Erosive Effects of Combustion Gases on Metallic Combustion Chambers.

摘要

Experiments conducted with several aluminum alloys and a number of different propellants,with isochoric flame temperatures ranging from 2197to 3000K,demonstrated again that the onset of erosion corresponds to the onset of melting of tha luminum. Lower concentrations of CO2and 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)