出力数百W級超小型ガスタービン用プロパン燃焼器の開発(マイクロエネルギー変換,<特集>第13回動力・エネルギー技術シンポジウム)

概要

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An annular-type micro combustor was developed for a several hundred W-class micro gas turbine. Propane which is a liquid fuel having a large vapor pressure of 0.8Mpa at room temperature was used. A lean-premixed combustion method was applied to realize low NO_x emission. To prevent flash back when using premixture, the fuel was injected directly into the upstream region of the combustion chamber and formed the premixture. An orifice was located in the chamber to promote the fuel/air mixing and the flame stability. The flame stability limit showed enough wide operation regions including design point. The CO concentrations were less than 70ppm at the equivalence ratios over 0.42. The NO_x emission was around 20ppm (@16%O_2) at the design point. The combustor attained the high space heating rate of 800MW/(m^3・MPa) and the high combustion efficiency more than 99.5%.
2009-03-25