Accession Number : AD0781795

Title :   Jet Engine Burn-Through Flame Characteristics.

Descriptive Note : Final rept. Jan-Sep 73,

Corporate Author : NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J

Personal Author(s) : Hill,Richard

Report Date : JUL 1974

Pagination or Media Count : 37

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)

Descriptors :   *Jet engines, *Combustors, *Burnthrough, Jet flames, Commercial aviation, Fuel burn up, Combustion, Impingement

Subject Categories : Combustion and Ignition
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE