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Numerical investigation of the grinding process in a beater wheel mill with classifier

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dc.contributor.author Anagnostopoulos, J en
dc.contributor.author Bergeles, G en
dc.date.accessioned 2014-03-01T01:13:13Z
dc.date.available 2014-03-01T01:13:13Z
dc.date.issued 1997 en
dc.identifier.issn 0742-4795 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/12369
dc.subject.classification Engineering, Mechanical en
dc.subject.other Classifiers en
dc.subject.other Computer simulation en
dc.subject.other Computer software en
dc.subject.other Equations of motion en
dc.subject.other Erosion en
dc.subject.other Evaporation en
dc.subject.other Mathematical models en
dc.subject.other Particle size analysis en
dc.subject.other Stochastic control systems en
dc.subject.other Beater wheel mill en
dc.subject.other Grinding mills en
dc.title Numerical investigation of the grinding process in a beater wheel mill with classifier en
heal.type journalArticle en
heal.identifier.primary 10.1115/1.2817049 en
heal.identifier.secondary http://dx.doi.org/10.1115/1.2817049 en
heal.language English en
heal.publicationDate 1997 en
heal.abstract A numerical investigation is presented for a two-dimensional simulation of the gas flow field and of the dynamic behavior of lignite particles inside Beater Wheel mills with classifier, installed in large coal-fired plants. A large number of representative particles are tracked using Lagrangian equations of motion, in combination with a stochastic model for particle turbulent dispersion. All the important mechanisms associated with the particle motion through the mill (particle-surface collisions and rebounding phenomena, fuel moisture evaporation and erosion wear of internal surfaces) are modeled. A special model is constructed to simulate the fragmentation of impacting particles and to calculate the size distribution of the final mill product. The models are regulated on the basis of available data from grinding mills of the Greek lignite power stations. The numerical code is capable of predicting the locations of significant erosion and to estimate the amount of particle mass that circulates through the mill via the classifying chamber. Mean impact velocity and impingement angle distributions along all the internal surfaces are also provided. The results indicate remarkable differences in the extent of the erosion caused at different locations of the mill. Also, the significant role of the leading blades arrangement inside the classifier on its classification performance and efficiency is elucidated. en
heal.publisher ASME-AMER SOC MECHANICAL ENG en
heal.journalName Journal of Engineering for Gas Turbines and Power en
dc.identifier.doi 10.1115/1.2817049 en
dc.identifier.isi ISI:A1997XQ14200032 en
dc.identifier.volume 119 en
dc.identifier.issue 3 en
dc.identifier.spage 723 en
dc.identifier.epage 733 en


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