Flame speed and self-similar propagation of expanding turbulent premixed flames

Swetaprovo Chaudhuri, Fujia Wu, Delin Zhu, Chung King Law

Research output: Contribution to journalArticlepeer-review

137 Scopus citations


In this Letter we present turbulent flame speeds and their scaling from experimental measurements on constant-pressure, unity Lewis number expanding turbulent flames, propagating in nearly homogeneous isotropic turbulence in a dual-chamber, fan-stirred vessel. It is found that the normalized turbulent flame speed as a function of the average radius scales as a turbulent Reynolds number to the one-half power, where the average radius is the length scale and the thermal diffusivity is the transport property, thus showing self-similar propagation. Utilizing this dependence it is found that the turbulent flame speeds from the present expanding flames and those from the Bunsen geometry in the literature can be unified by a turbulent Reynolds number based on flame length scales using recent theoretical results obtained by spectral closure of the transformed G equation.

Original languageEnglish (US)
Article number044503
JournalPhysical review letters
Issue number4
StatePublished - Jan 27 2012

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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