化工学报 ›› 2014, Vol. 65 ›› Issue (3): 898-904.DOI: 10.3969/j.issn.0438-1157.2014.03.019

• 流体力学与传递现象 • 上一篇    下一篇

基于超声衰减谱和相速度的颗粒粒径测量

章维, 苏明旭, 蔡小舒   

  1. 上海理工大学颗粒与两相流测量研究所, 上海 200093
  • 收稿日期:2013-06-09 修回日期:2013-09-11 出版日期:2014-03-05 发布日期:2014-03-05
  • 通讯作者: 苏明旭
  • 作者简介:章维(1989—),男,硕士研究生。
  • 基金资助:

    国家自然科学基金面上项目(51176128, 51076106);上海市科委项目 (12ZZ142)。

Particle size distribution measurement based on ultrasonic attenuation and phase velocity spectra

ZHANG Wei, SU Mingxu, CAI Xiaoshu   

  1. Institute of Particle and Two-phase Flow Measurement, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2013-06-09 Revised:2013-09-11 Online:2014-03-05 Published:2014-03-05
  • Supported by:

    supported by the General Program of National Natural Science Foundation of China (51176128, 51076106) and the Shanghai Municipal Education Commission (12ZZ142).

摘要: 超声波在颗粒两相体系中传播,包含了大量颗粒粒径信息,结合理论模型,通过提取超声波有效衰减谱和相速度谱分析了颗粒的粒径分布。实验中,对体积分数为10%的3种不同粒径分布的聚苯乙烯-水悬浊液,通过双样法和插入取代法(单样法)分别获得宽带超声波衰减谱与相速度谱,以ECAH模型为理论基础,并分别用Twomey、ORT和Davidon-Fletcher-Powell优化算法,反演出悬浊液颗粒粒径分布。测量结果与显微镜图像法结果进行对比,中位径误差小于15%,表明了利用超声波衰减谱法(UASA)和相速度谱法(UPVSA)测量悬浊液颗粒粒径分布的可行性与可靠性。

关键词: 超声波, 衰减谱, 相速度谱, 粒度分布, 模型, 测量

Abstract: Ultrasonic wave usually contain abundant particle size information when it passes through particulate two-phase flow. With the help of theoretical interpretation, particle size distribution (PSD) can be obtained by extracting effective attenuation and phase velocity spectra. Experiments were carried out to measure the particle size distribution of three kinds of aqueous polystyrene suspension samples with volume fraction of 10%. Attenuation and phase velocity spectra were acquired respectively by double-sample and insert-substitution methods. Furthermore, based on the ECAH model, the Twomey, ORT and an optimization method (Davidon-Fletcher-Powell algorithm) were used to inverse the particle size distribution of suspensions. The ultrasonic measurement results illustrated good consistence with those from microscope image analysis with deviation less than 15%, which indicated that measuring the particle size distribution of suspension with both ultrasonic attenuation and phase velocity spectra was feasible and reliable.

Key words: ultrasonic, attenuation spectrum, phase velocity spectrum, particle size distribution, model, measurement

中图分类号: