278
APPENDIX VII
The frictional resistances met with in the cinder pockets will
be assumed as equal to those computed for the neck.
The uptakes will be proportioned as follows, and their frictional
resistances computed:
Gas on Gas
Air on Air
Gas on Waste Gas
Air on Waste Gas
Qt — volume of gases flowing . . Vi ~~ velocities assumed ......
28 m3 75 15 m/sec
45 m3 99 10 m/sec
35 m3 66
52 m3 08
co = area of uptake, total ....
2m2 00
4m2 60
N ~~ number of uptakes
1
2
2^ — velocity, actual ....
14m 4
10m 00
17 m 83
11 m 32
$ = perimeter (assumed) ....
5 m 00
12 m 0
L ~~ height =
3 m 00
$£ _•_ w — ....
7 50
7.83
7 — frictional resistance in kg per m2 = 0 016X7 50X14 40X0 208 =
0 kg 360
0 016X7 83X10 00X0 239 =
0 kg 300
0 016X7 50X17 83X0 192 =
0 kg 411
0 016X7 83X11 32X0 192 =
0 kg 274
The pressure necessary to impress their velocity upon the flow-ing gases will be* .......
— A<(i)2 — '2(]} — Irgr T\QT rn~
2 kg 199
1 kg 219
3 kg 111
1 kg 254
The assumption is made that the turn into the uptakes for the
incoming gas and air absorbs the velocity in the necks and cinder
pockets.
Gas on Gas
Air on Air
Gas on Waste
Gas
Air on Waste
Gas
Frictional resistance of f antails for
air and gas :
$= perimeter (assumed) ....
6 m 00
10 m 00
L =length ................
5 m 00
6 m 00
C4 = area ...........
3 m2 00
5 m225
t = average temperature. . . .
500°
150°
800°
600°
i _r_ ,y __ ffo s factor ..............
2.835
1 . 5505
3.936
3.202