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Experimental study of the ignition delay of diesel/biodiesel blends using a shock tube

Hoang, V.N. and Thi, L.D. (2015) Experimental study of the ignition delay of diesel/biodiesel blends using a shock tube. Biosystems Engineering, 134. pp. 1-7. ISSN 15375110

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Abstract

Ignition delays of a pure biodiesel, which is produced from palm oil, as well as its blends with petroleum diesel were experimentally quantified using a preheated shock tube. The emission of OH* radical signals, which was observed by a photomultiplier via a monochromator, was used to identify the time for onset of ignition. Experiments were performed behind the reflected shock waves at a pressure of 0.12MPa, equivalence ratios of 0.5, 1.0 and 1.5, and a range of temperatures from 1174 to 1685K. Fuel blends B0, B20, B40, B60, B80 and B100 (corresponding to 0, 20, 40, 60, 80 and 100vol% of biodiesel with petroleum diesel, respectively) were tested. The results show that ignition delay variations of blends versus temperature were similar to those of pure diesel fuel. It was consistently found that for all fuel blends, ignition delay increases with an increase in equivalence ratio. An equivalence ratio exponent of 0.73 in Arrhenius correlation was observed. At a constant equivalence ratio, the effect of biodiesel fraction on chemical ignition delay of the fuel blends was not significant. The overall activation energy of diesel/biodiesel mixtures in this study is 161,937.5Jmol-1. © 2015 IAgrE.

Item Type: Article
Divisions: Faculties > Faculty of Vehicle and Energy Engineering
Identification Number: 10.1016/j.biosystemseng.2015.03.009
Uncontrolled Keywords: Activation energy; Biodiesel; Diesel fuels; Fuels; Ignition; Oil wells; Palm oil; Shock waves; Tubes (components); Arrhenius correlation; Chemical ignitions; Diesel; Equivalence ratios; Fuel blends; Ignition delays; Petroleum diesel; Reflected shock waves; Shock tubes
Additional Information: Language of original document: English.
URI: http://eprints.lqdtu.edu.vn/id/eprint/9919

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