [Eq. (29)] is given by
i
 m 
Q = 10 (0.151 m )
) (0.060 m
 s 
 m 3  3600s 
3
Q =  0.0906  = 326.2m h
 s  1 h 