Experimental investigation on the behaviors and temperature distribution of cryogenic hydrogen jet flames

Abstract

The jet flame resulting from the ignition of released cryogenic hydrogen is a threat to the surrounding people and facilities. However, the behaviors and temperature distribution of cryogenic hydrogen jet flame are still unclear. In this study, experiments are conducted at different release temperatures and release pressures. It has been found that the length and width of the jet flame increase as the release pressure increases and the release temperature decreases. The prediction model of cryogenic hydrogen jet flame length and width considering release pressure and temperature is proposed. The temperature of the cryogenic hydrogen jet flame increases with the increase of the release pressure and decrease of the release temperature as well. The temperature on the centerline can be expressed as a function in flame calibers, and the critical separation distance can be calculated based on three criteria. The dimensionless jet flame temperature distribution presents a three-stage distribution.