自動車用100kW級セラミックガスタービン燃焼器の特性 : その2 : 予蒸発予混合燃焼と噴霧燃焼のNOx排出特性

概要

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A lean premixed-prevaporization combustor (LPP combustor) for a 100kW automotive ceramic gas turbine has been developed to meet the Japanese 10-15 mode emission standards for gasoline engine passenger cars without using an aftertreatment system. The NOx, CO and HC emission characteris-tics measured with a combustor test rig were evaluated for kerosene in the inlet air temperature, the air pressure, the air velocity and the atomizing air. The NOx emission indices for the LPP combus-tion increase in an exponetial function as the inlet air temperature and the fuel-air ratio in the combustion chamber increases. The NOx emission indices increase in a linear function as the air velocity increases. The NOx emission indices increase as the air pressure increases, but the increase tendency changes at about 0.25 MPa. The change in NOx emission indices with pressure rise corresponds to those of the Sauter mean diameter and the non-evaporated mass fraction of fuel spray. The CO emission indices for the LPP combustion remain almost constant when the fuel-air ratios is about 0.02 or over. The reduced NOx. CO and HC from the LPP combustor can meet the target of emission levels at fuel-air ratios from 0.03 to 0.01.
社団法人日本ガスタービン学会の論文
1996-06-10