Experimental studies on spin flames in mesoscale combustion

Bo Xu, Yiguang Ju

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

Abstract

Unsteady propagations of premixed flames in a mesoscale divergent channel were investigated experimentally. The impact of variable cross-section area and the flame-wall coupling on the flame transition between different regimes and the onset of flame instability was examined. A spinning wave with frequency ranged from 20 Hz to 150 Hz was observed and the results showed that the spin frequency was proportional to the flame speed. The wall temperature was controlled using cooling water or hot nitrogen and a transition from spinning wave to stable flame was observed, which proved that the spin was a result of the thermal coupling effect. The stable flame and spin flame could coexist within a bifurcation region caused by the thermal history effect of the wall. The critical flow rate for the onset of spinning wave highly depends on the equivalence ratio and but not the heating power.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
Pages7019-7023
Number of pages5
StatePublished - Jul 2 2007
Event45th AIAA Aerospace Sciences Meeting 2007 - Reno, NV, United States
Duration: Jan 8 2007Jan 11 2007

Publication series

NameCollection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
Volume10

Other

Other45th AIAA Aerospace Sciences Meeting 2007
CountryUnited States
CityReno, NV
Period1/8/071/11/07

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

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  • Cite this

    Xu, B., & Ju, Y. (2007). Experimental studies on spin flames in mesoscale combustion. In Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting (pp. 7019-7023). (Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting; Vol. 10).