Dynamic analysis of particles in vertical curved 90? bends of a horizontal-vertical pneumatic conveying system based on POD and wavelet transform

The pneumatic system is frequently operated in the high air velocity region, which aggravates the power consumption and erosion of bend, and the dynamic analysis of particles in bends with different radius of curvature in a horizontal-vertical pneumatic conveying system is necessary. This experimental study focuses on the particle motion characteristic of bend on the horizontal-vertical pneumatic conveying in terms of on pressure drop, particle velocity, power spectral characteristics of particle fluctuation veloc-ity, the energy distribution of the proper orthogonal decomposition (POD) modes, time coefficients of POD, and spatial mode of POD mode during flowing through bends. The results indicate that the particle rope is the large-scale motion of particles containing high energy, which dominates the motion of parti-cles in the bend, and the suppression of small-scale motion leads to the low pressure drop in a large radius ratio of the bend. (c) 2021 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

Automated summary

The experimental study focuses on the particle motion characteristic of bends in a horizontal-vertical pneumatic conveying system, highlighting the importance of particle rope as a large-scale motion affecting particle movement and the suppression of small-scale motion to reduce pressure drop.