窒素ガス流と磁気力に駆動される空気の対流現象の解析

概要

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Recently, magnetic field gradients have been found to induce gas flow and promote combustion in diffusion flames. For example, when N_2 gas stream was injected into air toward a weaker magnetic field, it was accelerated and behaved like a jet stream. This phenomenon was explained qualitatively by a magnetic attractive force acting on paramagnetic oxygen gas. In this study, such a magnetically induced jet stream of N_2 gas was quantitatively analyzed. First, the magnetic body force acting on the gas flow and the governing equation of magnetic gas dynamics are presented. Using them, a numerical simulation was carried out for N_2-Air convective flow under a magnetic field gradient. Calculated results show that the jet flow is accelerated to 80 cm/sec when the initial N_2 gas velocity is 3.9 cm/sec and maximum magnetic induction is 1.5 T. Furthermore, calculation shows the existence of a convective air flow around the N_2 jet flow. The results of the present study show good agreement with the experimental results.
一般社団法人日本機械学会の論文
1997-03-25