基于流固耦合的超声污垢检测数值模拟
发布时间：2019-03-08 12:21
【摘要】：基于Comsol Multipysics仿真软件,建立了声发射耦合的板材-污垢多层有限元模型。以弹性动力学和压力声学为理论基础,推导了薄平板型试样在平面波辐射下的声波振动控制方程,研究了流相与固相区域超声传播特性规律,实现了二维平板污垢纵、横波分离的弹性数值模拟,通过分离后的波场提取,对薄层平板沉积污垢厚度进行高精度检测。数值模拟结果表明:流相区域服从微小声波波动方程传播规律,固相区域也能很好的实现弹性纵横波的完全分离提取;超声波对薄层平板沉积污垢的检测误差在5%以内,证明了数值模拟的可行性与准确性,对于实际换热系统的运行和清污具有很好的指导作用。
[Abstract]:Based on Comsol Multipysics simulation software, an acoustic emission coupled plate-fouling multi-layer finite element model is established. Based on the theory of elastic dynamics and pressure acoustics, the acoustic vibration control equations of thin plate specimens under plane wave radiation are derived. The characteristics of ultrasonic propagation in fluid and solid regions are studied, and the two-dimensional plate fouling longitudinal is realized. The elastic numerical simulation of shear wave separation is used to detect the thickness of sediment dirt on thin plate with high precision by extracting the separated wave field. The numerical simulation results show that the flow region obeys the propagation law of the micro acoustic wave equation, and the solid phase region can also realize the complete separation and extraction of elastic longitudinal and transverse waves. The detection error of ultrasonic wave on thin plate deposition is less than 5%, which proves the feasibility and accuracy of numerical simulation, and has a good guiding effect on the operation and cleaning of the actual heat transfer system.
【作者单位】： 东北电力大学自动化工程学院;
【基金】：国家自然科学基金项目(51176028)资助~~
【分类号】：O353.4;TB559
，
本文编号：2436801
[Abstract]:Based on Comsol Multipysics simulation software, an acoustic emission coupled plate-fouling multi-layer finite element model is established. Based on the theory of elastic dynamics and pressure acoustics, the acoustic vibration control equations of thin plate specimens under plane wave radiation are derived. The characteristics of ultrasonic propagation in fluid and solid regions are studied, and the two-dimensional plate fouling longitudinal is realized. The elastic numerical simulation of shear wave separation is used to detect the thickness of sediment dirt on thin plate with high precision by extracting the separated wave field. The numerical simulation results show that the flow region obeys the propagation law of the micro acoustic wave equation, and the solid phase region can also realize the complete separation and extraction of elastic longitudinal and transverse waves. The detection error of ultrasonic wave on thin plate deposition is less than 5%, which proves the feasibility and accuracy of numerical simulation, and has a good guiding effect on the operation and cleaning of the actual heat transfer system.
【作者单位】： 东北电力大学自动化工程学院;
【基金】：国家自然科学基金项目(51176028)资助~~
【分类号】：O353.4;TB559
，
本文编号：2436801
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