Abstract
Aluminum and boron kerosene slurries were successfully burned in a dump combustor. The apparatus built is described, with emphasis on the slurry fuel supply system and the measuring equipment. The results are presented as combustion efficiency versus fuel-air ratio for kerosene, aluminum and boron slurry. The data for kerosene, which was used for running in the facility and for comparison, show high efficiency (80÷100%). Aluminum was tested below the stoichiometric ratio (0.225) and showed an average efficiency of 80% in the fuel-air range 0.05 to 0.18. Boron reached this level for fuel-air ratios 0.05 to 0.12 (the stoichiometric ratio is 0.091). For lower fuel-air ratios the efficiency drops, since the ignition temperature of boron is not reached. There is an upper limit to the amount of metal that it is advantageous to include in slurries. The droplet size of the slurry appears to be an important parameter and it should be small.
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