Experimental Studies of Magnetic Effect on Methane Laminar Combustion Characteristics

ABSTRACT Influence of magnetic fields on the properties of methane laminar combustion was investigated experimentally. A high downward gradient of the square of the magnetic flux density was applied on methane laminar diffusion flame. The flame surface temperature and NOX concentration were measured by high-precision testing instruments. The flame size was analyzed by specific image raster analysis software. The results show that with the magnetic field intensity increasing, the flame dimensionless length decreases while the dimensionless width and flame temperatures increase. The gradient magnetic field exerts a great effect on the production of thermal NOX in the flame region under 35 mm due to the oxygen paramagnetic force. Compared to one gradient magnetic field, the concentration of NOX at least decreases by up to 60% on average.

[1]  T. Aoki.  Radicals' Emissions and Butane Diffusion Flames Exposed to Upward-Decreasing Magnetic Fields , 1989 .

[2]  C. McEnally,et al.  Aromatic and Linear Hydrocarbon Concentration Measurements in a Non-Premixed Flame , 1996 .

[3]  C. Smith,et al.  The prediction of laminar jet diffusion flame sizes: Part II. Experimental verification , 1977 .

[4]  P. Sagaut,et al.  Magnetically induced flame flickering , 2011 .

[5]  D. Urban,et al.  Shapes of buoyant and nonbuoyant laminar jet diffusion flames , 1999 .

[6]  Kenji Amagai,et al.  Diffusion flames and their flickering motions related with Froude numbers under various gravity levels , 2000 .

[7]  The effect of magnetic field on a microgravity single droplet combustion , 2008 .

[8]  K. Harada,et al.  Effects of magnetic fields on flames and gas flow , 1987 .

[9]  John Baker,et al.  A study of the characteristics of slotted laminar jet diffusion flames in the presence of non-uniform magnetic fields , 2003 .

[10]  P. Gillon,et al.  Methane/Air-Lifted Flames in Magnetic Gradients , 2010 .

[11]  P. Gillon,et al.  Magnetic field influence on coflow laminar diffusion flames , 2010 .

[12]  Hiroshi Yamashita,et al.  Mechanism of magnetic field effect on OH density distribution in a methane–air premixed jet flame , 2005 .

[13]  E. Villermaux,et al.  On the Physics of Jet Diffusion Flames , 1992 .

[14]  K. Harada,et al.  Combustion processes under strong DC magnetic fields , 1985 .

[15]  Tamás Turányi,et al.  Uncertainty analysis of NO production during methane combustion , 2008 .

[16]  Nobuko I. Wakayama,et al.  Magnetic promotion of combustion in diffusion flames , 1993 .

[17]  T. Aoki.  Radical Emissions and Butane Diffusion Flames Exposed to Uniform Magnetic Fields Encircled by Magnetic Gradient Fields , 1990 .

[18]  S. Som,et al.  Effect of multistage combustion on NOx emissions in methane–air flames , 2007 .

[19]  Hiroshi Yamashita,et al.  Behavior and effect on NOx formation of OH radical in methane-air diffusion flame with steam addition , 2002 .

[20]  Manoj Kumar,et al.  Study the effect of magnetic field on gaseous flames using digital speckle pattern interferometry , 2014 .

[21]  M. Kumar,et al.  Experimental investigation of the effect of magnetic field on temperature and temperature profile of diffusion flame using circular grating Talbot interferometer , 2015 .

[22]  K. Kitagawa,et al.  Experimental and numerical analyses of magnetic effect on OH radical distribution in a hydrogen-oxygen diffusion flame , 2003 .

[23]  B. Sarh,et al.  Influence of a Horizontal Magnetic Field on a Co-Flow Methane/Air Diffusion Flame , 2008 .

[24]  G. Aydin,et al.  Mine ventilation air methane as a sustainable energy source , 2011 .

[25]  T. Aoki.  Radical Emissions and Anomalous Reverse Flames Appearing in Upward-Increasing Magnetic Fields , 1990 .

[26]  F. G. Roper.  The prediction of laminar jet diffusion flame sizes: Part I. Theoretical model , 1977 .

[27]  Manoj Kumar,et al.  Influence of Magnetic Field on Gaseous Flames using Digital Speckle Pattern Interferometry (DSPI) and Riesz Transform , 2014 .