封闭腔体内水和钠钾合金热驱动换热数值分析  

NUMERICAL ANALYSIS ON THERMALLY DRIVING HEAT TRANSFER OF H_2O AND Na-K IN ROTATING CLOSED CYCLIC SMALL CHANNEL

作　　者：王宏大[1] 常海萍[1] 常国强[1] 

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《工程热物理学报》2008年第9期1564-1566,共3页Journal of Engineering Thermophysics

摘　　要：本文以一种涡轮叶片新型超级冷却技术机理为研究背景,用数值方法研究了以水和钠钾合金为热驱动介质的微小密闭通道的流动换热特性,分析了热流密度、冷气速度和转速对换热的影响规律。结果表明:在本文研究参数范围内,通道内两种热驱动介质的换热特性具有相同的变化规律;在相同工况条件下,采用钠钾合金为热驱动介质可以得到更好的热驱动换热效果。Based on the fundamental studies about a new turbine blade cooling technique,the numer- ical simulation was carried out for thermally driving heat transfer of H_2O and Na-K in the rotating closed channel.The influence factors are studied and some conductions are drawn:the thermally driving heat transfer is enhanced with the improvement of heat fluexs,cooling air speed and rotation speeds.The results of numberial calculation show that heat transfer efficiency of Na-K is better than that of H_2O in the same c...

关 键 词：换热 旋转 热驱动 钠钾合金 

分 类 号：TK124[动力工程及工程热物理—工程热物理]