潜热型功能热流体在微矩形槽道中的流动换热特性

摘要

将潜热型功能热流体加入到微矩形槽道中,并搭建实验台,对槽肋比分别为1∶1(1#槽道)和1∶2(2#槽道)的两个矩形微槽道内潜热型功能热流体的换热性能进行了实验研究.结果表明:雷诺数相同时,1#槽道质量浓度大时量纲壁面温度高,2#槽道质量浓度小时量纲壁面温度高,同时1#槽道质量浓度大时局部努谢尔数低,2#槽道质量浓度小时局部努谢尔数低,二者呈现了不同的特性;潜热型功能热流体沿着槽道长度方向的强化换热与潜热型功能热流体质量浓度及槽道结构有关,存在最佳的强化换热结构和浓度.%This paper studies the heat transfer characteristics of latent functionally thermal fluid flows in two micro rectangle channels with 1∶1 (1 #) and 1∶2 (2#) groove rib ratio.The research shows that under constant Reynolds number condition and at the certain position of channel,the higher concentration of suspensions correspond to the larger dimension wall temperature of 1 # channel,while the 2# channel is contrary.Under the same condition,the higher concentration of suspensions correspond to the lager local Nusselt number of 1 # channel,while the 2# channel is contrary.The heat transfer characteristics in flow length of latent functionally thermal fluid are related to the concentration of suspensions and the construction of the channel.The optimal concentration and construction exist.