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Clean Air: International Journal on Energy for a Clean Environment

ISSN for PRINT: 1561-4417

Institutional price:	$451.00
Issues per year:	4

Best Paper Award Selection - Editorial Board Site

2004, Volume5

107 pages

DOI: 10.1615/InterJEnerCleanEnv.v5.i2

Issue price - $108.00

EFFECT OF A MAGNETIC FIELD ON DIFFUSION FLAMES, CO₂ AND NO_x GAS STREAMS

Hidenori Tanaka
The National Defense Academy, Department of Applied Physics, 1-10-20, Hashirimizu, Yokosuka, 239 -8686 JAPAN

Atushi Saima
Department of Mechanical Engineering, College of Science and Technology, Nihon University, 1-8, Kanda Surugadai, Chiyodaku, Tokyo 101-8308, Japan

ABSTRACT

The pressure effect on diffusion flames, CO₂ gas flow, and diluted NO_x gas flow were investigated in a magnetic field. The flame deformation and the inclination of the flame axis were examined. Magnetic field strength was changed from 0 up to 10.35 × 10⁵ A/m. Experiments in the flame deformation were carried out at two positions in the field, and those of the inclination were carried out in the neighborhood of the pole edge. The deformation of flames of these gases and the inclination were attributed to paramagnetic (air) and diamagnetic properties (flame, CO₂ gas, and NO_x gas). At the inflection point of the flame axis, the inclination angle θ of the flame axis was decided by two forces, the magnetic force F_Hξ and the buoyant force F_B. Experimental results of the inclination of the flame axis showed good agreement with the theoretical analysis. The jet path of CO₂ gas was numerically investigated. The original path changed as the magnetic field was applied. The position of the peak of the velocity on the cross section of the jet shifted to the side of the small magnetic field strength. In the stream of NO_x, the path approached to the pole piece. These results were proposed as a cleaning technology in the handling of combustion gas and exhaust gas.