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0Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
Cargo Fire Suppression by Depressurization Tests
Federal AviationAdministration
Dick HillAJP-632; Fire Safety TeamWm. J. Hughes Technical CenterFederal Aviation Administration
1Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
PressureTransducer
(Top View)
10 m Pressure Vessel
3Thermocouple
Line to vacuum pump
Inlet valve
Test samples
2Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
Acrylic Burn Rate vs Altitude
0.000
0.005
0.010
0.015
0.020
0.025
0.030
0.035
0.040
0.045
SL 8K 16K 18K 20K 22K 24K 26K
Altitude
Bur
n R
ate
(cm
/sec
ond)
3Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
JetA Burn Rate vs Altitude
0.000
0.020
0.040
0.060
0.080
0.100
0.120
SL 8k 16k 18k 20k 22k 24k 26k
Altitude
Bur
n R
ate
(gra
ms/
sec)
4Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
Jet A Mass Loss vs. Altitude
y = -0.163x + 8.1807
0.001.002.003.004.005.006.007.008.009.00
0.0 5.0 10.0 15.0 20.0 25.0 30.0
Altitude
gm/M
inut
e
5Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
Propanol mass loss Vs Altitude
y = -0.1668x + 9.2124
0.00
2.00
4.00
6.00
8.00
10.00
0.00 5.00 10.00 15.00 20.00 25.00 30.00
Altitude
gm/M
inut
e
6Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
Acrylic Burn Rate vs. Altitude
y = -0.053x + 2.2747
0.00
0.50
1.00
1.50
2.00
2.50
0 5 10 15 20 25 30
Altitude
Bur
n R
ate
cm
/min
ute
7Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
Heated Lithium Ion Battery vs Altitude
0.0
2.5
5.0
7.5
10.0
12.5
15.0
17.5
20.0
22.5Se
a Le
vel (
14.7
psia
)
8K' (
10.9
2 ps
ia)
16K'
(7.9
6 ps
ia)
18K'
(7.3
4 ps
ia)
20K'
(6.7
5 ps
ia)
22K'
(6.2
0 ps
ia)
24K'
(5.6
9 ps
ia)
26K'
(5.2
2 ps
ia)
Altitude
Min
utes
Flame OutIgnitionpop
8Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
Altitude vs Time to Battery Venting & Ignition1.6 L/min Propane Flame - 10g Single Lithium Primary Battery
0
20
40
60
80
100
120
140SL
(14.
7 ps
ia)
8K' (
10.9
2 ps
ia)
16K'
(7.9
6 ps
ia)
18K'
(7.3
4 ps
ia)
20K'
(6.7
5 ps
ia)
22K'
(6.2
psi
a)
24K'
(5.6
9 ps
ia)
26K'
(5.2
2 ps
ia)
Altitude
Seco
nds
Battery VentingIgnition
9Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
PressureTransducer
(Top View)
10 m Pressure Vessel
3Thermocouple
Line to vacuum pump
Inlet valve
10Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
11Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
8,000 Feet to 18,000 Feet
0
200
400
600
800
1,000
1,200
1,400
0:00:00 0:07:12 0:14:24 0:21:36 0:28:48 0:36:00 0:43:12 0:50:24
Time (HH:MM:SS)
Tem
pera
ture
(°F)
0
5
10
15
20
25
%O
2 / P
SI
Ch #1: T/C 1 (°F) Ch #5: PressTrans (PSI) Ch #8: Oxygen Analyzer (%O2)
12Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
8,000 Feet to 24,000 Feet
0
200
400
600
800
1,000
1,200
1,400
0:00:00 0:07:12 0:14:24 0:21:36 0:28:48 0:36:00 0:43:12 0:50:24 0:57:36 1:04:48
Time (HH:MM:SS)
Tem
pera
ture
(°F)
0
5
10
15
20
25
%O
2 / P
SI
Ch #1: T/C 1 (°F) Ch #5: PressTrans (PSI) Ch #8: Oxygen Analyzer (%O2)
13Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
Cruise @ 8,000 Feet
0
200
400
600
800
1,000
1,200
1,400
0:00:00 0:07:12 0:14:24 0:21:36 0:28:48 0:36:00 0:43:12 0:50:24
Time (HH:MM:SS)
Tem
pera
ture
(°F)
0
5
10
15
20
25
%0 2
/ PS
I
Ch #1: T/C 1 (°F) Ch #5: PressTrans (PSI) Ch #8: Oxygen Analyzer (%O2)
14Federal AviationAdministration
Cargo Fire Suppression by Depressurization Tests
Cruise @ 8,000 feet with Halon
0
50
100
150
200
250
300
350
400
450
500
0:00:00 0:07:12 0:14:24 0:21:36 0:28:48 0:36:00 0:43:12
Test Time (HH:MM:SS)
Tem
pera
ture
-2
0
2
4
6
8
10
12
14
16
Ch #1: T/C 1 (°F) Ch #3: Analyzer (%) Ch #5: PressTrans (PSI)
