Safety of using hydrogen: Suppression of detonation in hydrogen-air mixtures.

Safety of using hydrogen as fuel in aerospace applications is closely connected with hydrogen explosion safety during its transportation and stockpiling at launch places. In this paper, preventing the detonation propagation in the mixtures of hydrogen with air due to accidental hydrogen releases is studied in numerical experiments. Another fuel - hydrocarbon propylene – is studied as an optional inhibitor to be added in a small volume quantity to hydrogen-air mixture. The dependence of detonation wave cellular structure on the content of inhibitor is studied for different fuel-air ratios. The results make it possible determining the content of inhibitor sufficient for preventing the detonation onset or destroying the existing detonation wave. • Preventing the detonation propagation in the mixtures of hydrogen with air is studied numerically. • Another fuel - hydrocarbon propylene – is studied as an optional inhibitor. • The dependence of detonation wave cellular structure on the content of inhibitor is studied for different fuel-air ratios. • The content of inhibitor sufficient for preventing the detonation onset or destroying the existing detonation wave. [ABSTRACT FROM AUTHOR]