Thermophoretic Effects on Seeding Particles in LDV Measurements of Flames

C. J. Sung, C. K. Law

Research output: Contribution to journalArticle

87 Scopus citations

Abstract

The motion of LDV seeding particles under the influence of viscous and thermophoretic forces in the rapidly-accelerating, high-temperature-gradient flame environment was studied via the counterflow premixed twin-flame configuration. Results demonstrate that thermophoretic force can induce significant lag between the fluid and.particle velocities in the active preheat zone of a flame, and suggest that caution should be exercised when interpreting LDV data obtained in this region. A thermophoretic velocity correction to the LDV-determined velocity, with known experimental or computational temperature profile, is proposed. Additional considerations of LDV diagnostics and its determination of laminar flame speed are also presented.

Original languageEnglish (US)
Pages (from-to)119-132
Number of pages14
JournalCombustion science and technology
Volume99
Issue number1-3
DOIs
StatePublished - Aug 1 1994

All Science Journal Classification (ASJC) codes

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

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