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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v24.i4-6.160
pages 599-606

Equivalence Ratio Measurements in Vaporized Fuel Spray Using Laser Raman Scattering

S. Jin
Dept. of Mechanical Engineering Carnegie Mellon University Pittsburgh, PA
K. Park
Dept. of Mechanical Engineering Carnegie Mellon University Pittsburgh, PA
G. Kim
Clean Production Tech. Research Center, KITECH Ibjang-myun, Chonan-si, Korea

ABSTRAKT

Laser Raman scattering method has been applied to measure equivalence ratio of methane/air mixture in injected spray. We used high power KrF excimer laser(λ = 248 nm) and a high gain ICCD camera to capture low intensity Raman signal. Raman shifts and Raman cross-sections of H2, O2, N2, CO2, CH4 and C3H8 are measured precisely. Our results show an excellent agreement with other groups. Mole fraction measurement of O2 and N2 from air shows that O2:N2 = 0.206:0.794.
We used gas injector which is operated at 1 bar. Methane is used as a fuel. Spray region is 10×37 mm and this region is divided into 80 points. 100 Raman signals are obtained and ensemble averaged for each point, 3-d and contour plot of distribution of equivalence ratio is presented. Our measured results show that the equivalence ratio of methane/air mixture in methane-rich region is reasonable. However, more study is necessary for methane-lean region because background noise level is almost same as Raman intensity of methane.


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