21115 微小重力下での希薄炭化水素-空気混合気の燃焼特性に及ぼす雰囲気湿度の影響について(第2報)(燃料と燃焼の新しい展開(3),OS.9 燃料と燃焼の新しい展開,学術講演)

概要

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In practical internal combustion engines, where it is very important to achieve the low emissions (CO_2,NO_x,SO_x). It is well known that the lean burn is very useful method to reduce the emissions by control of flame temperature. Therefore, in this study, at low oxygen concentration high humidity mixture was used for flame temperature reduction. Experiments have been carried out with lean propane-air mixtures to examine the influence of oxygen concentration under high-humidity air and dry air conditions on flame shape and flame speed in a combustion tube. The experimental results in this study are as follows. : (1) Under low oxygen concentration, the addition of water vapor is very effective to increase the flame speed under normal and microgravity. (2) Influence of atmosphere humidity on flame speed depends on a fuel property.
社団法人日本機械学会の論文
2008-03-13