Jet Engine Burn-Through Flame Characteristics.

Abstract

Tests were run to determine the effect of the angle and radius of curvature of a firewall, with respect to a burn-through flame, on burn-through time. No difference was noted in burn-through time for angles of zero-, 10-, or 20-degrees. A slight increase was noted at 30 degrees, and at 40 degrees no burn-through occurred. No great difference in burn-through time was noted with a change in the curvature of the firewall. Centerline flatplate impingement pressures and temperatures were measured and graphed for burn-throughs having pressure ratios of 11:1, 9:1, 6:1, and 4:1, and hole sizes of 1, 1.5, and 2 inches. The exit velocity, density, and mass-flow rate were also calculated for those flames. The radial flatplate impingement profile was mapped for an 11:1 pressure ratio flame from a 1.5-inch hole. Flame characteristics of 16:1, 20:1, and 25:1 pressure ratio burn-throughs were estimated. (Modified author abstract)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1974
Accession Number
AD0781795

Entities

People

  • Richard Hill

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Curvature
  • Engines
  • Flow
  • Flow Rate
  • Geometric Forms
  • Geometry
  • Jet Engines
  • Lines (Geometry)
  • Mass
  • Mass Flow
  • Physical Properties

Readers

  • Aerodynamics.
  • Combustion Dynamics and Shock Wave Physics.
  • Fire Suppression Systems Design.