【摘要】 本文应用考虑浮升力的湍流标准Ｋ－ε模型和Ｐｒｔ经验修正式，对液钠空腔内非稳态热分层流动进行了全隐式数值计算，比较研究了一阶迎风、乘方（ＰＬＤＳ）、ＭＰＬ（ＶａｎＬｅｅｒ＇ｓ格式），二阶迎风（ＳＯＵＤＳ）、ＭＳＯＵ（单调二阶迎风）、ＯＵＩＣＫ，ＳＨＡＲＰ和三阶ＱＵＩＣＫ格式，数值计算以ＳＩＭＰＬＥＣ算法为基础．通过与实验的比较分析，结果表明：对液钠空腔内伴有热分层的回流流动的全隐式数值计算应采用高阶单调格式或ＱＵＩＣＫ系列格式，低阶格式无法预言其热分层现象；本文建议选用三阶ＱＵＩＣＫ格式．更多还原

【Abstract】 In this paper, the turbulence standard K-ε model and Prt corrected formulation are applied to simulate transient thermally stratified recirculation in a cavity filled with sodium.The numerical calculation is based on the complete-implicit time scheme and the SIMPLEC method. A comparison among several differencing schemes is presented, including FOU,PLDS, MPL, SOUDS, QUICK, MSOU, SHARP and the third order QUICK. It appears high-order-accuracy monotonic schemes or QUICK series is useful, and low-order-accuracy schemes are a failure. The third order QUICK is proposed by author.更多还原