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[가솔린엔진부문] 정적챔버내의 고압 가솔린 인젝터의 연료분무특성
권의용(Eui-Yong Kwon),조은성(Eunsung Cho),이성풍(Seong-Poong Lee),조남효(Nam-Hyo Cho) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_1
This work presents an investigation of aerodynamic characteristics of cold fuel spray injected from a high pressure hollow cone swirl injector into a constant volume chamber. Laser tomography visualization was used to interrogate the fuel and air mixing characteristics and the effect of chamber pressure and temperature increase was analysed. Preliminary results on spray patternation showed that mixing effect tends to increase with the increase of chamber gas density yielding a decrease of spray penetration and a well defined vortex structure. For the present experimental conditions, fuel injection pressure and chamber gas pressure appear as the dominant factors. which govern the transient mixing characteristics.
평면 LIF법을 이용한 층류 예혼합 프로판/공기 화염 내NO 농도 분포의 정량적 측정
임인건(InKeon Lim),이기철(Kichul Lee),김응서(Eung Seo Kim),남기중(Gi-Jung Nam),이성풍(Seong-Poong Lee) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_1
An experimental technique for 2-dimensional quantitative measurements of NO concentrations is presented by planar laser-induced fluorescence(PLIF). Various interferences such as Rayleigh scattering, O₂ and C atom fluorescences are minimized by filtering and careful choosing of the excitation-detection scheme. By point-by-point background correction, broadband O2 and pressure-broadened NO fluorescences are precisely eliminated even at high pressure, so that quantitative NO concentrations are successfully calibrated in laminar premixed C₃H_8/air burner flames and the constant-volume combustion chamber. In both cases, quick increasing of NO concentration is observed adjacent to the flame front.<br/>