基于超声衰减和声速动态监测石蜡的相变过程

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胡子健，苏明旭*，李俊峰

上海理工大学颗粒与两相流测量技术研究所，上海市动力工程多相流动与传热重点实验室，上海 200093

收稿日期:2018-11-27修回日期:2019-03-24出版日期:2019-12-22发布日期:2019-12-22
通讯作者:苏明旭

基金资助:国家自然科学基金项目

Dynamic monitoring of paraffin phase change process by ultrasonic attenuation and velocity

Zijian HU, Mingxu SU*, Junfeng LI

Institute of Particle and Two-phase Flow Measurement, Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Received:2018-11-27Revised:2019-03-24Online:2019-12-22Published:2019-12-22

摘要/Abstract

摘要： 为研究石蜡在相变过程中内部结构和状态的改变特性，用中心频率为5 MHz的脉冲式超声波动态测量石蜡的相变过程，采集并分析不同升降温速率下的声速和声衰减信号的变化规律，结果与差示扫描量热仪(DSC)测量的热力学性质比较，并拍摄石蜡溶解过程的图像为辅助，探讨了二者由于测量原理不同导致的差异和特点。结果表明，两种方法均得到约50℃的初凝点，且二者信号反映的相变规律一致，表明利用声衰减和声速能够较好的表征石蜡在相变过程中的声学特性。超声可能成为一种新的蜡化物性质原位测量手段。

引用本文

胡子健苏明旭李俊峰. 基于超声衰减和声速动态监测石蜡的相变过程[J]. 过程工程学报, 2019, 19(6): 1160-1166.
Zijian HU Mingxu SU Junfeng LI. Dynamic monitoring of paraffin phase change process by ultrasonic attenuation and velocity[J]. Chin. J. Process Eng., 2019, 19(6): 1160-1166.

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