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減圧によるナトリウム-水蒸気対向流拡散反応の可視化に関する数値解析研究

Numerical study on visualization of counterflow diffusion flame of sodium and water vapor in low-pressure condition

小原 義隆*; 山口 彰*; 高田 孝*; 大島 宏之

Kohara, Yoshitaka*; Yamaguchi, Akira*; Takata, Takashi*; Ohshima, Hiroyuki

ナトリウム-水反応における化学反応の定量化は反応場の温度や反応生成物濃度を評価するうえで重要である。ナトリウム-水蒸気の対向流拡散反応場の圧力,水蒸気の濃度,対向流速度をパラメータとした数値シミュレーションを行い、反応面の挙動を数値解析的に評価した。その結果、低圧力,低対向流速度条件により反応域が広がり、高解像度の可視化実験が可能という見通しを得た。

We have a plan to perform a fundamental experiment to investigate the mechanism of sodium-water chemical reaction. For help in setting the experimental conditions, a numerical simulation was performed for clarifying the effect of ambient gas pressure and water vapor concentration on the position and the region of the counterflow diffusion flame of sodium and water vapor. The result shows that the area of the diffusion flame is enlarged as the gas pressure is reduced and therefore low pressure condition is recommended to keep high accuracy of measurement.

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