RELAP5/MOD2和CATHARE两相临界流模型的评价

ASSESSMENT OF TWO-PHASE CRITICAL FLOW MODELS OF RELAN5/MOD2 AND CATHARE CODE

摘要: 分析和评价了2个程序中的两相临界流模型。指出RELAP5/MOD2在上游低欠热度或低含汽率条件下计算的临界流量偏低并不能反映几何尺寸(L/D)对临界流量的影响。CATHATE临界流模型较完善,它计算的临界流量与实验符合得很好。建议用非均匀热不平衡声速来修改RELAP5/MOD2的两相临界流判据,或者补充短喷管和孔板的临界流量实验关系式或实验数据,以改正RE-LAP5/MOD2的上述2个缺点。

Abstract: Two--phase critical flow models of two codes are analyzed and assessed. Under upstream low sub-cooling or low guality conditions,the critical mass flow is underperdicted by RELAP5/MOD2 code andit can not reflect the influence of geometry L / D on critical flow. The critical flow model in CATHAREcode is more sophisticated, and the calculated critical mass flow agrees well with experimental data.