Jianping Wei , Yi Huang , Changjiang Chen , Dayang Yu , Dezhong Kong , Junhao Zhu , Yong Liu
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引用次数: 0
Abstract
The low-pressure supersonic abrasive air jet (AAJ) effectively addresses high containment pressures and hard rock. The energy distribution of the AAJ during travel rock-slitting is primarily influenced by the abrasive mass flow rate, which significantly impacts cutting efficiency. A CFD-DEM model was used to analyze the effects of nozzle travel speed and abrasive mass flow rate on particle velocity and energy distribution. Results indicate that under a constant nozzle travel speed, the impact kinetic energy varies with changes in the abrasive mass flow rate. The increase in abrasive mass flow rate enhances the energy of rock, but an upper limit exists. As nozzle travel speed increases, the optimal mass flow rate also rises. However, higher nozzle speeds reduce cutting efficiency due to shorter jet-rock contact time. Thus, selecting the optimal mass flow rate at lower nozzle speeds is an economical strategy for maximizing rock-breaking performance.
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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