Quenching Limits and Materials Degradation of Hydrogen Diffusion Flames

Abstract

This study examines the types of hydrogen leaks that can support combustion and the effects on various materials of long term hydrogen flame exposure. Experimental and analytical work is presented. Measurements included limits of quenching, blowoff, and pilted ignition for burners with diameters of 0.36 to 1.78 mm. Flow rates of 0.019 to 40 mg/s for hydrogen, 0.12 to 64 mg/s for methane, and 0.03 to 220 mg/s for propane were studied. Materials degradation experiments were conducted on carbon steel, stainless steel, aluminum alloy, and carbon fiber. Noticeable corrosion is present on 304 and 316 stainless steel, galvanized 1006 - 1008 carbon steel. Silicon carbide fibers perform relatively similarly for hydrogen and methane flame exposure.