The effects of hydrogen addition on the auto-ignition delay of homogeneous primary reference fuel/air mixtures in a rapid compression machine

Hyunsoo An, Jinhwa Chung, Seunghyeon Lee, Soonho Song

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The ignition delay time with mixtures of primary reference fuels (PRFs) and hydrogen were measured using a rapid compression machine (RCM), where the concentration of hydrogen was systematically varied. The experiments were performed for compressed temperatures in the range 735-847 K. The fuel/air equivalence ratio was varied to investigate its effects on the ignition delay of n-heptane and iso-octane. Hydrogen was added with hydrogen-energy-share ratios in the range of 0-10%, meaning that the energy of the hydrogen replaced 0-10% of that of either n-heptane or iso-octane. When hydrogen was added to n-heptane, there was a significant increase in the ignition delay, especially during the first-stage reaction region. This was explained using the chemical kinetic analysis software package CHEMKIN PRO; hydrogen consumed radical species related to the ignition of hydrocarbon fuels. With iso-octane, there was a significant increase in the ignition delay not only in the fist-stage reaction region, but also in second-stage reaction region. The effects of the hydrogen concentration were found to depend on the equivalence ratio and temperature for both fuels.

Original languageEnglish
Pages (from-to)13994-14005
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume40
Issue number40
DOIs
Publication statusPublished - 2015 Oct 26

Fingerprint

spontaneous combustion
Ignition
Compaction
Hydrogen
ignition
air
hydrogen
Air
Heptane
octanes
heptanes
equivalence
hydrocarbon fuels
Reaction kinetics
Software packages
Time delay
reaction kinetics
time lag
Hydrocarbons
computer programs

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

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abstract = "The ignition delay time with mixtures of primary reference fuels (PRFs) and hydrogen were measured using a rapid compression machine (RCM), where the concentration of hydrogen was systematically varied. The experiments were performed for compressed temperatures in the range 735-847 K. The fuel/air equivalence ratio was varied to investigate its effects on the ignition delay of n-heptane and iso-octane. Hydrogen was added with hydrogen-energy-share ratios in the range of 0-10{\%}, meaning that the energy of the hydrogen replaced 0-10{\%} of that of either n-heptane or iso-octane. When hydrogen was added to n-heptane, there was a significant increase in the ignition delay, especially during the first-stage reaction region. This was explained using the chemical kinetic analysis software package CHEMKIN PRO; hydrogen consumed radical species related to the ignition of hydrocarbon fuels. With iso-octane, there was a significant increase in the ignition delay not only in the fist-stage reaction region, but also in second-stage reaction region. The effects of the hydrogen concentration were found to depend on the equivalence ratio and temperature for both fuels.",
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The effects of hydrogen addition on the auto-ignition delay of homogeneous primary reference fuel/air mixtures in a rapid compression machine. / An, Hyunsoo; Chung, Jinhwa; Lee, Seunghyeon; Song, Soonho.

In: International Journal of Hydrogen Energy, Vol. 40, No. 40, 26.10.2015, p. 13994-14005.

Research output: Contribution to journalArticle

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