电容式两相流层析成象系统仿真研究

Emulation of Electrical Capacitance Tomography System for Imaging of Two Phase Flows

以油料在管道中输送为例进行电容层析成象仿真。利用有限元方法对电场建立数学模型，在ＳＧＩｉｎｄｉｇｏ２工作站上，使用ＡＶＳ可视化软件和反投影算法，对３种典型流态模型反演及显示其流体成份分布的图象。

Electrical capacitance tomography(ECT) provides a new way for imaging the crosssection of process pipelines and vessels containing components with different permittivities.This paper describes an emulation method used for two component flow imaging.When the 1 dielectric distribution of the flow pattern is given,the capacitance between any two electrodes of the transducercan be calculated through a finite element method(FEM).Then the reconstructed imaging can be gained with the contribution of Application Visualization System and back project algorithm.Finally,three typical two phase flow regimes ,which encountered in practice,are reconstructed on a workstation SGI indigo 2.