PERLIMINARY EVALUATION OF THE AIR ANF FUEL SPECIFIC-IMPULSE CHARACTERISTICS OF SEVERAL POTENTIAL RAM-JET FUELSⅡ – MAGNESIUM AND MAGNESIUM-OCTENE-1 SLURRIES

摘要

A preliminary analytical evaluation of the air and fuel specific-impulse characteristics of magnesium and magnesium - octene-1 slurries was made.nAdiabatic combustion flame temperature, air specific impulse, and fuel-weight specific impulse are given for each fuel. The air and fuel-weight specific-impulse data for octene-1, which was taken as representative of hydrocarbon performance, are presented for comparison.nThe combustion flame temperatures available with magnesium and magnesium - octene-1 slurries are greater than those for octene-1. The air specific impulse, or thrust, available for magnesium and for magnesium - octene-1 slurries exceeds that available for octene-1. Ram-jet combustor operation with magnesium hydrocarbon slurries offers a means of improving the fuel-weight specific impulse attainable with magnesium alone and of increasing the limiting air specific impulse attainable with hydrocarbon alone.nUnder the conditions considered in the calculations, aluminum gives a better fuel-weight specific impulse than magnesium for all air-specific-impulse values less than 185;for air specific-impulse values greater than 185, magnesium apparently gives superior fuel-weight specific-impulse values. Under the conditions considered in the calculations, magnesium - octene-1 slurries are roughly equal, or superior, to aluminum-octene-1 slurries with respect to fuel-weight specific impulse at a fixed air specific impulse.