Propagation of premixed DME/air flames in low speed mixture flows in mesoscale tubes

H. L. Yang, H. Nakamura, D. Q. Zhao, K. Maruta

Research output: Contribution to conferencePaperpeer-review

Abstract

The propagation of premixed DME/air flame in low speed mixture flows in mesoscale half-open tubes was investigated experimentally. The horizontal tube and the vertical tubes open at the upper or lower end were examined. Three different flame modes were observed: stable propagating flame; weakly pulsating flame; and pulsating tulip-like flame. The pulsating tulip-like flames were plane symmetric and swinging along the plane. Based on these flame modes, three flame front evolution modes during propagation were classified. Generally, the stable propagating flame could be observed in all conditions, while the occurrence of other two flame modes depended on the experimental conditions. The regimes of flame front evolution modes were different with the tube directions. The pulsating flames may be caused by the interaction of flame and acoustic wave, i.e., pressure wave driven Rayleigh-Taylor instability. The thermal diffusive effect and flame-wall coupling may also play roles in the formation of the pulsating tulip-like flame.

Original languageEnglish
Publication statusPublished - 2009
Event7th Asia-Pacific Conference on Combustion, ASPACC 2009 - Taipei, Taiwan, Province of China
Duration: 2009 May 242009 May 27

Conference

Conference7th Asia-Pacific Conference on Combustion, ASPACC 2009
Country/TerritoryTaiwan, Province of China
CityTaipei
Period09/5/2409/5/27

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Chemical Engineering(all)

Fingerprint

Dive into the research topics of 'Propagation of premixed DME/air flames in low speed mixture flows in mesoscale tubes'. Together they form a unique fingerprint.

Cite this