Post on 31-Mar-2015
International Aircraft Systems Fire Protection Working Group
Atlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
Engine Nacelle Halon Replacement,FAA, WJ Hughes Technical Center
Point of Contact : Doug Ingerson
Department of Transportation
Federal Aviation Administration
WJ Hughes Technical Center
Fire Safety Branch, AAR-440
Bldg 205
Atlantic City Int'l Airport, NJ 08405 USA
tel: 609-485-4945
fax: 609-485-7074
email: Douglas.A.Ingerson@faa.gov
web page: http://www.fire.tc.faa.gov/
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# 1
CONTENTS
• briefly EXPLAIN the equivalence process
• EXPLAIN the equivalent mass and concentration methods
• ILLUSTRATE results to date - mass/concentration equivalence
• DISCUSS what work remains
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 2
• briefly EXPLAIN the equivalence process
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 3
PROJECT OBJECTIVES
• GENERATE A PROCEDURE WHICH CAN BE USED BY ANYONE TO DEMONSTRATE EQUIVALENCE TO HALON 1301 IN THE NACELLE
• PRODUCE CERTIFICATION CRITERIA FOR HFC-125 AND CF3I
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 4
Halon 1301
Vol
umet
ric
Con
cent
rati
on
certification
6%
Time (sec)
CONCENTRATION TEST
ESTABLISH BENCHMARK for
HALON 1301
RTD(ave, H1301)
FIRE TEST
FIND MASS EQUIVALENT OF THE
REPLACEMENT CANDIDATE
RTD(ave, rep.can) RTD(ave, H1301)
FIRE TEST
Replacement Candidate
Vol
umet
ric
Con
cent
rati
on
Time (sec)
CONCENTRATION TESTCEQUIV
“certification”
AnalyzerProbes,
Certification
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 5
• EXPLAIN the equivalent mass and concentration methods
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 6
EQUIVALENCE METHOD - MASS
• HALON 1301 CHARACTERIZED AGAINST FIRE THREATS
• USING SALIENT ENVIRONMENTAL ASPECTS IN A TEST FIXTURE
• 2 COMBUSTION SCENARIOS - SPRAY & POOL
• 3 FUELS - TURBINE FUEL, LUBRICANT, HYDRAULIC FLUID
• MEASURE THE DURATION THE FIRE IS EXTINGUISHED
• BENCHMARK BASED ON THE AVERAGE OF 5 TESTS
• ITERATE MASS OF THE REPLACEMENT CANDIDATE
• AGENT DISTRIBUTION CONSTRAINED - NOT OPTIMIZED
• AVERAGE OF 5 TESTS MUST EQUAL OR EXCEED HALON BENCHMARK
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 7
Halon 1301
Replacement Candidate
Vol
umet
ric
Con
cent
rati
on
A Representation of Typical Concentration Traces for Halon 1301 and a Mass Equivalent Amount of a
Replacement Candidate at the Flame Front
Time (sec)
Concentration Equivalence Step #1
Establish the duration that the
Halon 1301 concentration at the flame front is at/above 6% v/v.
6%
t H1301
EQUIVALENCE METHOD - CONCENTRATION
Concentration Equivalence Step #2
Use the duration from the Halon
1301 concentration profile and review the profile of the
replacement candidate to find the corresponding
concentration (CEQUIV).
t H1301CEQUIV
certification
Notice the characteristics of the typical trace at the flame front in the certification profile :
• Exponential growth & decay does not permit a square wave function to meet certification.
• A marginal increase in the concentration profile ensured the variability in testing never produced a concentration profile less than certification.
• The concentration trace exceeds 6%v/v Halon 1301 for more time than 0.5 second.
6%
Inte
rnat
iona
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tem
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ire
Prot
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orki
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Atl
anti
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US
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03
Federal A
viation Adm
inistrationW
J Hughes T
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Atlantic C
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AS
LID
E#
8
Equivalence for concentration
• spray fire work based on channels 1 & 2
• evaluated channels for the duration at or above 6% v/v
• took average of the 2 channels over 3 tests
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 9
duration of Halon 1301 for
concentration 6%v/v
Equivalent concentration for the replacement
candidate
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 10
• ILLUSTRATE results to date
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 11
RESULTS TO DATE - MASS EQUIVALENCE
• WARNING !!
• DO NOT USE THESE NUMBERS FOR COMPARISON
• AGENT DISTRIBUTION IS NOT OPTIMIZED
• REPLACEMENT CANDIDATE QUANTITIES ARE ARTIFICIALLY LARGE
• GAS CONCENTRATION IS THE ONLY VALID BASIS FOR COMPARISON
• QUANTITIES REPORTED FOR THE PURPOSE OF COMPLETENESS
• SPRAY FIRE, HIGH VENTILATION
• 3.6 LBF HALON 1301 = 8.0 LBF HFC-125 = 4.5 LBF CF3I
• POOL FIRE, HIGH VENTILATION
• 3.6 LBF HALON 1301 = 5.5 LBF HFC-125
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 12
AnalyzerProbes,
Pool
AnalyzerProbes,Spray
RESULTS TO DATE - CONCENTRATION EQUIVALENCE
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 13
International Aircraft Systems Fire Protection Working Group
Atlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 14
• DISCUSS what work remains
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 15
TESTING REMAINING
• CF3I => pool @ high ventilation
• HFC-125 => spray & pool @ low ventilation
• CF3I => spray & pool @ low ventilation
• HFC-125 & CF3I cold agent proof tests
• COMPLETION => SUMMER 2004
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 16
Click Here to End
9
11
8
1
75
3
6
1210
4
REGION OF FLAMEDURING FIRE TEST
FWD
UP
RIGHT3:00
UP12:00
ST
A 5
02
ST
A 5
27
2
DIMENSIONS AREIN FEET UNLESS
NOTED OTHERWISE
LOOKINGFWD
GAS ANALYZER PROBE ARRANGEMENT, HALON 1301 CERTIFICATION WORK
5
13
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 17
9
11
8
1
7
2
3
6
1210
4
REGION OF FLAMEDURING FIRE TEST
FWD
UP
RIGHT3:00
UP12:00
ST
A 5
02
ST
A 5
27
5DIMENSIONS AREIN FEET UNLESS
NOTED OTHERWISE
LOOKINGFWD
GAS ANALYZER PROBE ARRANGEMENT, HALON 1301 CERTIFICATION WORK
13
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA
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# 18
A Representation of a Typical Concentration Trace for a Mass Equivalent Amount of a
Replacement Candidate at the Flame Front
~ Generating the Concentration Data Pool for the Replacement Candidate ~
EQUIVALENCE METHOD - CONCENTRATION
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# 19
Vol
umet
ric
Con
cent
rati
on
Time (sec)
8%
9%
7%
6%
10%
DURATIONS AT/ABOVE A GIVEN CONCENTRATION
International Aircraft Systems Fire Protection Working GroupAtlantic City , NJ USA 5Nov2003
Federal Aviation AdministrationWJ Hughes Technical Center, Fire Safety Section, AAR-440
Atlantic City Int'l Airport, NJ 08405 USA