Experimental study on mixing characteristics of flexible-blade Rushton impeller

YANG Fengling; ZHANG Cuixun; LI Meiting

doi:10.11949/0438-1157.20190961

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Experimental study on mixing characteristics of flexible-blade Rushton impeller

Fluid dynamics and transport phenomena | 更新时间：2026-07-24

- Experimental study on mixing characteristics of flexible-blade Rushton impeller
- CIESC Journal Vol. 71, Issue 2, Pages: 626-632(2020)
- 作者机构：
  
  1. 山东大学机械工程学院，山东济南 250061
  2. 高效洁净机械制造教育部重点实验室(山东大学)，山东济南 250061
  3. 山东大学机械工程国家级实验教学示范中心，山东济南 250061
  4. 山东天力能源股份有限公司，山东济南 250100
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190961
  CLC： TQ 027
- Received：21 August 2019，
  
  Revised：2019-12-25，
  
  Online First：14 August 2020，
  
  Published：05 February 2020
- 稿件说明：
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杨锋苓, 张翠勋, 李美婷. 柔性Rushton搅拌桨混合性能的实验研究[J]. 化工学报, 2020, 71(2): 626-632

YANG Fengling, ZHANG Cuixun, LI Meiting. Experimental study on mixing characteristics of flexible-blade Rushton impeller[J]. CIESC Journal, 2020, 71(2): 626-632
杨锋苓, 张翠勋, 李美婷. 柔性Rushton搅拌桨混合性能的实验研究[J]. 化工学报, 2020, 71(2): 626-632 DOI： 10.11949/0438-1157.20190961.

YANG Fengling, ZHANG Cuixun, LI Meiting. Experimental study on mixing characteristics of flexible-blade Rushton impeller[J]. CIESC Journal, 2020, 71(2): 626-632 DOI： 10.11949/0438-1157.20190961.

摘要

提高混合效率是流体搅拌混合领域的重点研究内容之一。几十年来，人们在开发新型搅拌桨及研发流体混合新技术方面做了大量工作。基于刚性Rushton桨，开发了一种柔性叶片Rushton搅拌桨，并以罗丹明6G为荧光剂，采用平面激光诱导荧光法对介质为水时该桨在湍流状态下的混合性能进行了实验测试研究。结果发现，标定实验结果表明，荧光剂强度与浓度呈线性关系，可以此为基准衡量同等实验条件下的宏观混合时间。荧光剂的扩散情况表明，与刚性桨相比，柔性桨具有更好的混合性能，尤其在混合的初始阶段，混合均匀程度及混合速度均有一定的优势。与刚性桨混合时间的对比表明，柔性桨的宏观混合时间较短，有助于提高流体混合效率。研究结果为该桨的工业应用奠定了基础。

Abstract

Rapid mixing is the key factor to efficient operation of many industrial devices involving fluid flow. During the past several decades

extensive contributions have been made to improve the mixing effect and efficiency either by modifying and developing new types of impellers

or by employing and developing new fluid mixing techniques. In this paper

the turbulent mixing characteristics of the flexible-blade Rushton impeller developed by ourselves were experimentally studied by the planar laser induced fluorescence (PLIF) technique. Roddinmin 6G was used as fluorescer. The agitated fluid was water. Result of the calibration experiment shows that the fluorescer luminosities are linear with their concentration

which can be used as a benchmark to measure the mixing time under the same experimental conditions. Diffusion processes of fluorescer show that flexible-blade Rushton impeller has better mixing performance than the standard Rushton impeller. It can improve the mixing uniformity and increase the mixing speed

especially at the initial stage of the mixing process. By comparison with standard Rushton impeller

it was found that mixing time of flexible-blade Rushton impeller is shorter

which is helpful to improve the fluid mixing efficiency. Results of this work lay a solid foundation for the industrial application of this impeller.

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references

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