郑松林,胡子健,苏明旭

• 1:上海市动力工程多相流动与传热重点实验室，上海理工大学 能源与动力工程学院，上海 200093

摘要(Abstract)：

针对高岭土的絮凝沉淀过程的监测问题提出了一种超声方法。基于Epstein-Carhart-Allegra-Hawley （ECAH）理论模型并考虑颗粒不规则度修正，通过数值计算得出声衰减系数随体积分数、频率和粒度的变化关系，分析了不同物性参数的影响。利用超声换能器，对4种不同初始质量浓度高岭土颗粒絮凝沉淀过程进行超声信号测量、浑液面高度记录、工业相机拍摄和在线取样检测；分析了由浑液面高度和衰减系数变化得到的各沉淀阶段的持续时间和变化率；通过比较超声法获取体积分数参数与在线取样法结果，并结合沉淀原理进行讨论，表明超声法用于高岭土絮凝沉淀过程监测的可行性。

关键词(KeyWords)： 超声测量;声衰减;絮凝;浓度;沉淀

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（51776129）。

作者(Author): 郑松林,胡子健,苏明旭

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