Volume 15, Issue 4 (2015)                   Modares Mechanical Engineering 2015, 15(4): 112-122 | Back to browse issues page

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Naghizadeh M, Ghahremani A, Saidi M H. Numerical simulation of spray characteristics of bio-ethanol and its blend with gasoline in a direct injection combustion chamber. Modares Mechanical Engineering. 2015; 15 (4) :112-122
URL: http://journals.modares.ac.ir/article-15-6024-en.html
1- Graduate student of school of mechanical engineering
Abstract:   (3333 Views)
In this study, spray behavior of bio-ethanol as a regenerative fuel that reduces emissions such as NOX and CO is investigated in a combustion chamber and compared to its different blends with gasoline. For this purpose, microscopic and macroscopic spray characteristics and also evaporated fuel mass after the injection are modeled and investigated using Fire 2013. It is concluded by increasing bio-ethanol content in the fuel, evaporated fuel mass, spray cone angle, spray area and sauter mean diameter increases, however spray tip penetration remains roughly constant. Increase of injection pressure, decreases spray cone angle and suater mean diameter and increases evaporated fuel mass, spray area and spray tip penetration. If the energy content and time of injection of bio-ethanol and gasoline be equivalent the results vary significantly compared to previous cases. In this case bio-ethanol has a longer spray tip penetration and spray area, higher fuel mass evaporated and smaller spray cone angle and sauter mean diameter compared to gasoline. The increased spray tip penetration and spray area in this case may lead to piston impingement and bore wetting resulting increased hydrocarbon emissions and decreasing engine efficiency.
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Article Type: Research Article | Subject: Combustion
Received: 2014/11/19 | Accepted: 2015/02/7 | Published: 2015/02/25

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