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( Satoshi Yamamura ),( Nobuaki Motegi ),( Mikiya Araki ),( Hideshi Yamada ),( Hisao Nakamura ),( Seiichi Shiga ) 한국액체미립화학회 2010 한국액체미립화학회 학술강연회 논문집 Vol.2010 No.-
Effects of the geometry of a jet engine fuel injector with wall impingement on the atomization and combustion characteristics are investigated. The atomization characteristics were evaluated by mean droplet size (SMD) obtained by a light scattering technique (LDSA) under atmospheric condition. Combination of pressure atomization with air-blasting gives remarkable improvement of the atomization. The effect of droplet size and spray dispersion on the combustion characteristics are also investigated experimentally. Results showed that SMD decreased with the decrease in the nozzle diameter D. Spray dispersion became better with the decrease in the D. EI(NOx) decreased with the decrease in the D. Spray dispersion became worse with the decrease in N. EI(NOx) decreased with the increase in N. The relationship between the rate of decrease in SMD and the rate of decrease in EI(NOx) was defined and was verified to be useful. According to the result of the effect of nozzle number N on the atomization and combustion characteristics, it is shown that the dispersion is more important than the atomization.