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Flödes Kontroll: Xdin
2013 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This is a master thesis report on how to optimize the design of a certain kind of cyclone. The master thesis focuses on the flow characteristics, with focus on how the flow can be manipulated in order to make the cyclone perform as desired.Due to the complex swirling flows in a cyclone, the work was done with help from CFD. The whole project also included another master thesis that treated the study of two phase flow, i.e. drying of particles, which resulted in two master theses which merged at the end.This project has mainly focused on single phase flow. Later parts also included implementation of particles, i.e. two phase flow. The results from simulations were compared with experiments made on the cyclone in a test facility.The results from the simulation shows following results:Vortex generators Increased turbulence intensity in points locally around the vortex generator Increased turbulence intensity in the plane intersecting the vortex generators horizontally No significant increase in total cyclone pressure drop Decreased velocity magnitude throughout the entire cyclone Experiments showed no increase in drying effect with vortex generators Experiments showed increase in turbulence intensity locally around the vortex generatorsInlet configuration Incident angleo Increased total pressure drop by approximately 3 %o Decreased velocities throughout the cyclone, most 16 % at middle of coneo Decreased turbulence intensity throughout the cyclone, most 16 % at middle of barrel Section angleo Large section angles, over 20 degrees, reduces the velocities in the cycloneo Turbulence intensity decreases locally in the middle of the barrel, increases slightly locally in joint between barrel and coneo The section angle does not affect the pressure drop significantlyWinged core Decreased total pressure drop throughout the entire cyclone Increased velocity magnitude in the whole cyclone but the dust outlet Decreased turbulence intensity in the whole cyclone due to purely axial flow in vortex finder

Place, publisher, year, edition, pages
2013. , 67 p.
Keyword [sv]
Flow Control, CFD, cyclone
URN: urn:nbn:se:ltu:diva-46918Local ID: 4864e4af-d40a-4674-9f68-30ffab06516cOAI: diva2:1020234
Subject / course
Student thesis, at least 30 credits
Educational program
Mechanical Engineering, master's level
Validerat; 20131007 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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