Combustion of Hydrogen-Steam-Air Mixtures near Lower Flammability Limits

Abstract

Abstract The combustion of hydrogen-steam-air mixtures near lower flammability limits has been studied in a 2.3-m diameter spherical vessel. The concentrations investigated included hydrogen below 10 percent and steam up to 30 percent by volume. The effects of fan-induced turbulence were investigated only qualitatively. It was found that turbulence markedly affects combustion, with or without stearn. Bottom ignition resulted in faster and more complete combustion than central ignition, other factors remaining the same. Addition of small quantities of steam did not affect the degree of combustion with bottom ignition.