Investigation into Droplet Size Distribution and Turbulent Mixing Enhancement Performance in a Lightnin Static Mixer

IF 3.9 3区 工程技术 Q2 ENGINEERING, CHEMICAL
Huibo Meng, Jiawei Zhang, Yanfang Yu*, Yanfeng Zhao, Deao Li, Kexin Xiang and Yi Ji, 
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引用次数: 0

Abstract

The CFD–PBM coupled model was utilized to investigate the liquid–liquid turbulent mixing and enhancement performance in a Lightnin static mixer (LSM). The droplet size distribution (DSD), Sauter mean diameter (d32), and mixing index of the LSM were studied. The effects of the length–diameter ratio (l/D0), gap-diameter ratio (G/D0), and arrangement were analyzed. The correlation among d32/D0, the Fanning friction factor (f), and the Weber number was established. The d32 and Poiseuille number calculated from simulation were in good agreement with experiments, and the d32 decreased by 93.52%. Meanwhile, the analysis of turbulent higher-order moments of DSD showed that the DSD in the L–R LSM with l/D0 = 1 was narrower than that in other static mixers. Gray relational analysis revealed that the addition of gaps in the LSM can improve distribution mixing performance with a lower pressure drop. The L–R LSM with l/D0 = 1 and G/D0 = 1 is recommended based on the enhancement factor and gray analysis.

Abstract Image

Lightnin静态混合器中液滴粒径分布及湍流混合增强性能的研究
采用CFD-PBM耦合模型研究了Lightnin静态混合器(LSM)内液-液湍流混合及增强性能。研究了LSM的液滴粒径分布(DSD)、Sauter平均直径(d32)和混合指数。分析了长径比(l/D0)、间隙直径比(G/D0)和排列方式对材料性能的影响。建立了d32/D0、范宁摩擦系数(f)和韦伯数之间的相关性。模拟计算的d32和泊泽维尔数与实验结果吻合较好,d32减小了93.52%。同时,对DSD的湍流高阶矩分析表明,l/D0 = 1的l - r混合器的DSD比其他静态混合器窄。灰色关联分析表明,在LSM中加入间隙可以在降低压降的情况下提高分配混合性能。基于增强因子和灰色分析,推荐l/D0 = 1和G/D0 = 1的l - r LSM。
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来源期刊
Industrial & Engineering Chemistry Research
Industrial & Engineering Chemistry Research 工程技术-工程:化工
CiteScore
7.40
自引率
7.10%
发文量
1467
审稿时长
2.8 months
期刊介绍: ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.
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