E112 UMGT用実機型水素燃料超小型燃焼器の燃焼特性(OS1 マイクロエネルギー変換)

概要

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An engineering-model of hydrogen-fueled flat-flame ultra-micro combustor with a combustion chamber volume of 69.4 mm^3 was developed. To obtain high overall heat-insulation, heat-resistant and strength, the engineering-model combustor had a triple layer structure with an advanced ceramic, a heat insulation material and a stainless steel. The burning test of the combustor showed that it was easy to ignite and burn with a stable flame. Both the stable flame region and the ignition limit were enough wide to satisfy the design operation point of the combustor. The engineering-model combustor attained high combustion efficiency and high space heating rate of 7300 MW(m^3・MPa) with pressure loss around 5%. NOx concentration of the combustor was enough low of less than 3 ppm. While the combustor had good combustion characteristics, the heat loss ratio was high of 51 % of the heat release and the combustor had a large heat capacity. The heat transfer at the exit slit must be reduced and the combustor wall must be thinner.
一般社団法人日本機械学会の論文
2009-06-28