Optimization of Side Air-supplying Velocity for Vortex Jet-type Swirl Generator in Bulk Grain Cyclonic Pneumatic Conveying

JIA Huimei; XU Xuemeng; XU Dongming; ZHANG Yongyu; LI Bingxian; ZHANG Hanshan

doi:10.19554/j.cnki.1001-3563.2026.05.013

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Packaging Engineering ›› 2026, Vol. 47 ›› Issue (5) : 109-118. DOI: 10.19554/j.cnki.1001-3563.2026.05.013

Optimization of Side Air-supplying Velocity for Vortex Jet-type Swirl Generator in Bulk Grain Cyclonic Pneumatic Conveying

JIA Huimei, XU Xuemeng^*, XU Dongming, ZHANG Yongyu, LI Bingxian, ZHANG Hanshan

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Abstract

The work aims to analyze the optimization analysis of the inlet velocity of the side air-supplying slot of Vortex Jet-Type swirl generators with wheat particles as the conveying object to solve the problems of high energy consumption, rapid cyclone attenuation, and particle deposition of existing devices in the cyclonic pneumatic conveying of bulk grain at China's ports. After establishing the model of the Vortex Jet-Type swirl generator using the 3D modeling software SolidWorks, the CFD-DEM coupling method was adopted to analyze the particle flow pattern, swirl number, and pressure drop characteristics in the pipeline within the inlet velocity range of 20-60 m/s for the side air-supplying slot. When the inlet velocity was 20-25 m/s, insufficient particle kinetic energy led to significant sedimentation; when the velocity was in the range of 50-60 m/s, excessive velocity impact caused particles to adhere to the pipe wall excessively, thereby resulting in pipe wall abrasion and particle breakage. However, when the inlet velocity of the side air-supplying slot was 30-45 m/s, the particle distribution was relatively uniform, the swirl number showed the smallest decrease amplitude, and at this point, the swirl generation was stable, with the pressure drop gradient and energy consumption in a balanced state. This study identifies the optimal inlet velocity range of the side air-supplying slot, providing data support for the structural optimization of bulk grain cyclonic pneumatic conveying devices and energy consumption control in long-distance conveying.

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pneumatic conveying / CFD-DEM coupling / vortex jet-type swirl generator / velocity optimization

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JIA Huimei, XU Xuemeng, XU Dongming, ZHANG Yongyu, LI Bingxian, ZHANG Hanshan. Optimization of Side Air-supplying Velocity for Vortex Jet-type Swirl Generator in Bulk Grain Cyclonic Pneumatic Conveying[J]. Packaging Engineering. 2026, 47(5): 109-118 https://doi.org/10.19554/j.cnki.1001-3563.2026.05.013

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