Experimental Investigations of fans for Personal Protective Equipment

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dc.contributorŠimurda David, Ing. Ph.D. : 65534
dc.contributor.advisorDvořák Václav, doc. Ing. Ph.D. : 55439
dc.contributor.authorMoro, Gafaru
dc.date.accessioned2019-10-14T10:21:56Z
dc.date.available2019-10-14T10:21:56Z
dc.date.committed2020-4-30
dc.date.defense2019-05-29
dc.date.submitted2018-11-1
dc.date.updated2019-5-29
dc.degree.levelIng.
dc.description.abstractThe need to meet certain specified requirements of fan operation has resulted in many researchers in the field of fan design to explore different design methods. This work focuses on the investigation of different fan design parameters that affect the performance of fans used in powered air-purifying respirator type. To ascertain the performance of fans in practical situations, a fan test stand was designed and manufactured. The test stand was used to experimentally measure aerodynamic parameters of the fan which include backpressure, and mass flow rate. Furthermore, experimental results were compared with theoretical 1-D model formulated by Euler, however, with losses accounted for. The parameters that were considered were mainly focused on the design of impellers with straight blades and backward curved blades. The effects of the design parameters on fan performance including blade inlet and outlet angles, blade number, rotation speed of fan, roughness of blades, and mutual position of impellers and shaft are discussed. Comparisons of performance curves using dimensionless quantities revealed that an increase in the outlet blade angle from 20° to 50° resulted in higher flow. Optimum number of blade required for this design was also investigated for impellers with 8, 12 and 16 number of blades. The effect of blade roughness, and improper assembly due to mutual position of impeller and shaft had little effect on performance. The fan operating point was observed at pressure and flow coefficients of 0.35 and 0.12, respectively when the fan was tested with a combined ABEP-R filter. In addition, impellers with backward curved blades were modified to have short blades, high number of blades, and varying blade pitch angles. The effects of these modifications on fan performance are discussed.cs
dc.description.abstractThe need to meet certain specified requirements of fan operation has resulted in many researchers in the field of fan design to explore different design methods. This work focuses on the investigation of different fan design parameters that affect the performance of fans used in powered air-purifying respirator type. To ascertain the performance of fans in practical situations, a fan test stand was designed and manufactured. The test stand was used to experimentally measure aerodynamic parameters of the fan which include backpressure, and mass flow rate. Furthermore, experimental results were compared with theoretical 1-D model formulated by Euler, however, with losses accounted for. The parameters that were considered were mainly focused on the design of impellers with straight blades and backward curved blades. The effects of the design parameters on fan performance including blade inlet and outlet angles, blade number, rotation speed of fan, roughness of blades, and mutual position of impellers and shaft are discussed. Comparisons of performance curves using dimensionless quantities revealed that an increase in the outlet blade angle from 20° to 50° resulted in higher flow. Optimum number of blade required for this design was also investigated for impellers with 8, 12 and 16 number of blades. The effect of blade roughness, and improper assembly due to mutual position of impeller and shaft had little effect on performance. The fan operating point was observed at pressure and flow coefficients of 0.35 and 0.12, respectively when the fan was tested with a combined ABEP-R filter. In addition, impellers with backward curved blades were modified to have short blades, high number of blades, and varying blade pitch angles. The effects of these modifications on fan performance are discussed.en
dc.description.mark
dc.format82 p. , 18 p. illust.app.
dc.format.extentIlustrace 2D drawings of test stand assembly and parts.
dc.identifier.signatureV 201901429
dc.identifier.urihttps://dspace.tul.cz/handle/15240/153976
dc.language.isoan
dc.relation.isbasedonmatsymblbrack1matsymbrbrack BLAIER, Frank P. Fan Handbook: Selection, Application and Design McGraw-Hill Education. 1998. ISBN 978-0070059337.
dc.relation.isbasedonvsp5mm matsymblbrack2matsymbrbrack GINGERY, David J. How To Design & Build Centrifugal Fans For the Home Shop. David J. Gibgery publishing, LLC, 1987, ISBN 978-1-878087-40-9.
dc.rightsVysokoškolská závěrečná práce je autorské dílo chráněné dle zákona č. 121/2000 Sb., autorský zákon, ve znění pozdějších předpisů. Je možné pořizovat z něj na své náklady a pro svoji osobní potřebu výpisy, opisy a rozmnoženiny. Jeho využití musí být v souladu s autorským zákonem https://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf a citační etikou https://knihovna.tul.cz/document/26cs
dc.rightsA university thesis is a work protected by the Copyright Act. Extracts, copies and transcripts of the thesis are allowed for personal use only and at one?s own expense. The use of thesis should be in compliance with the Copyright Act. https://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf and the citation ethics https://knihovna.tul.cz/document/26en
dc.rights.urihttps://knihovna.tul.cz/document/26
dc.rights.urihttps://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf
dc.subjectAir-purifying respiratorcs
dc.subjectdimensionless quantitiescs
dc.subjectBackpressurecs
dc.subjecttest standcs
dc.subjectAir-purifying respiratoren
dc.subjectdimensionless quantitiesen
dc.subjectBackpressureen
dc.subjecttest standen
dc.titleExperimental Investigations of fans for Personal Protective Equipmentcs
dc.titleExperimental Investigations of Fans for Personal Protective Equipmenten
dc.typediplomová prácecs
local.degree.abbreviationNavazující
local.degree.disciplineKSA
local.degree.programmeMechanical Engineering
local.degree.programmeabbreviationN2301
local.department.abbreviationKEZ
local.facultyFakulta strojnícs
local.faculty.abbreviationFS
local.identifier.authorS17000374
local.identifier.stag39424
local.identifier.verbiskpw06584665
local.note.administratorsautomat
local.poradovecislo1429
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