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Numerical simulation of effect of various parameters on atomization in an annular slit atomizer

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Abstract

As the width–thickness ratio of the discrete nozzle atomizer's discrete hole greatly influences the loss of atomizing gas flow rate, the discrete nozzle atomizer was transformed into an annular slit atomizer with the same total nozzle outlet area. A numerical simulation study on the effect of various parameters on the atomization in the annular slit atomizer was carried out by coupling both the large eddy simulation (LES) and volume of fluid (VOF) model, which is based on the applicability of LES in capturing the breakup behavior of transient liquid droplets and the advantage of VOF method in directly capturing the phase interface. The simulation results showed that the increase in the atomization pressure makes the gas gain higher momentum, while the increase in the nozzle intersection angle decreases the distance between the nozzle exit and the computational domain axis. The increase in these two variables results in enhancing the gas–liquid interaction in the primary atomization zone and the formation of more aluminum droplets simultaneously. It is considered that the atomization effect becomes better when atomization pressure is 2.5 MPa, and the nozzle intersection angle is 60°. Industrial tests showed that the aluminum powder prepared by the optimized annular slit atomizer has a finer mean particle size and a higher yield of fine powder. The numerical simulation results agree well with the industrial test data of the powder particle size.

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Acknowledgements

The authors would like to express their gratitude for the financial support provided by the National Natural Science Foundation of China (U21A20317) and gratitude to EditSprings (https://www.editsprings.cn) for the expert linguistic services provided. In addition, numerical calculation is supported by High-Performance Computing Center of Wuhan University of Science and Technology.

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Authors and Affiliations

  1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, China

    Yi Wang, Yi-chen Dang, Xiao-qing Chen, Bao Wang, Jian-an Zhou & Chang-yong Chen

  2. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, China

    Yi Wang, Yi-chen Dang, Xiao-qing Chen, Bao Wang, Jian-an Zhou & Chang-yong Chen

  3. School of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, China

    Zhong-qiu Liu

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  1. Yi Wang
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Wang, Y., Dang, Yc., Chen, Xq. et al. Numerical simulation of effect of various parameters on atomization in an annular slit atomizer. J. Iron Steel Res. Int. 30, 1128–1141 (2023). https://doi.org/10.1007/s42243-023-00943-3

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