微、纳米TiO_2两相流体湍流换热效果的研究  

Research of micro and nano-TiO_2 two phase flow convective heat transfer effects in turbulence

作　　者：张勇健[1] 苍大强[1,2] 徐栋[1] 

机构地区：[1]北京科技大学冶金与生态工程学院 [2]生态与循环冶金教育部重点实验室

出　　处：《冶金能源》2011年第1期48-51,62,共5页Energy For Metallurgical Industry

摘　　要：研究了湍流条件下固-液两相流体对流换热系数的增加值。实验比较了纳米级和微米级颗粒对基液对流换热系数变化的影响,加入固体颗粒可以有效地改善流体的换热能力。实验结果发现纳米级颗粒悬浮液的对流换热系数提高较微米级颗粒悬浮液更为明显,对流换热系数随着管式加热炉温度的升高略有增大,同时探讨了纳米流体换热效果较好的原因。The convective heat transfer enhancement of solid-liquid two phase flow in turbulence was mainly investigated.The experiment compared the influence of nano-particles and micro-particles on convective heat transfer coefficient of base fluid and proved that addition solid particles could improve the fluid heat transfer effectively.The results showed compared with micro-particles suspension,nano-fluid could enhance the convective heat transfer more effectively,and which increase slightly with the temperature raised of tube furnace.The reason of nano-fluid better heat transfer also was discussed.

关 键 词：TiO2颗粒 两相流体 对流换热系数 流速 粒径 

分 类 号：TB383.1[一般工业技术—材料科学与工程]