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Fuel Tank Ignition Experiments at Reduced Oxygen Concentrations

Fuel Tank Ignition Experiments at Reduced Oxygen Concentrations. Steve Summer Systems Fire Protection Working Group Wilson, NC July 17 – 18, 2001. Objectives. Determine the Lower Oxygen Limit of Flammability (LOLF) at altitudes varying from 0 - 40 kft.

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Fuel Tank Ignition Experiments at Reduced Oxygen Concentrations

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  1. Fuel Tank Ignition Experiments at Reduced Oxygen Concentrations Steve Summer Systems Fire Protection Working Group Wilson, NC July 17 – 18, 2001

  2. Objectives • Determine the Lower Oxygen Limit of Flammability (LOLF) at altitudes varying from 0 - 40 kft. • What is the lowest O2 concentration that results in ignition of the ullage fuel vapors? • Determine the effect of the ullage O2concentration on the resultant pressure rise.

  3. Test Facility

  4. Apparatus

  5. Apparatus

  6. Apparatus

  7. Test Program • Methane Validation Tests • Determine LFL of Methane at Sea Level and compare to numbers cited in literature. • Tests performed at CH4-air concentrations ranging from 4.35 - 5.5% CH4.

  8. Results: Methane Validation Tests

  9. Test Program • JP-8 LOLF Tests • Determine ullage oxygen concentration needed to inert the fuel tank at altitudes of 0 - 40 kft. • Determine the effect of the ullage O2concentration on the resultant pressure rise.

  10. Results: JP-8 LOLF Tests

  11. Results: JP-8 LOLF Tests

  12. Future Plans • Pressure measurements • Piezoresistive sensors mounted behind porous metal discs. • Similar configuration to Joe Shepherd’s work. • Approximately 2 months before testing can begin.

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