气固管道流动中肋条防磨效率的数值研究  

NUMERICAL STUDY OF THE RIBBED-DUCT ANTI-EROSION EFFICIENCY IN GAS-SOLID FLOWS

作　　者：罗坤[1] 刘小云[1] 金军[1] 岑可法[1] 

机构地区：[1]能源洁净利用与环境工程教育部重点实验室浙江大学热能工程研究所,浙江杭州310027

出　　处：《中国电机工程学报》2004年第5期207-211,共5页Proceedings of the CSEE

基　　金：浙江省自然科学基金项目(502047,501161)

摘　　要：为了找到具有最高防磨效率的肋条,对三种加载了不同肋条的管道流动进行了研究。这些肋条分别具有正方形、等腰直角三角形和等腰三角形横截面,并且在管道中的布置以及别的几何尺寸都是相同的。气相流动的求解采用Fluent 6.0环境中的大涡模拟技术,而颗粒跟踪采用拉格朗日程序。结果表明在三种不同几何形状的肋条中,等腰直角三角形肋条具有最高的防磨效率。这对防止许多工程应用中出现的弯管磨损具有重要意义。In order to find out the ribs with the best anti-erosion efficiency, three different kinds of ribbed-duct flows are studied. These ribs have the square cross section, the isosceles right-angled triangle shape cross section and the isosceles triangle shape cross section respectively with the same arrangement and other geometry dimensions. The gas phase flow is solved by large eddy simuIation(LES) technique on Fluent 6.0 environment, whereas the particles are tracked by Lagrangian method. The results show that the isosceles right-angled triangle ribs have the highest anti-erosion ability among the three different kinds of ribs. It can be of significance to protect bends from erosion in many engineering applications.

关 键 词：大涡模拟 气固流动 防磨效率 管道 防磨效率 肋条 热能工程 

分 类 号：TK123[动力工程及工程热物理—工程热物理]