Ignition delay time measurements of primary reference fuel blends

Mohammed A. AlAbbad, Tamour Javed, Fethi KHALED, Jihad Badra, Aamir Farooq

Research output: Contribution to journalArticlepeer-review

88 Scopus citations


Ignition delay times of four different primary reference fuels (PRF), mixtures of n-heptane and iso-octane, were measured behind reflected shock waves in a high-pressure shock tube facility. The PRFs were formulated to match the RON of two high-octane gasolines (RON 95 and 91) and two prospective low-octane naphtha fuels (RON 80 and 70). Experiments were carried out over a wide range of temperatures (700–1200K), pressures (10, 20, and 40bar) and equivalence ratios (0.5 and 1). Kinetic modeling predictions from four chemical kinetic mechanisms are compared with the experimental data. Ignition delay correlations are developed to reproduce the measured ignition delay times. Brute force sensitivity analyses are carried out to identify reactions that affect ignition delay times at specific temperature, pressure and equivalence ratio. The large experimental data set provided in the current work will serve as a benchmark for the validation of chemical kinetic mechanisms of primary reference fuel blends.
Original languageEnglish (US)
Pages (from-to)205-216
Number of pages12
JournalCombustion and Flame
StatePublished - Feb 7 2017

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: We would like to acknowledge the funding support from Saudi Aramco under the FUELCOM program and by King Abdullah University of Science and Technology (KAUST).


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