Accession Number : AD0774326

Title :   Erosive Effects of Combustion Gases on Metallic Combustion Chambers.

Descriptive Note : Final rept. (Part 2), 1 Oct 71-30 May 72,

Corporate Author : PRINCETON UNIV N J DEPT OF AEROSPACE AND MECHANICAL SCIENCES

Personal Author(s) : Plett,Edelbert G. ; Shrader,Rose E. ; Summerfield,Martin

Report Date : OCT 1972

Pagination or Media Count : 66

Abstract : Experiments conducted with several aluminum alloys and a number of different propellants, with isochoric flame temperatures ranging from 2197 to 3000K, demonstrated again that the onset of erosion corresponds to the onset of melting of tha luminum. Lower concentrations of CO2 and H2O were found to occur in HMX propellants and erosion data showed considerably lower excess erosion with these propellants. Synergistic erosion of steel was also substantially reduced by the use of HMX propellant compared with the more commonly used IMR propellant. A spectrograph and a residue catcher and analysis technique was used respectively to demonstrate that propellant products oxidize the eroding aluminum and that the metal is molten when removed from the surface. (Modified author abstract)

Descriptors :   *Gun propellants, *Erosion, *Combustion products, Aluminum alloys, Combustion chambers, Carbon dioxide, Water vapor, Gun propellants, Melting, Steel, Titanium, HMX, Chemical reactions, Mathematical models, Ignition, Explosives, Spectroscopy

Subject Categories : Ammunition and Explosives
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE