Experimental and numerical study of installing a dune model in a 90° bend in the horizontal-vertical pneumatic conveying system--颗粒学报PARTICUOLOGY

Yang, Z., Yan, F., Tu, P., & Zhu, R. (2023). Experimental and numerical study of installing a dune model in a 90° bend in the horizontal-vertical pneumatic conveying system. Particuology, 79, 95-108. https://doi.org/10.1016/j.partic.2022.10.009

Experimental and numerical study of installing a dune model in a 90° bend in the horizontal-vertical pneumatic conveying system

Zhenyu Yang ^a, Fei Yan ^a *, Panpan Tu ^a, Rui Zhu ^b *

a School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212000, China
b School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212000, China

10.1016/j.partic.2022.10.009

Volume 79, August 2023, Pages 95-108

Received 21 September 2022, Accepted 16 October 2022, Available online 1 November 2022, Version of Record 24 January 2023.

E-mail: yanfei@just.edu.cn; zhurui@just.edu.cn

Highlights

Abstract

In the pneumatic conveying process, particles move to the bend under the influence of inertia to form a particle rope, which will cause serious wear between the particles and the pipe wall, and then the dune model is designed and installed in the 90° bend to reduce energy consumption and wear in this study. Firstly, the minimum pressure drop velocity of particles transported by different size dune models was obtained through experimental study. Then the energy saving mechanism of the dune model is studied by CFD-DEM coupling. The experimental results show that the installation of the dune model reduces the minimum pressure drop velocity. The numerical simulation results show that the number of collisions between the particles and the tube wall in the vertical tube decreases after the installation of the dune model, which reduces the energy loss. Moreover, the increasing of tail size of the dune model is beneficial to the diffusion and acceleration of the particles in the vertical tube.

Graphical abstract

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