Nonpremixed ignition of C7-C16 normal alkanes in stagnating liquid pool

Wei Liu, Jeremy A. Koch, Chung K. Law

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The nonpremixed ignition temperatures of n-decane, n-dodecane, and n-hexadecane were measured in a liquid pool by heated stagnating oxidizing flow at atmospheric pressure. Together with previous results on n-heptane, it is shown that, for the C7-C16 n-alkanes, the nonpremixed ignition temperature increases monotonically with increasing carbon number, and as such is contrary to the behavior of homogeneous ignition delays. Numerical simulation of the ignition events for n-heptane, n-decane and n-dodecane, employing a recently developed high temperature kinetic model, showed good agreement with the experimental results both qualitatively and quantitatively. Sensitivity and computational analyses indicate that the reason for the higher ignition temperature with increasing fuel molecular size is mostly due to their progressively reduced diffusivity, which leads to correspondingly reduced fuel concentration in the ignition kernel.

Original languageEnglish (US)
Pages (from-to)2145-2148
Number of pages4
JournalCombustion and Flame
Volume158
Issue number11
DOIs
StatePublished - Nov 1 2011

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Keywords

  • N-alkanes
  • Nonpremixed ignition
  • Stagnation flow

Fingerprint Dive into the research topics of 'Nonpremixed ignition of C<sub>7</sub>-C<sub>16</sub> normal alkanes in stagnating liquid pool'. Together they form a unique fingerprint.

  • Cite this