The ignition of hydrogen-air mixtures by a stationary hot glow plug has been experimentally
investigated using two-color pyrometry and interferometry. The ignition process was
characterized by the surface temperature at ignition, as well as by the location where the
initial flame kernel was formed. The experimental results indicate that:(i) the ignition
temperature threshold is a function of equivalence ratio;(ii) the ignition location is a function
of the rate at which the glow plug is heated because high heating rates favor non-uniform …