Specific features of the combustion of rich hydrogen air mixtures

Hydrogen is a promising and ecological fuel. Hydrogen is a simple diatomic gas but its combustion and detonation processes are not well understood yet. It generates a lot of dispute in the scientific community. The combustion of rich model hydrogen air mixtures at initial temperatures of 20 oC is considered in this paper. The results of experiments in the pipe 1 m long with inner diameter of 66 mm are presented. In combustion of mixtures with a hydrogen concentration from 77% to 78% we discover the effect of existence of two pressure maxima. The theoretical explanation proposed.