Accession Number : ADA296691

Title :   Advanced Propulsion Concept: Step Chamber for Bulk-Loaded Gun.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL N J ARMAMENT ENGINEERING DIRECTORATE

Personal Author(s) : Bracuti, A. J. ; Chiu, D. S. ; MacPherson, A. K.

PDF Url : ADA296691

Report Date : JUN 1995

Pagination or Media Count : 13

Abstract : The military gun community throughout the world has tried to develop bulk-loaded liquid propellant (LP) gun systems because they offer conceptually a great advantage over solid propellant guns. Until now, bulk-loaded guns have not been fielded because of ballistic problems attributed to a combination of combustion instabilities and fluid dynamics. A new chamber concept, step chamber, was developed at ARDEC to control the combustion instabilities and fluid dynamics. This report describes the design of the step chamber and also presents comparative ballistic data obtained from both normal straight chambers and step chambers. The step chambers tested include 1, 2, and 3-step configurations. The data suggest that the incorporation of steps in the combustion chamber wall does, indeed, correct the ballistic problems associated with bulk-loaded LP guns. An explanation is proffered for the efficacy of the step chamber. (KAR) P. 3

Descriptors :   *LIQUID PROPELLANT GUNS, COMBUSTION, PROPULSION SYSTEMS, COMBUSTION CHAMBERS, WALLS, FLUID DYNAMICS, INSTABILITY, SOLID PROPELLANTS, INTERIOR BALLISTICS.

Subject Categories : Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE