1 / 19

Engine Nacelle Halon Replacement, FAA, WJ Hughes Technical Center

Learn about equivalence process, mass/concentration methods, test results, and remaining work for Halon replacements in engine nacelles.

bpresley
Download Presentation

Engine Nacelle Halon Replacement, FAA, WJ Hughes Technical Center

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ 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/ SLIDE# 1

  2. 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 Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 2

  3. briefly EXPLAIN the equivalence process International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 3

  4. 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 Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 4

  5. CONCENTRATION TEST FIRE TEST 6% Volumetric Concentration ESTABLISH BENCHMARK for HALON 1301 RTD(ave, H1301) certification Time (sec) Halon 1301 Replacement Candidate CONCENTRATION TEST FIRE TEST CEQUIV FIND MASS EQUIVALENT OF THE REPLACEMENT CANDIDATE RTD(ave, rep.can)  RTD(ave, H1301) Volumetric Concentration “certification” Time (sec) Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Analyzer Probes, Certification SLIDE# 5

  6. EXPLAIN the equivalent mass and concentration methods International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 6

  7. 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 Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 7

  8. EQUIVALENCE METHOD - CONCENTRATION A Representation of Typical Concentration Traces for Halon 1301 and a Mass Equivalent Amount of a Replacement Candidate at the Flame Front Halon 1301 • 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. Replacement Candidate 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 H1301 CEQUIV International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 6% certification 6% Concentration Equivalence Step #1 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA Establish the duration that the Halon 1301 concentration at the flame front is at/above 6% v/v. t H1301 Volumetric Concentration SLIDE# 8 Time (sec)

  9. International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA • 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 SLIDE# 9

  10. duration of Halon 1301 for concentration  6%v/v Equivalent concentration for the replacement candidate International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 10

  11. ILLUSTRATE results to date International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 11

  12. 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 Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 12

  13. RESULTS TO DATE - CONCENTRATION EQUIVALENCE International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA Analyzer Probes, Pool Analyzer Probes, Spray SLIDE# 13

  14. International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 14

  15. DISCUSS what work remains International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 15

  16. 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 Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA Click Here to End SLIDE# 16

  17. GAS ANALYZER PROBE ARRANGEMENT, HALON 1301 CERTIFICATION WORK REGION OF FLAME DURING FIRE TEST UP STA 502 STA 527 FWD 11 10 1 2 4 12 9 3 UP 12:00 7 5 LOOKING FWD DIMENSIONS ARE IN FEET UNLESS NOTED OTHERWISE RIGHT 3:00 8 6 International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 17 5 13

  18. GAS ANALYZER PROBE ARRANGEMENT, HALON 1301 CERTIFICATION WORK REGION OF FLAME DURING FIRE TEST UP STA 502 STA 527 FWD 11 10 12 4 2 1 9 3 UP 12:00 LOOKING FWD 5 DIMENSIONS ARE IN FEET UNLESS NOTED OTHERWISE 7 RIGHT 3:00 8 6 International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 18 13

  19. EQUIVALENCE METHOD - CONCENTRATION 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 ~ 8% 9% 7% 6% 10% Volumetric Concentration Time (sec) DURATIONS AT/ABOVE A GIVEN CONCENTRATION International Aircraft Systems Fire Protection Working Group Atlantic City , NJ USA 5Nov2003 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-440 Atlantic City Int'l Airport, NJ 08405 USA SLIDE# 19

More Related