CFD simulation of power characteristics and flow field distribution of different spiral stirring paddles

IF 3.8 3区工程技术 Q3 ENERGY & FUELS Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-20 DOI:10.1016/j.cep.2024.110033

Qingzhao Liu , Xubin Zhang , Xiaohong Xiong , Fumin Wang , Guobing Li , Shuai Liu , Qi Shen , Zhiwei Zhang , Yang Qin , Bingxin Zhu , Zheng Wang

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Abstract

Stirred reactors are widely used in various industries, and the stirring paddle structure has a significant effect on its power consumption. Therefore, in this study, different spiral stirring paddles were investigated. The effects of the ratio of paddle length to leads (Ls/S) design values and number of blades on the power characteristics and internal flow field of the reactor are discussed in detail, and the correlation equation of power number (Np) concerning Re and Ls/S values is fitted. It was found that the Np of stirring paddles increased and then decreased as the Ls/S value increased, and the effect of the number of blades on the Np gradually reduced. When the Ls/S value is equal to 0.6, the high-speed region of the flow field is the largest and the mixing effect is the best. The conclusions obtained can provide a reference for the energy-saving optimal design of spiral stirring paddles.

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不同螺旋搅拌桨动力特性和流场分布的 CFD 仿真

搅拌反应器广泛应用于各行各业，而搅拌桨的结构对其功耗有很大影响。因此，本研究对不同的螺旋搅拌桨进行了研究。详细讨论了桨叶长径比（Ls/S）设计值和桨叶数量对反应器功率特性和内部流场的影响，并拟合了功率数（Np）与 Re 和 Ls/S 值的相关方程。结果发现，随着 Ls/S 值的增大，搅拌桨的 Np 先增大后减小，叶片数量对 Np 的影响逐渐减小。当 Ls/S 值等于 0.6 时，流场的高速区域最大，混合效果最好。所得结论可为螺旋搅拌桨的节能优化设计提供参考。

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来源期刊

Chemical Engineering and Processing - Process Intensification 工程技术-工程：化工

CiteScore

7.80

自引率

9.30%

发文量

408

审稿时长

49 days

期刊介绍： Chemical Engineering and Processing: Process Intensification is intended for practicing researchers in industry and academia, working in the field of Process Engineering and related to the subject of Process Intensification.Articles published in the Journal demonstrate how novel discoveries, developments and theories in the field of Process Engineering and in particular Process Intensification may be used for analysis and design of innovative equipment and processing methods with substantially improved sustainability, efficiency and environmental performance.