Dynamics and morphology of colliding spherical flames

Sheng Yang, Swetaprovo Chaudhuri, Delin Zhu, Chung K. Law

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A preliminary experimental and computational study was conducted on the dynamics and flame morphology of two identical colliding spherical flames. Experimentally, premixtures of fuel (C2H6, C3H8) and air are ignited by two synchronized sparks in a closed chamber under atmospheric pressure, with the subsequent flame front evolution tracked by a Schlieren system with high-speed camera. The images yield three distinctive stages during collision, namely: independent propagation, interface flattening and corner dynamics. The evolution of the total surface area and flame distortion is evaluated. Results show that the Lewis number dependence of the flame propagation speed at the corner is opposite to that expected of the thermal-diffusional effect, thereby demonstrating that Huygens' propagation dominates over the effects of stretch-affected preferential diffusion. Simulation shows that the flow field is largely distorted around the flame corner, causing pressure redistribution and vorticity generation through the baroclinic force across the flame.

Original languageEnglish (US)
Title of host publicationFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013
PublisherCombustion Institute
Pages143-148
Number of pages6
ISBN (Electronic)9781629937199
StatePublished - Jan 1 2013
EventFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013 - Clemson, United States
Duration: Oct 13 2013Oct 16 2013

Publication series

NameFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013

Other

OtherFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013
CountryUnited States
CityClemson
Period10/13/1310/16/13

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry

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  • Cite this

    Yang, S., Chaudhuri, S., Zhu, D., & Law, C. K. (2013). Dynamics and morphology of colliding spherical flames. In Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2013 (pp. 143-148). (Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2013). Combustion Institute.