Experimental Study on the Temperature Characteristics of Cryogenic Hydrogen Jet Flames

Cryogenic compressed hydrogen combines the characteristics of cryogenics and compression, which can significantly enhance hydrogen storage density, thereby enabling more efficient and economical large-scale storage and transportation. Once cryogenic compressed hydrogen leaks during storage and transportation, it may cause accidents such as fires, posing severe threats to personnel and facilities. This study investigated the temperature distribution of cryogenic compressed hydrogen jet flames under different leakage pressures and temperatures and quantitatively analyzed the flame characteristics and safety distances under various working conditions. The results indicate that leakage pressure is the core factor affecting the flame temperature field distribution and hazard range. When hydrogen leaks at high pressure, it exhibits a higher temperature in the hot zone and a wider coverage area, requiring a significantly increased safety distance. In contrast, the leakage temperature has a smaller impact on the flame temperature field and safety distance; at low temperatures, the regularity of the temperature distribution is far weaker than that under high-temperature conditions, and the required protective distance shows little difference from that under normal-temperature conditions.