Effects of equivalence ratio and blending ratio on the ignition delays of n-pentane/hydrogen mixtures under engine relevant pressure
In this work, new ignition delay times of n-pentane/hydrogen binary mixtures were measured at a pressure of 20 atm, equivalence ratios of 0.5, 1.0, and 2.0 using a shock tube. Literature Pentane Isomer model is found to well capture the ignition delay times of n-pentane/hydrogen mixtures under the c...
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Published in | Fuel (Guildford) Vol. 288; p. 119669 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Kidlington
Elsevier Ltd
15.03.2021
Elsevier BV |
Subjects | |
Online Access | Get full text |
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Summary: | In this work, new ignition delay times of n-pentane/hydrogen binary mixtures were measured at a pressure of 20 atm, equivalence ratios of 0.5, 1.0, and 2.0 using a shock tube. Literature Pentane Isomer model is found to well capture the ignition delay times of n-pentane/hydrogen mixtures under the current condition. Kinetic analyses are performed to interpret the equivalence ratio dependence for n-pentane/hydrogen blends and to understand the interplay chemistry between the two fuels. It is found that the ignition delay times of all the n-pentane/hydrogen mixtures in this study show the equivalence ratio dependence similar to pure n-pentane. The reaction pathway indicates that n-pentane reacts independently from the hydrogen after blending. Hydrogen addition only gives the moderate promotion on n-pentane ignition for small hydrogen proportions since the H radicals in the dual-fuel system were mostly supplied to the n-pentane H-abstractions and the oxidation chemistry hydrogen is inhibited after blending. |
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ISSN: | 0016-2361 1873-7153 |
DOI: | 10.1016/j.fuel.2020.119669 |