垂直矩形微槽群内部相变换热的实验研究  

Experimental Study on the Phase-change Heat Transfer in Vertically Rectangular Micro-capillary Grooves

作　　者：端震[1] 赵孝保[2] 董庆[3] 

机构地区：[1]南京市锅炉压力容器监督检验所,江苏南京210002 [2]南京师范大学动力工程学院,江苏南京210042 [3]山东省科学院能源研究所,山东济南250014

出　　处：《南京师范大学学报（工程技术版）》2008年第2期32-35,共4页Journal of Nanjing Normal University(Engineering and Technology Edition)

基　　金：江苏省自然科学基金(2006222)资助项目

摘　　要：以无水乙醇和水为工质,对垂直带有微槽群的紫铜基板表面的相变换热的特征进行了实验研究.结果表明,微槽宽度越窄,深度越深且液位越高,微槽群板的蒸发换热能力越强;工质为蒸馏水,基板温度低于130℃时,其最大蒸发换热强度达到5.36×105W/m2,工质为无水乙醇,基板温度低于108℃时,其最大蒸发换热热流密度超过3.51×105W/m2.换热强度高于在光滑表面的池沸腾换热强度.Using distilled water and ethanol as the working fluid, an experimental investigation about the phase change heat transfer is performed on a vertical copper plate with rectangular micro-capillary grooves. Experimental results show that the evaporating heat transfer performance of the copper plate with micro-capillary grooves will enhance with the decrease of width in micro groove, the increase of depth in micro groove and the raise of liquid level in evaporator. The evaporating performance in micro-grooves keep the copper plate below 130℃ and 108℃ , reaches 5.36 × 10^5 W/m^2 , 3.51 ×10^5 W/m^2, respectively, when distilled water and ethanol are used as the working fluid. The heat transfer on the micro-groove surface is much enhanced compared to the pool nucleate boiling on a smooth surface.

关 键 词：微槽群 相变换热 最大热流密度 薄液层 

分 类 号：TK124[动力工程及工程热物理—工程热物理]