Optimization of the Bending Pipe Swirling Device and the Wear Reduction Effect Based on the CFD-DEM Coupling Model

SONG Haihao; XU Xuemeng; SHANG Kun; ZHANG Hanshan; LI Bingxian; JIA Huimei

doi:10.19554/j.cnki.1001-3563.2025.13.021

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (13) : 186-196. DOI: 10.19554/j.cnki.1001-3563.2025.13.021

Automatic and Intelligent Technology

Optimization of the Bending Pipe Swirling Device and the Wear Reduction Effect Based on the CFD-DEM Coupling Model

SONG Haihao¹, XU Xuemeng^1,*, SHANG Kun¹, ZHANG Hanshan¹, LI Bingxian¹, JIA Huimei¹

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Abstract

The work aims to reduce the wear of the bending pipe by optimizing the structure of the bending pipe in the pneumatic conveying system. A swirling device was installed at the tangential position of the wear center of the bending pipe to transform the axial flow delivery in the bending pipe into a swirling flow delivery. The angle between the main pipe axis and the center axis of the swirling device was 55°, maintaining an airflow velocity in the bending pipe of 20 m/s. Through CFD-DEM, the flow field characteristics of wheat particles were compared at airflow velocities of 20, 30, and 40 m/s in the swirling device. Based on CFD-DEM, the motion simulation of particles in the bending pipe was conducted, comparing static pressure, trajectory diagrams, swirl intensity, particle distribution charts, etc., of the two devices. It was found that the static pressure of the guide blade type and the swirl intensity were both greater than that of the swirling pipeline type, indicating a superior spiral effect. An experimental platform was established for validation, and the experimental results were consistent with the simulation results. The guide blade type is more suitable for conveying in bending pipes, showing a significant vortex effect, with particles distributed evenly in the bending pipe and moving in a spiral manner, which can more effectively reduce the wear between the bending pipes and particles.

Key words

grain particles / swirl conveying / wear of bending pipe / CFD-DEM

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SONG Haihao, XU Xuemeng, SHANG Kun, ZHANG Hanshan, LI Bingxian, JIA Huimei. Optimization of the Bending Pipe Swirling Device and the Wear Reduction Effect Based on the CFD-DEM Coupling Model[J]. Packaging Engineering. 2025, 46(13): 186-196 https://doi.org/10.19554/j.cnki.1001-3563.2025.13.021

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