SPARK IGNITION OF FLOWING GASES Ⅲ- EFFECT OF TURBULENCE PROMOTER ON ENERGY REQUIRED TO IGNITE A PROPANE-AIR MIXTURE

摘要

An investigation was conducted to determine the effect of turbulence generated by different sizes of wire grid on the minimum sparkignition energy of a flowing propane-air mixture. Test conditions were: pressure, 5 inches of mercury absolute; temperature, 80° F; fuel-air ratio, 0.0835 (by weight); velocity, 50 to 250 feet per second; spark duration, 500 microseconds; and electrode spacing, 0.37 inch. The wire sizes of the turbulence promoters ranged from 0.006 to 0.105 inch in diameter and the promoters were located either 4 3/8 or 6 3/8 inches upstream of the spark electrodes. The investigation was conducted with turbulence having superimposed flow pulsations and duct resonance.