B-13 UMGT用極超小型燃焼器における燃焼負荷率が火炎安定性および熱損失に与える影響(燃焼・燃焼器II,一般講演)

概要

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We have developed two types of ultra-micro combustors of UMGT, which are the flat-flame and swirling-flame combustors. To reveal critical issues for the development of ultra-micro combustor, the effects of the space heating rate on flame stability and heat loss of ultra-micro combustors were examined. At flame stability limits of the flat-flame and swirling-flame combustors, the relation of SHR〜1/τ_c was satisfied. It was shown that as the size of combustor decreased, the space heating rate increased to make the flame stable. The heat loss ratio was defined as the ratio of heat loss from the combustor to heat release rate. Heat loss ratios of the flat-flame and swirling-flame combustors satisfied a simple relation of HLR〜1/(l・SHR). The heat loss ratio increases as the size of the combustor decreases, however this value can be reduced by increasing the space heating rate of the combustor.
2006-10-01