Multifuel systems: methane–hydrogen–water vapor

New data on parameters of combustion and detonation of two-fuel mixtures of methane and hydrogen with oxygen and air are presented. The data are obtained with variations of both the ration between $\mathrm{CH}_4$ and $\mathrm{H}_2$ and also the ratio between the fuel components and oxidizer. Results for the critical energy of detonation initiation, characteristic size of detonation cells, detonation velocity, and energy release in detonation waves are included. New information on parameters of combustion and detonation of methane mixtures diluted by water, including situations with gas hydrates, is reported.