E207 ナトリウム-水反応および圧縮性混相流数値解析コードSERAPHIMの高度化 : 高度不足膨張噴流に対する解析手法の適用性検証(高速炉基盤技術,OS8 軽水炉・新型炉・核燃料サイクル)

概要

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Numerical analysis of highly underexpanded jets was performed by using the SERAPHIM program for compressible multi-phase flows with sodium-water chemical reaction to investigate its applicability. When the pressurized water leaks from a failed heat transfer tube in a steam generator of sodium cooled fast reactors, the underexpanded jet with the chemical reaction will be formed. The role of the SERAPHIM program is to predict the profiles of velocities, temperatures and concentrations under the sodium-water reaction accident. To achieve this, validation of the numerical method to the multi-phase flow including underexpanded jets must be conducted. A multi-fluid model considering compressibility and a second-order TVD scheme were used in the present analysis. In the case of the air jet into the air, numerical results agreed with the experimental data very well. Also in the case of the air jet into the water, the comparable numerical results were obtained by our method.
一般社団法人日本機械学会の論文
2009-06-28