Abstract
A comparative experimental and numerical study is conducted to establish the significance of the use of single-component over multi-component representatives of biodiesel, diesel and their blend for predicting spray tip penetration. Methyl oleate and methyl laurate are used as single-component representative fuels for biodiesel. The pure components n-heptane, n-dodecane and n-tetradecane are used as single-component representative fuels for diesel. Methyl laurate is found to represent biodiesel of coconut, whereas methyl oleate is found to represent biodiesel having high percentage of long-chain fatty acid esters. The spray tip penetration of methyl oleate is found to be in good agreement with the measured spray tip penetration of karanja biodiesel. The spray tip penetration prediction of n-heptane fuel is closely following diesel spray tip penetration along with that of n-tetradecane and n-dodecane. The study suggests that the knowledge of the single-component representatives of biodiesel, diesel and their blend is sufficient to predict the spray tip penetration of the corresponding biodiesel, diesel and their blend under non-evaporating environment.
Highlights
The rise in the use of fossil fuel in the transportation sector has an adverse effect on the environment and human health
A comparative experimental and numerical study is conducted to establish the significance of singlecomponent representatives for biodiesel, diesel and their blend for predicting their spray tip penetration
The observed similarity in the spray tip penetration of biodiesel is due to the presence of methyl oleate in its fatty acid ester composition
Summary
The rise in the use of fossil fuel in the transportation sector has an adverse effect on the environment and human health. The similarity in atomization characteristics of commonly used biodiesel was attributed to the long-chain unsaturated fatty acid esters. The long-chain fatty acid esters such as methyl oleate may be responsible for the higher viscosity and larger SMD for the commonly used biodiesel than that of the diesel [15]. The observed similar atomization characteristics for commonly used biodiesel may be attributed to the similar fatty acid ester composition of biodiesel. Jiaqiang et al [21] numerically studied biodiesel combustion and emission characteristics in accordance with their fatty acid ester composition. The present investigation is an attempt to show that the observed spray tip penetration of biodiesel may be due to their pure fatty acid ester composition. The spray tip penetration prediction of single pure component and multi-component representatives is compared with biodiesel, diesel and their blend
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