Accession Number : AD0851090

Title :   Flame Propagation in Propellant Cracks.

Descriptive Note : Interim rept. Nov-Dec 67,

Corporate Author : AIR FORCE ROCKET PROPULSION LAB EDWARDS AFB CA

Personal Author(s) : Payne, Charles E.

Report Date : APR 1969

Pagination or Media Count : 19

Abstract : This is a report of work relating to the spread of solid propellant flames into cracks present in the propellant surface. The tests were performed in a no-flow environment within a high-pressure, windowed combustion bomb. Data were all recorded by high-speed motion picture camera and all test conditions were identical -- 700 psia, and ambient initial propellant temperature. Test results point to no lower minimum crack width which will exclude flame penetration. The time required for flame entry into cracks decreases with decreasing crack width and propagation rates within a crack increase as crack width decreases. (Author)

Descriptors :   *FLAME PROPAGATION), (*SOLID ROCKET PROPELLANTS, PROPELLANT GRAINS, SURFACE PROPERTIES, HIGH SPEED PHOTOGRAPHY, CRACKS.

Subject Categories : Combustion and Ignition
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE