Experimental Investigation on Combustion of High-Metal Magnesium-Based Hydroreactive Fuels

摘要

The experimental study in this paper focused on the combustion wave temperature measurement and the qualitative observation of phenomena involved in the combustion of a high-metal magnesium-based hydroreactive fuel strand, using a pressure-regulated test combustor. An experimental system was designed and experiments were carried out in both argon and water vapor atmosphere. Two types of hydroreactive fuel were investigated: one containing 60% magnesium particles and the other one containing 73% magnesium particles. Thermal-wave structures of the combustion wave of the hydroreactive fuel were measured by an imbedded type-K fine-wire thermocouple. The surfaces of fuel samples quenched by rapid depressurization were examined in a scanning electron microscope. The chemical composition on the burned surface of the hydroreactive fuel strand was determined by X-ray diffraction analysis. The experimental phenomena implies that magnesium particles in the 60% magnesium fuel are ejected into the gas phase and combust, whereas magnesium particles in the 73% magnesium fuel stay on the burning surface and combust Using these experimental results, the effect of the amounts of metal additives on the combustion of the high-metal magnesium-based hydroreactive fuel was postulated and the physical combustion model was proposed.