Accession Number : ADD012331

Title :   Solid Fuel Burn Enhancer.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Nagy,

Report Date : 17 Mar 1986

Pagination or Media Count : 20

Abstract : This patent application relates generally to solid fuel ramjet engines, and more specifically to a solid rocket motor construction which allows the burn rate to be controlled by variations in the oxidizer content. A solid rocket motor grain construction is disclosed for use in a ramjet to improve performance. The solid fuel burn enhancer adds oxidizer for burn rate control. Two constructions are disclosed. The inlaid approach places cores of solid low-oxidizer fuel within solid unoxidized fuel and the integrated approach provides shells of low-oxidizer around the solid unoxidized fuel. The low-oxidizer fuel has a faster burn rate and smaller burn area requirements than the unoxidized fuel. During initial ramjet operation, when the burn area is constrained, the low oxidizer fuel burns initially with its smaller burn area requirements. Subsequently, the conventional unoxidized fuel burns when larger burn areas are available. Keywords: Rocket propellant grains; Solid rocket oxidizers; Solid rocket fuels; Rocket ramjets.

Descriptors :   *PATENT APPLICATIONS, *ROCKET PROPELLANT GRAINS, *BURNING RATE, *SOLID ROCKET OXIDIZERS, CONSTRUCTION, CONTROL, CORES, OPERATION, OXIDIZERS, RAMJET ENGINES, ROCKET RAMJETS, SOLID FUELS, SOLID PROPELLANT ROCKET ENGINES, SOLID ROCKET FUELS, INTEGRATION, OPTIMIZATION

Subject Categories : Air Breathing Engines(unconventional)
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE