Jiawei Zhou , Tang Gan , Xiangyu Yan , Yaojie Xu , Hongxiang Jiang
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引用次数: 0
Abstract
To clarify the relationship between flow regimes and acoustic signals in pneumatic conveying, the acoustic signal of pneumatic conveying process was non-intrusively collected. Frequency and energy characteristics of acoustic signals were analyzed by using the discrete wavelet transform (DWT) and the Hilbert-Huang transform (HHT) to reveal the flow regime transformation during pneumatic conveying. Results show that the effective acoustic signal of pneumatic conveying is mainly concentrated in the region of 0 to 37.5 Hz, and the amplitude of the acoustic signal is positively correlated with the discharge pressure. The flow regime changes from plug flow to dune flow and suspended flow with the increase in acoustic signal amplitude in. The summarized Hilbert spectrum energy of the acoustic signal during the steady conveying stage is mainly concentrated in the range of 0 to 20 Hz. The energy of the Intrinsic Mode Function (IMF) components shows a trend of first decreasing and then increasing with the discharge pressure, which corresponds to plug flow, dune flow, and suspended flow regimes, respectively.
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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