针对现有液固体系中固相含量检测方法上的缺陷,研发了液固两相流声发射检测系统,并进行室内评价试验。利用自行编写的系统软件,在实验室条件下提取不同砂粒的浓度和粒度信息进行试验。结果表明,在粒度不变条件下,砂粒声发射信号的功率谱幅值随砂粒浓度增加而增加;在浓度不变条件下,砂粒声发射信号的功率谱幅值随砂粒粒径增加而减小。

The existing solid particle detection methods for the liquid-solid flow suffer from various degrees of defects. For this reason, the acoustic emission detection device for the liquid-solid two-phase flow is proposed and developed, and the indoor evaluation tests are carried out. Using the software developed by us, the information of sand concentration and size is extracted from tests under laboratory conditions. The results show that the power spectrum amplitude of the sand acoustic emission increases with the sand mass content under a fixed sand size, but decreases with the increase of the sand size under a fixed sand concentration.