Abstract
We have investigated the flame stability of a can-type propane-fueled combustor with a diameter of 50mm for a kW-class micro-gas turbine. The effects of the diameter and number of the fuel injection holes and the position of the fuel injector on flame stability and the temperature distribution near the injector rim were studied experimentally. When a strong re-circulation zone developed near the injector exit, the flame stability satisfied the design point of the combustor, and mcreased with a decrease of the hole diameter and hole number. The stability mechanism was discussed, and the role of high temperature gas passing through the intervals of injection holes was clarified.
