Comparison of ultrasonic attenuation model in mid-wavelength region for droplet measurement

Abstract

Ultrasonic attenuation model is a very important theoretical basis for the measurement of droplet radius and volume fraction by ultrasonic attenuation method. The accuracy of measurement results depends on the rationality of model selection. In this paper, the measurement of droplet in the mid-wavelength region is studied. The BLBL (Bouguer-Lambert-Beer-Law) model, the superposition model of McClements model and BLBL model and the superposition model of H&T (Harker & Temple) coupled phase model and BLBL model are taken as theoretical models of ultrasonic attenuation method. Based on COMSOL simulation, the measurement effects of the three models are compared. By comparing the errors between simulation settings and inversion results obtained by these models, the superposition model of the McClements model and BLBL model is the best of the three models. The error of inverse particle radius is within 10.1%, and the error of inverse volume fraction is within 6.54%. Therefore, the superposition model of the McClements model and BLBL model is the most suitable of the three models for the measurement of large droplets in the mid-wavelength region.