The spray characteristics of n-butane were analyzed numerically using KIVA-3V code and compared with those of diesel under the same boundary conditions. The transient behavior of hollow cone spray was calculated not only in a constant volume chamber under various ambient conditions, but also in a premixed compression ignition engine. The spray characteristics were evaluated in terms of spray tip penetration and droplet size distribution. Various atomization sub-models such as TAB, Wave breakup and Wave-KH (Kelvin-Helmholtz) model were implemented in the code and validated by comparison with experimental data.The results show that mixture formation for butane proceeds faster than diesel fuel primarily due to a higher evaporation rate caused by butane's higher diffusivity in air. Furthermore, in a premixed compression ignition engine, the mixture of butane becomes more homogeneous than diesel by the end of compression stroke.
Comparison of Spray Characteristics in Butane and Diesel Fuels by Numerical Analysis
Sae Technical Papers
International Fuels & Lubricants Meeting & Exposition ; 2000
16.10.2000
Aufsatz (Konferenz)
Englisch
Comparison of spray characteristics in butane and diesel fuels by numerical analysis
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