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:: Volume 16, Issue 16 (10-2009) ::
Vol.16 No. 16 pp. 36-42 Back to browse issues page
Modeling of Effect of Biodiesel Cetane Number, Density and Viscosity on Ignition Delay
B. Najafi
Abstract:   (20351 Views)
In this study, Cetane number of different blends of Biodiesel fuel produced from restaurant waste cooking oil (WCO) and Diesel fuel was measured using a standard CFR engine. The effect of Biodiesel fuel blends on ignition delay of a indirect injection diesel engine (M8/1 Lister) was investigated. Cylinder pressure versus crank angle by Kistler-6123 Piezoelectric transducer is measured. All the blends of fuel were tested under a fixed speed of 750 rpm and full load condition and the start of fuel injection at 21 degree of TDC. Ignition delay was obtained from the cylinder pressure curve and its derivatives method. Experimental results showed that with increasing biodiesel percentage in biodiesel/diesel blended fuel, cetane number increases from 57 for net Biodiesel up to 63 for net Diesel and ignition delay increases from 13.8 oCA to 8.83 oCA respectively. Cetane number was effectual in physical ignition delay however density and viscosity were effective in chemical ignition delay. For prediction of ignition delay, an experimental model on the basis of Cetane number, density and viscosity was used. A non-linear regression model by using SPSS 14 software was found between ignition delay cetane number, density and viscosity with R2=0.998 and the error less than 0.5 oCA .
Keywords: Alternative Fuels, Biodiesel, Cetane Number, Ignition Delay, Diesel Engine
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Najafi B. Modeling of Effect of Biodiesel Cetane Number, Density and Viscosity on Ignition Delay. JER. 2009; 16 (16) :36-42
URL: http://engineresearch.ir/article-1-237-en.html

Volume 16, Issue 16 (10-2009) Back to browse issues page
فصلنامه تحقیقات موتور The Journal of Engine Research
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