Investigation of Air-Augmented Rocket Combustion and Mixing Processes.
Final technical rept. Sep 66-Jul 68,
ATLANTIC RESEARCH CORP ALEXANDRIA VA
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The results of an experimental and theoretical study of coaxial jet mixing and combustion are presented. The characteristics of a primary stream were systematically varied through a broad range of conditions and the exchange processes occuring in a secondary chamber were observed by means of wall pressure measurements, wall calorimeters and chemical sampling. Primary stream variables studied include temperature 1000-3000K, chemical reactivity 0-400 kcal100g, particulate matter content 0-50 percent, particle diameter 2,200 microns, radio of gas phase to solid phase reactivity 0-1, primary stream momentum, and exit plane geometry. Secondary stream parameters studied were velocity 500-1000 ftsec and temperature 300 - 1000K. Analysis of the data shows that the length of the duct required for momentum and energy exchange is dominated in all instances primarily by secondary air mass flow. The data also show that boron combustion efficiency is highly dependent upon primary and secondary stream temperature. Combustion efficiency data were able to be correlated assuming a diffusion controlled heterogeneouse combustion process. An analytical treatment of a two-phase mixing process in the region of the potential core is presented and wall static pressures computed over this region are compared with experimentally determined trends. Author
- Combustion and Ignition
- Liquid Propellant Rocket Engines