Combustion in meso-scale vortex combustors: Experimental characterization

Ming Hsun Wu, Richard A. Yetter, Vigor Yang

研究成果: Paper

4 引文 斯高帕斯(Scopus)

摘要

The combustion characteristics of a series of mesoscale vortex combustors were experimentally studied. The combustors had combustion chamber volumes ranging from 10 to 108 mm3 and were fueled with hydrogen, methane, and liquid nitromethane. Both air and oxygen-enriched air were used as oxidizers. Analysis of the flame structure was obtained from photographic imaging. Stability limits of the combustor were investigated with temperature and OH* chemiluminescence measurements and/or from visual observation of the flame luminosity. Fourier transform infrared (FTIR) spectroscopy of the exhaust gases was performed for quantitative analysis of CO2, CO, and CH4 from which chemical efficiencies of the combustion process were obtained. For all combustion chamber sizes, hydrogen-air combustion was stabilized over a wide range of equivalence ratios and flow rates. Stable methane-air combustion was achieved at atmospheric pressure with only the largest combustion chamber; however, when the air was enriched with oxygen, combustion was stabilized in even the smallest combustor chamber. Depending upon the oxygen enrichment, equivalence ratio, and momentum of the inlet reactant jets, the flame structure was observed to change from a micro diffusion flame stabilized at the fuel jet exit to a spinning well mixed flame that engulfed the entire combustor volume. Under conditions where stable operation was achieved, chemical efficiencies ranged from approximately 85-97%. Direct wall injection of liquid nitromethane produced stable combustion at one atmosphere when a small amount of oxygen (6% by volume) was simultaneously injected. Increased combustion chamber pressures are predicted necessary to extend the operational limits and enable combustion of pure liquid nitromethane.

原文English
頁面12200-12209
頁數10
DOIs
出版狀態Published - 2004 一月 1
事件42nd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
持續時間: 2004 一月 52004 一月 8

Other

Other42nd AIAA Aerospace Sciences Meeting and Exhibit
國家United States
城市Reno, NV
期間04-01-0504-01-08

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Wu, M. H., Yetter, R. A., & Yang, V. (2004). Combustion in meso-scale vortex combustors: Experimental characterization. 12200-12209. 論文發表於 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States. https://doi.org/10.2514/6.2004-980