CATHARE2V2.5程序闪蒸模型的评估和改进

Qualification and Improvement of CATHARE 2V2.5 Flashing Model with Critical Flow Rate Experiments Data

利用BETHSY喷嘴和Super-Moby-Dick(SMD)喷嘴临界流试验数据对CATHARE2V2.5程序Rev.6.1和Rev.5两个版本中基本物理关系式模块的闪蒸模型进行了评估。评估结果表明,程序计算结果与试验数据吻合较好。其中,Rev.6.1的预测结果比Rev.5的结果更精确,尤其对于SMD喷嘴试验,Rev.6.1的计算结果与试验数据十分吻合,但对于BETHSY喷嘴试验,Rev.6.1的预测值偏高。然后,利用敏感性分析对闪蒸模型进行了局部改进。

In the paper, the qualification of flashing models of CATHARE 2 V2.5 revision 5 （Rev.5） and revision 6. 1（Rev.6.1） is carried out. The concerned critical flow rate experiments include BETHSY nozzle and Super-Moby-Dick （SMD） nozzle tests. The calculated results with Rev.6.1 and with Rev.5 are compared in the paper. On the whole, a good agreement can be shown using two revisions. The prediction of critical flow rate using Rev.6.1 is better than that using Rev.5. For SMD nozzle tests, the Rev. 6 results indicate a better agreement with the experimental data. But for BETHSY nozzle tests, the prediction of Rev.6.1 is over-estimated. The sensitivity study for improving the flashing model is also introduced in the paper.