Abstract
Combustion characteristics of propane flame with high space heating rate in an annular-type combustor for a several hundreds W-class micro gas turbine were investigated. The flame shape, flame stability limit, flame length and temperature distribution in the combustor were measured varying the orifice ratios, which were 0, 0.19 and 0.36, as the experimental parameter. It was considered that the flame shape was influenced by the combustor axial velocity at the orifice, orifice ratio and fuel/air concentration in the orifice upward region. In the case of orifice ratio of 0.19, a circular propane flame with short flame length was observed in the orifice upward region. Temperature distribution in the combustor showed that this flame could have high space heating rate.
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