Abstract
As a part of the "Towards the Development of Finger-Top Gas Turbines" project in Japan, a finger-top size hydrogen-fueled flat-flame micro-combustor with a chamber volume of 480[mm^3] was fabricated and tested. Stable flat-flames of premixed hydrogen/air were formed in the combustion chamber. The combustor efficiencies achieved were more than 99.8% at the equivalence ratios of over 0.38, and the maximum temperature in the combustion chamber was almost equal to adiabatic temperature at equivalence ratio of 0.34. For methane, the effects on flame stability of an upper wall in the combustion chamber were examined by varying a height of the combustor. It was confirmed that the minimum height was 3.3[mm] to form a stable flat-flame within the combustion chamber.
