水力旋流器中不对称流动结构的研究

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-04-22 DOI:10.1002/apj.3080
Jian-gang Wang, Yan Zheng, Hua-lin Wang, Zhi-shan Bai, Yang Qiu
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引用次数: 0

摘要

利用计算流体动力学(CFD)和粒子图像测速仪(PIV)对水力旋流器的流场进行了研究。采用折射率匹配法提高了 PIV 测量的精度。CFD 结果与 PIV 测量结果十分吻合。详细分析显示,速度分量存在明显的轴向不对称,径向速度分量也表现出明显的差异。比较水力旋流器不同部分的定量数据证实了这一观察结果。研究进一步发现,这种不对称可能主要归因于水力旋流器单入口处的次级漩涡。二次涡流叠加在一次流上,而不是单独存在,从入口附近向下螺旋状流向底流孔口。据推测,特定的边界效应和压力梯度在二次流的形成过程中起着关键作用。这一假设基于理论考虑和经验观察,表明这些因素对水力旋流器内的流动动力学有重大影响。从我们的测量方法中获得的见解以及对水力旋流器内二次流的进一步了解,不仅可以为同行研究人员提供宝贵的参考,而且还有可能为水力旋流器的设计和运行优化提供信息,从而提高效率和性能。
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Investigation of the asymmetric flow structure in a hydrocyclone

The flow field of a hydrocyclone was investigated using both computational fluid dynamics (CFD) and particle image velocimetry (PIV). A refractive index matching method was employed to improve the precision of the PIV measurements. The CFD results are in good agreement with PIV measurements. Detailed analysis reveals significant axial asymmetry in the velocity components, with the radial velocity component exhibiting notable disparities. This observation is supported by quantitative data comparing different sections of the hydrocyclone. It is further found that the asymmetry might be mainly attributed to the secondary vortexes with the single inlet of the hydrocyclone. And the secondary vortexes, superimposed on the primary flow rather than existing on its own, spiral downwards from near the inlet towards the underflow orifice. It is hypothesized that specific boundary effects and pressure gradients play a pivotal role in the formation of secondary flows. This assumption is grounded on both theoretical considerations and empirical observations, suggesting that these factors significantly influence the flow dynamics within the hydrocyclone. The insights gained from our measurement methodology and enhanced understanding of secondary flows within hydrocyclones are not only poised to serve as valuable references for fellow researchers but also have the potential to inform the design and operational optimization of hydrocyclones for improved efficiency and performance.

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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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