Measurement of fuel vapor concentration in flash boiling spray by infrared extinction/scattering technique |
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| Institution: | 1. Horiha, Ltd., Kyoto, Japan;2. Doshisha University, Kyoto, Japan;3. Sharp, Ltd., Nara. Japan;4. University of Wisconsin — Madison. Madison, WI 53706, USA;1. Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29631, USA;2. MO-SCI Corporation, 4040 HyPoint North, Rolla, MO 65401, USA;3. Department of Chemistry, Missouri University of Science and Technology, Rolla, MO 65409, USA;1. Università degli Studi di Perugia, Department of Engineering, Italy;2. Federal-Mogul Powertrain Italy a Tenneco Group Company, Italy;1. Department of Engineering Mechanics, College of Aerospace Engineering, Chongqing University, Chongqing 400044, China;2. State Key Laboratory of Coal Mine Disaster Dynamics and Control (Chongqing University), China;3. State Key Laboratory of Crystal Material (Shandong University), China;4. Chongqing Key Laboratory of Heterogeneous Material Mechanics (Chongqing University), China |
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| Abstract: | The MPI (multi-point injection) technique is widely used for gasoline engines due to its high responsiveness and high controllability. The pressure in the intake manifold becomes lower than the saturated vapor pressure of some components of gasoline in some operating conditions, and this causes the flash boiling phenomenon of the components. This phenomenon has great influence on spray atomization and vapor formation.In this study, the distribution of fuel vapor concentration of n-pentane was observed by applying the Infrared Extinction/Scattering method. The fuel vapor concentration can be calculated from the intensities of transmitted infrared light, under various spray conditions including the flash boiling spray. |
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