1School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
In order to detect and analyze the number and size of particulate matter in liquid media, the characterization of standard spherical particles were investigated by the method of light-blockage related to geometric optics and Mie scattering theory, while the method of angle scattering and the image method were used to verify the consistency of the measurement. A system was established that could be available simultaneously for the three methods. To perform a calibration, the amplitudes of obtained light-blockage signal for standard particles with six different sizes were statistically averaged and fitted, which consequently provided a fitting formula to determine the measurement results of other particles. The results for two standard particles and a mixed particle system showed that the median diameters for particles with nominal value of both 15.0 μm and 63.6 μm yielded a deviation less than 2%, and the mixed particles were also well identified in size.