Response of spherical diffusion flames under rotation with general Lewis numbers

S. W. Yoo, J. Qian, J. K. Bechtold, C. K. Law

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

The structure and extinction of diffusion flames generated by a porous spherical burner or a fuel droplet in response to rotational motion were investigated through perturbation analysis, with emphasis on the effects of non-unity Lewis numbers (Le) for both fuel and oxidizer. The analysis shows that the rotational motion induces a secondary flow that distorts the otherwise spherical flame into a pancake shape. The flame temperature is also affected, such that the flame becomes more susceptible to extinction either at the poles or the equator, depending on the combined effects of Lewis numbers, flame stretch through local flow non-uniformity and ambient oxidizer concentration. The results reported here will help guide planned microgravity experiments.

Original languageEnglish (US)
Pages (from-to)199-217
Number of pages19
JournalCombustion Theory and Modelling
Volume9
Issue number2
DOIs
StatePublished - May 2005

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Response of spherical diffusion flames under rotation with general Lewis numbers'. Together they form a unique fingerprint.

  • Cite this