センターエアーバーナによる燃焼器の小型化に関する数値解析(熱工学,内燃機関,動力など)

抄録

Miniaturization of combustor is one of the important development subjects for high-performance and high-power combustion equipment. We had examined the center-air burner consisted of three concentric tubes, in which air flows in both inner (central) and outer tube and fuel flows in the annulus between these air tubes. In this burner, fuel and oxidizer are mixed more efficiently than normal burner consisted of two concentric tube. We expect that the combustor using center-air burner achieves more highly loaded combustion and overcomes unavoidable technical problems of miniaturization of combustor: combustion efficiency reduction and incomplete combustion degradation. In this study, we carried out the numerical calculation of center-air burner by using detailed chemical kinetics, and examined the effects of preheating temperature and ejection velocity of center-air on combustion efficiency, combustion intensity and emission index of CO. Then, it is found that the use of the center-air burner is very effective way to miniaturize the combustor.