中国机械工程2017，Vol.28Issue(3)：340-348,9.DOI:10.3969/j.issn.1004-132X.2017.03.015
基于流固耦合的换热管道污垢超声回波检测数值模拟与实验
Numerical Simulation and Experiments of Fluid-solid Coupling-based Ultrasonic Echo Detection of Pipeline Fouling
摘要
Abstract
Analyses and discussion were provided on finite element modeling of heat exchange pipeline fouling and on the treatment of the coupling boundary.With pressure acoustics and solid mechanics as the theoretical basis,sound wave vibration control equations under plane wave source radiation were developed based on Comsol Multiphysics in PDE mode.Heat exchange pipes were nondestructively examined for their fouling thicknesses using ultrasonic echo technique,and the echo vibration mode and response time history were found for various vibration frequencies.The paper offers theoretical reference to the choice of mode and frequency in examining multi-layer pipes.With respect to the echo characteristics corresponding to the fouling thickness of sets of pipes made of various materials,a comparison was made with the results of the test points,which attested to the accuracy of this model.With heat exchange fouling dynamic simulation testing equipment,a quantitative testing study was performed on fouling.The results suggest:it is feasible to perform ultrasonic echo detection of heat exchange pipeline fouling by a method that combines testing and finite element technique,the numerical simulation is in agreement with the test results,and ultrasonic detection produces an error around ±4％ in examining pipeline fouling deposit.These results have practical significances to the operations and pipe cleaning of in-service heat gathering and transportation systems.关键词
换热管道污垢/流固耦合/超声回波/数值模拟/检测Key words
heat exchange pipeline fouling/fluid-solid coupling/ultrasonic echo/numerical simulation/detection分类
数理科学引用本文复制引用
孙灵芳,徐曼菲,朴亨,李霞..基于流固耦合的换热管道污垢超声回波检测数值模拟与实验[J].中国机械工程,2017,28(3):340-348,9.基金项目
国家自然科学基金资助项目(51176028) （51176028）
吉林省科技发展计划资助项目(20140204030SF) （20140204030SF）
