PRESSURE MODELING OF VERTICALLY BURNING AIRCRAFT MATERIALS

The possibility of evaluating relative rates of upward fire spread on aircraft cabin materials is investigated with small-scale models burned at elevated ambient air pressure. The modeling technique, which preserves the fluid Grashof number of the full-scale fire spread process, is verified in the first part of the study with vertical walls of polymethyl methacrylate (PMMA) fuel ignited at one atmosphere (full-scale) and at elevated absolute pressures (model) to 3.5 MPa (515 psia). In the second phase of the study, fifteen aircraft cabin samples are subjected to a small PMMA ignition source for a range of elevated ambient air pressures. Rates of upward fire spread, characterized by flame height exponential growth factors, are measurable for nearly all the aircraft cabin materials at absolute pressures from 1.18 MPa (165 psia) to 3.2 MPa (465 psia). Ranking of the materials by rate of upward fire spread is facilitated by the nearly two order of magnitude separation between highest and lowest growth factor at each pressure level. This ranking is found to be reasonably independent of pressure, enabling conservative predictions of upward spread behavior at one atmosphere to be made. (Author)

  • Supplemental Notes:
    • Also Available as Rept. no. FAA-NA-79-150. Original contains color plates: All DDC and NTIS reproductions will be in black and white.
  • Corporate Authors:

    Factory Mutual Research Corporation

    1151 Boston-Providence Turnpike
    Norwood, MA  United States  02062

    Federal Aviation Administration

    Systems R&D Service, 800 Independence Avenue, SW
    Washington, DC  United States 
  • Authors:
    • Alpert, R L
  • Publication Date: 1979-1

Media Info

  • Pagination: 64 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00191656
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: 0A0R8 BU Final Rpt., RC78-BT-29
  • Contract Numbers: DOT-FAA77NA-4048
  • Files: NTIS, TRIS, USDOT
  • Created Date: Jun 13 1979 12:00AM