紀要論文

超希薄エタノール水溶液を用いた燃焼特性に及ぼす旋回噴流乱れによる燃焼改善

COMBUSTION IMPROVEMENT FOR COMBUSTION CHARACTERISTICS BY USING LEAN ETHANOL AQUEOUS UNDER TURBULENCE ROTATION FLOW

jpn

24368083

https://doi.org/10.15002/00025280

法政大学大学院理工学研究科

法政大学大学院紀要. 理工学研究科編

63

1

5

2022-03-24

Version of Record

Recent years, global warming problem caused by exhaust gas has raised up concerns. As one of the alternative fuels of petroleum fuel and the renewable ethanol fuel is attracting attention. However, the flame speed and combustion efficiency of ethanol fuel is lower than gasoline fuel. Previous research studied the influence of the turbulence on ethanol aqueous combustion process, which is one of the methods to achieve the combustion improvement of ethanol aqueous combustion. In this study, in order to improve the flame speed of the ethanol aqueous, we investigated the effect of jet disturbance unit and the water addition rate of ethanol aqueous by the observation of flame behavior. The main conclusion are as follows:1) Turbulence is extremely effective to achieve ethanol aqueous combustion improvement near the lean flammability limit. 2) With the influence of ethanol concentration in the ethanol aqueous, the optimal turbulence condition of combustion improvement near the lean flammability limit exists. 3) The maximum flame speed increasing ratio is about 32% when jet turbulence device is used under the super lean combustion with ethanol aqueous. 4) When the two same jet turbulence units are installed, especially at the ethanol aqueous E60 in Equivalent ratio 0.54, the flame speed increases by up to 49% when using the jet turbulence unit 45 deg compared with the case of single jet turbulence unit 45 deg.

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