TED-AJ03-185 EXPERIMENTAL STUDY OF MAGNETIC EFFECTS ON DIFFUSION FLAMES
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概要
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An external magnetic field is found to have a stabilizing effect and impose diffusion control on a propane-gas diffusion flame. The magnetic field strength was changed at 0∿11.38×(10)^5A/m at the center of the field. Experiments on the stabilizing effect and the diffusion control were carried out by a diffusion flame of propane gas. The propane gas and flame are diamagnetism, on the other hand, the air and oxygen gas are paramagnetism. Particularly, the volumetric susceptibility of the oxygen gas is a very large value. The magnetic pressure acting on the flames is attributed to paramagnetic and diamagnetic properties. An oscillating flame in the magnetic field changed to a stable flame with a low frequency and a small oscillating amplitude. The stabilizing effect was confirmed by schlieren, high-speed photography, spectrum and PDF of flame luminosity. The width of the outer region of combustion gas became narrower and kept a constant width when the magnetic field was applied. When the magnetic field was not applied in addition to that oxygen gas was injected coaxially from the outer nozzle as a secondary flow the flame length changed to an extremely short flame. On the other hand, when the magnetic field was applied to this short flame, the flame length increased with an increasing of magnetic field. This appears that the diffusivity of the oxygen gas can be controlled by the magnetic field. In this study, using the magnetic field reveals the stabilizing effect to the oscillating flame and the diffusion control of the oxygen gas. These effects can be explained using the pressure induced by magnetic field.
- 一般社団法人日本機械学会の論文
著者
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TANAKA Hidenori
Department of Applied Chemistry, Faculty of Engineering, Osaka University
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Kimura Motoaki
Dept. Of Mechanical Eng. Nihon University
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YOSHIDA Koji
Dept. of Mechanical Eng. Nihon University
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UEHARA Mitsugu
former Mitsubishi Material
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SAIMA Atsushi
Dept. of Mechanical Eng. Nihon University
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Tanaka Hidenori
Department Of Applied Physics National Defense Academy
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Tanaka Hidenori
Department Of Applied Chemistry Faculty Of Engineering Osaka University
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