Yingran Fang , Xinggao Li , Yidong Guo , Dalong Jin , Hongzhi Liu
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引用次数: 0
Abstract
The circulation system of the slurry Tunnel Boring Machine (TBM) plays a pivotal role in delivering the slurry to the excavation face and transporting the excavated rock particles to the ground. The severe vibration and significant wear induced by the transportation of large-sized particles in pressure pipelines constitute a complex multiphysics coupling problem. In this study, a numerical model of pressure pipeline conveying large-size rock particles is established based on CFD-DEM-FEM multifield coupling method with the background of a slurry TBM construction in Beijing. The engineering measured pipeline pressure loss and vibration data verified the reasonableness of the multifield coupling model. The U.S. pipeline vibration standard is introduced to systematically evaluate the vibration intensity of slurry TBM circulating pipeline. The effects of particle mass flow rate, particle size, slurry flow speed, slurry viscosity, pipeline wall thickness and fixed spacing on pipeline vibration and wear are investigated, and suggestions for the control of vibration and wear reduction in the circulating pipeline are proposed. The relevant conclusions can provide a reference for the long-term operation of slurry TBM circulation pipelines under complex geological conditions.
期刊介绍：
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.
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