Page 130 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

116 Applied Process Design for Chemical and Petrochemical Plants

limiting Factors
For Sonic Velocity
k = 1.3

~-
~
1.2 .525 .612
1.5 .550 .631
2.0 .593 ,635
3 .642 .658
4 .678 .670
6 .722 .685
8 ,750 ,698
10 .773 .705
15 .807 .718

20 .831 .718
40 .877 .718
100 .920 1 .718

k = 1.4
(k=approximatcly 1.4 for Air. Hz. 02, Nz, CO, NO, and HCI)
1.0 Limiting Factors
For Sonic Velocity
0.95 k = 1.4
-
0.90 K 4P Y
p'1
- -
0.85 - -
1.2 .552 .588
1.5 .576 .606
0.80 2.0 .612 .622
I'
0.75 3 .662 .639
.697 .a9
4
6 .737 .671
0.70
8 .762 .685
10 .784 .695
0.65 15 .818 .702
0.a 20 .839 .710
.883 .710
40
- .710
.926
100
0.55

Figure 2-38A. Net expansion factor, Y, for compressible flow through pipe to a larger flow area. By permission, Crane Co., Technical Paper
#NO, Engineering Div., 1957. Also see 1976 edition.