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Development of a meshing tool for the analysis of an axial flow fan
Thesis (MEng) -- Stellenbosch University, 2023.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2023
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| _version_ | 1867614073050365952 |
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| access_status_str | Open Access |
| author | Stephan, Gideon Adrian |
| author2 | Van der Spuy, S. J. |
| author_browse | Stephan, Gideon Adrian Van der Spuy, S. J. |
| author_facet | Van der Spuy, S. J. Stephan, Gideon Adrian |
| author_sort | Stephan, Gideon Adrian |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng) -- Stellenbosch University, 2023. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/127131 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:46:13.197Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/127131 Development of a meshing tool for the analysis of an axial flow fan Stephan, Gideon Adrian Van der Spuy, S. J. Meyer, C. J. Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. Axial flow compressors -- Aerodynamics Fans (Machinery) -- Aerodynamics Airplanes -- Motors -- Cooling Turbines -- Blades UCTD Thesis (MEng) -- Stellenbosch University, 2023. ENGLISH SUMMARY: OpenFOAM is an open source computational fluid dynamics (CFD) code. Meshing workflows in OpenFOAM, using the built-in utilities, are often convoluted, particularly for complex geometries. This study aimed to develop a customized meshing tool for a large diameter, low solidity axial flow fan using Python. The 3-D blade meshing approach generates a 2-D airfoil mesh at radial stations along the blade span. The airfoil meshes are stacked and the entire mesh is wrapped to form a periodic annular domain. This methodology results in a mesh that is well aligned with the velocity streamlines and has low mesh non-orthogonality. The 2-D airfoil mesh uses extrusion and continuous airfoil characterisation, using three Bezier Splines, to create a highly orthogonal near wall mesh. A versatile spline relaxation method is used to generate a gradual transition region mesh from the near wall mesh to the far field geometry requirements. The 2-D meshing tool is compared to experimental data for the LS0413 airfoil. The numerical model developed using the meshing tool showed a good correlation to the airfoil characteristics for unseparated, fully turbulent flows, with an error band of 0.91%. The blade meshing tool is used to conduct CFD study of the B2a fan. The results generated using the meshing tool are compared to existing numerical and experimental results. The static pressure characteristic, with tip clearance correction, showed a good correlation with the experimental characteristic at near design point flow rates with an error band of 4%. The blade swirl velocity showed a good comparison to existing models with small deviations at the hub and tip. Fan efficiency showed the same trend as the experimental characteristic but was higher due to a higher total to static pressure rise and a lower fan power consumption when compared to the comparison set. The study showed that a numerical model compiled using the developed meshing tool can provide a reasonable estimate of a large diameter, low solidity axial flow fan. AFRIKAANSE OPSOMMING: OpenFOAM is n oopbron numeriese berekeningsvloeimeganika (BVM) kode. Die werkvloei vir die skep van roosters in OpenFOAM met behulp van die ingeboude sagteware, is dikwels ingewikkeld, veral vir komplekse geometriee. Die doel van die studie is om n pasgemaakte rooster program vir n groot deursnee, lae soliditeit aksiaalvloeiwaaier te ontwikkel deur van Python gebruik te maak. Die 3-D- waaierlem rooster-benadering genereer n 2-D-vlerkprofiel rooster by radiale stasies al langs die lemspanwydte. Die vlerkprofielroosters word gestapel en toegevou om die 3-D periodieke rooster te bou. Die metodologie verseker n rooster wat goed belyn is met die waaierlem- snelheidstroomlyne met n hoe roosterortogonaliteit. Die 2-D-vlerkprofielrooster gebruik ekstrusie en deurlopende vlerkprofiel karakterisering deur drie Bezier krommepassing te gebruik om ’n hoogs ortonogonaal naby-wand rooster te skep. n Veelsydige krommepassing verslappingametode word gebruik om ’n geleidelike oorgangsgebiedrooster vanaf die naby-wandrooster na die ver-veld geometrie te genereer. Die resultate wat behaal is met die model toon goeie ooreenkomste met die eksperimentele vlerkprofieleienskappe vir aangehegte, volle turbulente vloei, bine n foutband van 0.91%. Die waaierlem-rooster sagteware word gebruik om n BVM- studie op die B2awaaier uit te voer. Die model word met bestaande numeriese en eksperimentele resultate vergelyk. Die statiese drukkenkromme toon goeie korrelasie met die eksperimentele resultate naby die ontwerp volumevloei, binne ’n foutband van 4%. Lem dwarsvloeisnelheidsverdeling toon goeie korrelasie met resultate vanaf bestaande modelle, met slegs klein afwykings by die naaf en die punt. Waaierdoeltreffendheid het dieselfde neiging as die eksperimentele resultate getoon, maar is hoer as gevolg van n hoer statiese drukstyging en ’n laer drywing. Die studie het aangetoon dat die resultate wat behaal is met die model is ’n redelike skatting van die prestasie van ’n groot deursnee, lae soliditeit aksiaalvloeiwaaier. Masters 2023-03-02T12:10:01Z 2023-05-18T07:05:48Z 2023-03-02T12:10:01Z 2023-05-18T07:05:48Z 2023-03 Thesis http://hdl.handle.net/10019.1/127131 en_ZA Stellenbosch University xx, 131 pages : illustrations, includes annexures application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Axial flow compressors -- Aerodynamics Fans (Machinery) -- Aerodynamics Airplanes -- Motors -- Cooling Turbines -- Blades UCTD Stephan, Gideon Adrian Development of a meshing tool for the analysis of an axial flow fan |
| title | Development of a meshing tool for the analysis of an axial flow fan |
| title_full | Development of a meshing tool for the analysis of an axial flow fan |
| title_fullStr | Development of a meshing tool for the analysis of an axial flow fan |
| title_full_unstemmed | Development of a meshing tool for the analysis of an axial flow fan |
| title_short | Development of a meshing tool for the analysis of an axial flow fan |
| title_sort | development of a meshing tool for the analysis of an axial flow fan |
| topic | Axial flow compressors -- Aerodynamics Fans (Machinery) -- Aerodynamics Airplanes -- Motors -- Cooling Turbines -- Blades UCTD |
| url | http://hdl.handle.net/10019.1/127131 |
| work_keys_str_mv | AT stephangideonadrian developmentofameshingtoolfortheanalysisofanaxialflowfan |