ZU Xiaomeng， ZHU Shuguang

(Institute of Energy and Power Engineering, University of Nanjing for Science and Technology, Nanjing 210018， China)

Abstract: Based on the Monte Carlo method, the propagation of ultrasonic wave in concentrated gas-solid two-phase flow system was modeled. The results show that the changing law of ultrasonic attenuation coefficients with particle size of high concentration glass beads-air two-phase flow system with volume concentration of 63% at 40, 60, and 80 kHz are obtained by experiment. The correlation coefficient of the simulated result curve with the experimental curve can reach more than 0.99 by changing the value of Eloss, which proves that the treatment method of ultrasonic transmission, scattering and energy loss is suitable to the propagation law of high concentration gas-solid two-phase system. After the feasibility of the model has been proved, it is further calculated that the scattering attenuation of different particles sizes first increases and then decreases, with the increase of volume concentration. For the high concentration gas-solid two-phase system studied in the experiment, the scattering attenuation caused by multiple scattering process can be ignored compared with the total ultrasonic attenuation.

Keywords: ultrasonic attenuation； Monte Carlo method; gas-solid two-phase flow

中图分类号：O426

文献标志码：A

文章编号：1008-5548(2021)02-0074-08

DOI:10.13732/j.issn.1008-5548.2021.02.010

收稿日期： 2020-08-31， 修回日期：2020-09-24，在线出版时间：2020-12-22 15:57。

第一作者简介：祖晓萌(1994—)，女，硕士研究生，研究方向为非均匀气固两相介质衰减特性研究。E-mail：805589879@qq.com。

通信作者简介：朱曙光(1976—)，男，博士，副教授，硕士生导师，研究方向气固两相流测量。E-mail：zhushuguang@tsinghua.org.cn。