Ultra Micro Gas Turbine用Flat-Flame型超小型燃焼器の熱輸送評価

概要

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This paper has investigated heat transfer phenomena in Flat-Flame ultra-micro combustor for Ultra Micro Gas Turbine (UMGT) experimentally by temperature measurements and evaluated its characteristics. Heat transfer at the combustor exit slit was the most dominant which caused not only heat losses to the outside of the combustor but also recircultation of the exhausted gas enthalpy by exchanging heat with unburned premixture upstream of the injector. Recircultation of the exhausted gas enthalpy and radiation from the nozzle prompted faster reaction within the combustion chamber by preheating the unburned premixture, which was essential to obtain complete combustion and extremely high space heating rates with Flat-Flame ultra-micro combustors. In order to increase insulation performance of ultra-micro combustors, heat transfer at the combustor exit slit must be minimized, or it may be utilized as heat source of fuel reforming such as methanol and dimethyl ether (DME).
社団法人日本ガスタービン学会の論文
2005-05-20