Experimental investigation of anodized/spray pyrolysed nanoporous structure on heat transfer augmentation  

作　　者：Kalaiselvam S. Gugan M.S. Kuraloviyan E. Meganathan R. NiruthiyaPriyan A. Swaminathan M.R. 

机构地区：[1]Department of Mechanical Engineering,Anna University Chennai

出　　处：《Journal of Thermal Science》2009年第4期358-363,共6页热科学学报（英文版）

摘　　要：This paper analyzes the effects of nanoporous surface on heat transfer temperaments of assorted thermal conductingmaterials. A phenomenal proposal of wielding the surface roughness to ameliorate the heat transfer ratehas been discovered. The maximum increase of heat transfer rate procured by nanoporous layers is 133.3% higherthan the polished bare metals of surface roughness 0.2μm. This plays an imperative role in designing compact refrigerationsystems, chemical and thermal power plants. Experimental results picture a formidable upswing of58.3% heat transfer in chemically etched metals of surface roughness 3 μm, 133.3% in nanoporous surface of porosity75-95 nm formed by electrochemical anodization, and porosity of 40-50 nm formed by spray pyrolysis increasesthe heat transfer by 130%. Effects of porosity, flow velocity and scaling on the energy transfer are alsoscrutinized. This paper also analyzes the multifarious modes of nanoporous fabrication, to contrive both prodigiousand provident system.

关 键 词：Nanoporous surface Heat transfer augmentation Electrochemical anodization Spray pyrolysis. 

分 类 号：TG174.451[金属学及工艺—金属表面处理] O484.1[金属学及工艺—金属学]