Yan Hu , Jincheng Zhang , Youyu Liu , Bowen Wu , Jiabao Pan
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引用次数: 0
Abstract
Suction multiphase jet machining (MJM) technology is a particulate erosion machining process utilizing vacuum to entrain slurry, wherein the motive tube is a pivotal unit that determines the jet nozzle performances. This paper presented an innovative MJM nozzle design featuring a Laval-shape motive tube, as well as the other three shapes: cylindrical, convergent and convergent-cylindrical. The work focused on investigating and comparing the performances of jet nozzles equipped with different motive tubes by experiments and simulations. It is found that the nozzle equipped with Laval-shape motive tube could generate the strongest vacuum while sucking the least slurry mixture, whereas these for nozzles equipped with cylindrical or convergent-cylindrical motive tube were opposite. The use of nozzle with Laval-shape motive tube was beneficial for rapid material removal owing to large velocity, enabling the fast machining of deep features, whereas the use of nozzles with cylindrical or convergent-cylindrical motive tube promoted the material's micro-removal to afford a relatively smooth surface. The significance of this work is that these findings are expected to provide a general guideline for MJM nozzle design and application.
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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