Page 270 - The Tribology Handbook
P. 270
byrinths, brush seals and throttling bu
r$%? l/c = 0.375 n = number of blades
= 6.2 5
I---
0 = 300°K
- *
0.38mm 1 rnm
(0.015 in) 10.040 in)
I
0.5
P max. - 0.2
n n
2 :3 4 5 6 7 8 9 10"
P atmos.
TEMPERATURE
STEPPED LABYRINTH
17.3
For other temperatures multiply Qm/A by - For a stepped labyrinth use an 'effective' n value, kn:
fl (see below right)
GEOMETRY
For other values of slc or llc multiply Qm/A by g:
(see below left)
3.0
"'-5
a
5 2.5
d
> t 2.0
I
E 1.0 Y
w 1.5
z
0
w
0 1.0
0.5 0.5
0.4 0.6 0.8 1.0 2.0 4.0 6.0 8.0 10.0 0 1 2 3 +-- 5 6 7 8
4
1. IC,
Figure 22.8 Calculation of mass flow rate of labyrinth
B22.5