自動車用100kW級セラミックガスタービンのためのタンデム型予蒸発予混合希薄燃焼器の設計とその特性評価

概要

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A prevaporization-premixing lean combustor (PPL-1) for a 100 kW automotive ceramic gas turbine has been developed to meet the Japanese emission standards for gasoline engine passenger cars without using an aftertreatment system. Our previous study reported that PPL-1 had the narrow range on flame stability compared with the required operation range of automotive use, because autoignition or flashback on prevaporization-premixing lean combustion occurred at primary excess-air-ratio of about 2. In this study, a tandem-type prevaporization-premixing lean combustor (TPPL-1) has been developed in order to prevent flashback/autoignition in prevaporization-premixing lean combustion. Air-flow pattern and spray evaporation in a prevaporization-premixing path of TPPL-1 were evaluated by CFD, and NOx, CO and HC emissions from TPPL-1 were measured with a combustor test rig. The results show that the flashback/autoignition in TPPL-1 does not occur at primary excess-air ratio of less than 1.5 and low emissions of TPPL-1 are the same as those of PPL-1.
社団法人日本ガスタービン学会の論文
1997-09-10