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Multi-dimensional numerical benchmark analysis of SNL T3 sodium spray combustion experiment with AQUA-SF code

AQUA-SFを用いたSNL-T3ナトリウム燃焼実験多次元ベンチマーク解析

曽根原 正晃; 青柳 光裕; 内堀 昭寛; 高田 孝; 大島 宏之; Clark, A. J.*; Denman, M. R.*

Sonehara, Masateru; Aoyagi, Mitsuhiro; Uchibori, Akihiro; Takata, Takashi; Ohshima, Hiroyuki; Clark, A. J.*; Denman, M. R.*

日米国際協力CNWGの枠組みの一環として、Sandia National Laboratoriesと原子力機構の共同でSNL T3/T4試験をベンチマーク解析に用いて多次元解析コードAQUA-SFと質点系コードSPHINCSを利用し、ナトリウム燃焼の研究を進めている。本稿ではT3試験を使用し乱流効果や液滴輻射といった多次元効果の影響を明らかにするためにAQUA-SFの感度解析を行った。その結果、乱流効果や液滴輻射およびナトリウム液滴燃焼部の温度上昇がスプレイ燃焼率に大きく影響することが確認された。

In order to investigate the effect of sodium combustion, Sandia National Laboratories (SNL) and Japan Atomic Energy Agency (JAEA) have exchanged information of sodium combustion modelling and related experimental data in the framework of Civil Nuclear Energy Research and Development Working Group (CNWG). The benchmark analysis of the SNL T3 sodium spray combustion experiment and sensitivity study have been carried out using the AQUA-SF code in this paper. The sensitivity analysis clarifies the influencing factors of the multi-dimensional analysis such as turbulence models, radiation heat transfer model from sodium droplets, and momentum exchange between gas and droplets. The result shows that the turbulence effect, radiation from droplets and gas temperature increase at spray burning area affect sodium spray burning rate significantly.

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