Effect of direct-current electric field on flame propagation characteristics of premixed CH4/O2/N2 flames

被引：0

作者：

机构：

[1] Institute of Internal Combustion Engine, Xi'an Jiaotong University

来源：

Wu, X. | 1600年 / Xi'an Jiaotong University卷 / 47期

关键词：

Burning velocity; Direct-current electric field; Ionic wind; Premixed flame; Stability;

D O I：

10.7652/xjtuxb201307003

中图分类号：

学科分类号：

摘要：

In order to investigate the effects of a direct-current (DC) electric field and its polarity on flame propagation characteristics, an experiment investigation on the effects of positive and negative DC electric fields on the spherically expanding premixed CH4/O2/N2 flames was conducted at the stoichiometric fuel/air ratio and room temperature using schlieren photography. The experimental results show that when a DC electric field is applied, the flame front is stretched in the horizontal direction, and the stretched flame propagation speed, unstretched laminar burning velocity and Markstein length increase with an increase in voltage magnitude. The influence of negative electric fields on these characteristics is more effective than that of positive DC electric fields. When the input voltage of -5 kV and 5 kV is applied, the stretched flame propagation speed increases by 10.85% and 5.66%, and unstretched laminar burning velocity rises by 13.13% and 6.98%, respectively, compared with that of 0 kV. It seems that flame propagation and stability can be effectively enhanced by DC electric fields.

引用

页码：13 / 17

页数：4

共 13 条

[1]

Jaggers H.C., Engel A.V., The effect of electric fields on the burning velocity of various flames, Combust and Flame, 16, 3, pp. 275-285, (1971)

[2]

Marcum S.D., Ganguly B.N., Electric-field-induced flame speed modification, Combust and Flame, 143, 1-2, pp. 27-36, (2005)

[3]

Vandenboom J., Konnov A., Verhasselt A., Et al., The effect of a DC electric field on the laminar burning velocity of premixed methane/air flames, Proceedings of the Combustion Institute, 32, 1, pp. 1237-1244, (2009)

[4]

Hu J., Rivin B., Sher E., The effect of an electric field on the shape of co-flowing and candle type methane-air flames, Experimental Thermal and Fluid Science, 21, 1-3, pp. 124-133, (2000)

[5]

Calcote H.F., Pease R.N., Electrical properties of flames-burner flames in longitudinal electric fields, Industrial & Engineering Chemistry, 43, 12, pp. 2726-2731, (1951)

[6]

Won S.H., Ryu S.K., Kim M.K., Et al., Effect of electric fields on the propagation speed of tribrachial flames in coflow jets, Combust and Flame, 152, 4, pp. 496-506, (2008)

[7]

Bradley D., Hicks R.A., Lawes M., Et al., The measurement of laminar burning velocities and Markstein numbers for iso-octane-air and iso-octane-n-heptane-air mixtures at elevated temperatures and pressures in an explosion bomb, Combust and Flame, 115, 1-2, pp. 126-144, (1998)

[8]

(2011)

[9]

pp. 27-43, (2001)

[10]

Lawton J., Weinberg F.J., Electrical Aspects of Combustion, (1969)

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