【摘要】 文章利用电阻层析成像技术进行了空隙率的静态测试,并将测试数据、COMSOL计算数据与MATLAB编程数据进行了比较。在验证了所编MATLAB程序的正确性后,将其应用于气液两相流空隙率测试。为了避免电阻层析成像技术在气液两相流空隙率测试中图像处理的难题,文中针对三种典型的气液两相流流型,建立了各自流型下的空隙率与截面平均电导率之间的函数关系。具体试验时,可将试验测试数据导入所编MATLAB程序中,得到截面平均电导率,并将此值代入对应流型下的空隙率与截面平均电导率之间的函数关系式中,进而得到空隙率值。该文提出的方法能够解决气液两相流空隙率测试的难点,具有较大的工程应用价值。更多还原

【Abstract】 The void fraction is measured by electrical resistance tomography technology and the data measured by experiment is compared with calculating data by COMSOL and simulating data by MATLAB.The MATLAB program is used to measure the void fraction of gas-liquid two-phase flow after it is proved true.The functional equation between void fraction and sectional average conductivity is established according to three different types of flow pattern in order to avoid the difficulity in image processing of gas-liquid two-phase flow.For one experiment,the measured data is imported into MATLAB program to obtain the value of sectional average conductivity and then plug the value of sectional average conductivity into the functional equation above,the value of void fraction is obtained.The method proposed in this paper can solve the problem in void fraction measurement of gas-liquid two-phase flow and is of great engineering value.更多还原