Version 1
: Received: 2 July 2023 / Approved: 3 July 2023 / Online: 4 July 2023 (03:30:10 CEST)
How to cite:
Wang, Y. Ballast Pick-Up Velocity in the Vertical Pipe of an Excavating Machine Slurry System. Preprints2023, 2023070079. https://doi.org/10.20944/preprints202307.0079.v1
Wang, Y. Ballast Pick-Up Velocity in the Vertical Pipe of an Excavating Machine Slurry System. Preprints 2023, 2023070079. https://doi.org/10.20944/preprints202307.0079.v1
Wang, Y. Ballast Pick-Up Velocity in the Vertical Pipe of an Excavating Machine Slurry System. Preprints2023, 2023070079. https://doi.org/10.20944/preprints202307.0079.v1
APA Style
Wang, Y. (2023). Ballast Pick-Up Velocity in the Vertical Pipe of an Excavating Machine Slurry System. Preprints. https://doi.org/10.20944/preprints202307.0079.v1
Chicago/Turabian Style
Wang, Y. 2023 "Ballast Pick-Up Velocity in the Vertical Pipe of an Excavating Machine Slurry System" Preprints. https://doi.org/10.20944/preprints202307.0079.v1
Abstract
Abstract：Ballast pick-up velocity is a crucial parameter in the design of a slurry system in excavating devices, it influences transportation stability, safety, and economy of the system. In this study, a vertical pipe hydraulic experiment with different ballast sizes under water condition was conducted to investigate the ballast pick-up velocity in the shield slurry system. Thereafter, the coupling method of computational fluid dynamics and the discrete element method (CFD-DEM) was employed to establish a numerical model of the ballast pick-up velocity in the shield slurry system, and its applicability was verified by comparing the experiment results. Additionally, the ballast pick-up process under actual working conditions was studied, and the influence of ballast size and concentration on pick-up velocity was investigated. Overall, the primary findings of the study are as follows: 1) The numerical method can be applied to predict both the single ballast and ballast group pick-up velocity. 2) The pick-up process of the ballast group can be divided into four stages. 3) The conveying velocity of the ballast should be higher than the pick-up velocity of the single ballast to facilitate smooth discharge. 4) For a certain increase in ballast concentration, the pick-up velocity tends to be stable.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
