异径管冲蚀失效的流固耦合数值模拟  

FLUID-STRUCTURE INTERACTIONAL NUMERICAL SIMULATION OF EROSION-CORROSION FAILURE OF REDUCER IN MULTIPHASE FLOW

作　　者：偶国富[1] 裘杰[1,2] 朱祖超[1] 王艳萍[1] 许根富 

机构地区：[1]浙江理工大学机械与自动控制学院,杭州310018 [2]杭州富如德科技有限公司,杭州310018 [3]哈尔滨空调股份有限公司研发中心,上海201901

出　　处：《力学学报》2010年第2期197-204,共8页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家自然科学基金(20576125);国家高技术研究发展计划(863计划)(2009AA04Z422);浙江省自然科学重点基金(Z4080352);浙江省重大科技专项(2009C11G2060031)资助项目~~

摘　　要：针对异径管的冲蚀失效问题,以管壁腐蚀产物保护膜为研究对象,主要研究流固耦合对管道冲蚀破坏的作用机理.建立流固耦合数理模型,推导出在任意拉格朗日-欧拉(Arbitrary Lagrange-Euler,ALE)描述下的黏性流体N-S方程和腐蚀产物保护膜固体区域的控制方程,分析管壁边界层多相流介质流动与腐蚀产物保护膜破损之间的耦合作用.以异径管冲蚀失效为例,运用多物理场耦合软件,分析了异径管流体流向、结构和规格对保护膜变形的影响,模拟结果表明:流向为"大进小出"的冲蚀较严重;偏心异径管比同心异径管冲蚀严重;两端管径差越大,冲蚀越严重.可为异径管的失效分析、优化设计和在役检验提供参考.In order to research the failure of reducer,we focused on the protective corrosion product film formed on the wall of reducer and investigated the mechanism of erosion-corrosion damage caused by interaction of corrosion and fluid.The mathematical model of fluid-structure interaction was established.N-S equation of viscosity liquid and control equation of solid area of corrosion products are postulated with Arbitrary Lagrange-Euler （ALE）.The interaction between multiphase liquid in boundary layer within pipe wall and the damage of protective erodent products film is analyzed.Applying with the Femlab software,the deformation of protective erodent products film in three different ways were analyzed,including different flows in reducer,different structures of reducer and different specifications of reducer.The numerical simulation result indicated that the deformation of protective erodent products film is relatively small,when the following conditions are satisfied, such as the fluid flows from the small inlet to large outlet,the concentric reducer and the relatively small difference of two end calibers of reducer.The obtained results can be used in erosion protecting and technical modification for the reducer.

关 键 词：异径管 冲蚀失效 腐蚀产物保护膜 流固耦合分析 变形量 

分 类 号：TB126[理学—工程力学] TE832[理学—力学]