Measurement of Vehicle Cooling Fan Air Flow using Laser Doppler Anemometry

dc.contributor.authorEnglén, David
dc.contributor.departmentChalmers tekniska högskola / Institutionen för mekanik och maritima vetenskapersv
dc.contributor.departmentChalmers University of Technology / Department of Mechanics and Maritime Sciencesen
dc.description.abstractWhen a combustion engine in a vehicle is operating it generates large amount of heat. Therefore it is crucial to provide cooling in the engine bay to prevent components from overheating. The axial fan in the front of the engine bay is a very import component of the cooling procedure, since it drives fresh air through the heat exchangers into the engine bay. To study the behaviour of the cooling air ow in the engine bay, numerical simulations are commonly used today, but in order to verify and develop numerical tools, physical testing is needed. In this thesis, LDA has been used to investigate how the actual ow eld behaves in the wake of a circular cylinder and the cooling fan used in a Volvo V40. Laser Doppler Anemometry, LDA is a non-intrusive optical technique used for velocity measurements of turbulent and laminar ows. The measurements were performed in the model scale wind tunnel at Volvo Cars. From the cylinder measurements, the performance of the experimental equipment could be con rmed to yield precise results. The downstream ow behaviour of the fan was investigated for cases with different contributions of wind tunnel velocity and fan rotation speed. Results of the downstream velocity eld in all three directions are presented at different distances downstream of the fan. Furthermore, the in uence of the mesh resolution on the measured velocity elds is shown and discussed. Lastly, a spectral analysis of the vortex shedding downstream the blade span was performed.
dc.relation.ispartofseriesMaster's thesis - Department of Mechanics and Maritime Sciences : 2018:50
dc.subjectStrömningsmekanik och akustik
dc.subjectGrundläggande vetenskaper
dc.subjectInnovation och entreprenörskap (nyttiggörande)
dc.subjectFluid Mechanics and Acoustics
dc.subjectBasic Sciences
dc.subjectInnovation & Entrepreneurship
dc.titleMeasurement of Vehicle Cooling Fan Air Flow using Laser Doppler Anemometry
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
local.programmeApplied mechanics (MPAME), MSc
Ladda ner
Original bundle
Visar 1 - 1 av 1
Bild (thumbnail)
32.53 MB
Adobe Portable Document Format