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过程工程学报 ›› 2022, Vol. 22 ›› Issue (9): 1213-1223.DOI: 10.12034/j.issn.1009-606X.221328

• 研究论文 • 上一篇    下一篇

机械搅拌驱动下三维空间混合效果实时测量及表征

苏俞真1,4， 李金蔓1， 李泽西2， 高帅2， 桑秀丽3*， 陈刚1*， 徐建新2,4*
  

  1. 1. 宜宾学院质量管理与检验检测学部，四川 宜宾 644000 2. 昆明理工大学复杂有色金属资源清洁利用国家重点实验室，云南 昆明 650093 3. 昆明理工大学创新发展研究院，云南 昆明 650093 4. 昆明理工大学冶金与能源工程学院，云南 昆明 650093
  • 收稿日期:2021-10-14 修回日期:2021-12-15 出版日期:2022-09-28 发布日期:2022-10-09
  • 通讯作者: 徐建新 jianxinxu@kust.edu.cn
  • 作者简介:苏俞真(1990-)，女，四川省安岳县人，硕士，助教，质量工程与管理专业，E-mail: 2017114013@yibinu.edu.cn；通讯联系人，徐建新， E-mail: jianxinxu@kust.edu.cn；桑秀丽，E-mail: xiulisang@kust.edu.cn；陈刚，E-mail: 2015116003@yibinu.edu.cn.
  • 基金资助:
    低温余热驱动直接接触式-间壁式耦合沸腾换热过程流场特性及强化传热机理

Real-time measurement and characterization of 3D mixing effect driven by mechanical stirring

Yuzhen SU1,4,  Jinman LI1,  Zexi LI2,  Shuai GAO2,  Xiuli SANG3*,  Gang CHEN1*,  Jianxin XU2,4*   

  1. 1. Faculty of Quality Management and Inspection & Quarantine, Yibin University, Yibin, Sichuan 644000, China 2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China 3. Institute of Innovation and Development, Kunming University of Science and Technology, Kunming, Yunnan 650093, China 4. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
  • Received:2021-10-14 Revised:2021-12-15 Online:2022-09-28 Published:2022-10-09
  • Contact: XU Jianxin jianxinxu@kust.edu.cn

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摘要： 为精确实时测量机械搅拌驱动下三维空间多相混合效果，提出了一种三维空间的混合效果精确测量方法，通过类比势能的概念，计算总体平均质量度量Q来表征混合效果，以克服颗粒重叠二维点集伪均匀性度量的片面性。对三维空间混合效果精确测量方法进行了实验验证，计算了总体平均质量度量Q，用以表征颗粒分布的均匀性；分析了电机转速与红色小球相对运动速度均值关系。结果表明，不同转速和变频对示踪颗粒相对运动速度变化有明显的影响；特别是对二维与三维混合均匀性进行了比较，二维的混合均匀度测量方法计算结果明显不够精准，存在较大偏差，比三维的平均偏差高75%，三维空间混合均匀度测量方法计算结果更能反映出真实的混合效果；比较了中心化偏差(CD)和可卷偏差(WD)两种常用的混合均匀性测量方法，CD和WD方法对混合均匀性的表征均存在失效的情况，进一步验证了本方法的可行性以及准确性。

关键词: 机械搅拌, 均匀性度量, 实时测量, 搅拌效果, 三维空间

Abstract: Mechanical stirring and mixing is one of the essential operation in the fields of food processing, construction, pharmaceuticals, metallurgy, paper making, etc. It has great economic value and application prospects. The mixing uniformity is an important index to measure the quality of mechanical mixing. The study of its mixing uniformity measurement and characterization is still one of the research hot spots in this field. In order to accurately measure the three-dimensional spatial multiphase mixing effect under mechanical stirring drive in real-time, a three-dimensional mixing effect accurate measurement method was proposed, and the overall average mass metric Q was calculated to characterize the mixing effect by analogy with the concept of potential energy, in order to overcome the one-sidedness of the pseudo-uniformity measure of the overlapping two-dimensional point set of particles. The accurate measurement method of three-dimensional spatial mixing effect was experimentally verified, and the overall average mass metric Q was calculated to characterize the uniformity of particle distribution. The relationship between the motor speed and the mean relative motion velocity of red spheres was analyzed, and the results showed that different rotational speeds and frequency conversions had significant effects on the relative motion velocity variation of tracer particles. In particular, the two-dimensional and three-dimensional mixing uniformity were compared in this work, and the two-dimensional mixing homogeneity measurement method was obviously not accurate enough, there was a large deviation, 75% higher than the average deviation of three-dimensional, three-dimensional spatial mixing homogeneity measurement method calculation results had better reflection of the real mixing effect. The two commonly used methods of mixing uniformity measurement, CD and WD, were compared with method of this work, and the characterization of mixing uniformity by CD and WD methods both failed. The feasibility as well as the accuracy of the method in this work was further verified.

Key words: Mechanical Stirring, uniformity measurement, real-time Measurement, stirring effect, 3D