Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Die invloed van versteurde inlaatvloeipatrone op aksiaalwaaiers
Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | Afrikaans |
| Published: |
Stellenbosch : Stellenbosch University
2012
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613974258778112 |
|---|---|
| access_status_str | Open Access |
| author | Visser, J. G. J. |
| author2 | Kroger, D. G. |
| author_browse | Kroger, D. G. Visser, J. G. J. |
| author_facet | Kroger, D. G. Visser, J. G. J. |
| author_sort | Visser, J. G. J. |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/21767 |
| institution | Stellenbosch University (South Africa) |
| language | Afrikaans |
| last_indexed | 2026-06-10T12:44:39.798Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/21767 Die invloed van versteurde inlaatvloeipatrone op aksiaalwaaiers Visser, J. G. J. Kroger, D. G. University of Stellenbosch. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering Axial flow fans Draft cooling towers Power station Fans (Machinery) -- Performance. Dissertations -- Mechanical engineering Theses -- Mechanical engineering Air flow Cooling towers Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. Thesis (MEng)--Stellenbosch University, 1990. ENGLISH ABSTRACT: The causes of disturbances in the flow patterns at the inlets of axial flow fans that are used in mechanical draft cooling towers and the effects of these disturbances on the fans, were investigated. A scale model of a part of a mechanical draft cooling tower used at a power station was built for the purpose of this study. In the cooling tower the axial flow fans are arranged in a matrix configuration. It was noted from the scale model that the boundary fan was subjected to the worst inlet disturbances and this had an adverse effect on the flow it produced. Geometric alterations like the use of guide vanes and rounded inlets improved the flow through the boundary fan considerably. It was found that the performance of the fans is a function of the number of fans used and the elevation of the fans. Several tests to determine the performance of the cooling tower confirmed the results obtained from the experiments on the scale model. It was also found that the speed and direction of the prevailing wind have a significant effect on the cooling tower. Experiments to investigate the effects of cross-flow at the inlet of a fan indicated an increased flow through the fan at low cross-flow velocities and that the flow decreased at high cross-flow velocities. AFRIKAANSE OPSOMMING: Die invloed en oorsake van versteurde inlaatvloeipatrone op aksiaalwaaiers wat in meganiese-trek koeltorings gebruik word is ondersoek. 'n Skaaimodel van 'n deel van 'n meganiese-trek koeltoring wat by 'n kragstasie gebruik word is gebou vir die doel van die studie. Die aksiaalwaaiers wat in die koeltoring gebruik word is in 'n matrikskonfigurasie gerangskik. Vanaf die skaalmodel is waargeneem dat die randwaaier die ergste versteuring by die inlaat ervaar, en gevolglik minder vloei as die res van die waaiers in die opstelling lewer. Die vloei deur die randwaaier is verbeter deur verskillende geometriese wysigings soos leilemme en inlaatafrondings aan te bring. Daar is gevind dat die werking van die waaiers in die opstelling 'n funksie van die hoeveelheid waaiers asook die grondvryhoogte is. Om die werking van die koeltoring te bepaal is verskillende toetse daarop uitgevoer. Die resultate het die geldigheid van die skaalmodel bevestig. Daar is ook gevind dat die heersende windsterkte en rigting 'n definitiewe invloed op die koeltoring uitoefen. Die invloed van 'n dwarsvloei by die inlaat van 'n enkele waaier is ook eksperimenteel ondersoek. Die resultate toon dat daar 'n vermeerdering in vloei deur die waaier by lae dwarsvloeisnelhede plaasvind. Hoë dwarsvloeisnelhede veroorsaak egter 'n vermindering in vloei. 2012-07-23T09:36:02Z 2012-07-23T09:36:02Z 1990-12 Thesis http://hdl.handle.net/10019.1/21767 af Stellenbosch University 350 p. : ill. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Axial flow fans Draft cooling towers Power station Fans (Machinery) -- Performance. Dissertations -- Mechanical engineering Theses -- Mechanical engineering Air flow Cooling towers Visser, J. G. J. Die invloed van versteurde inlaatvloeipatrone op aksiaalwaaiers |
| title | Die invloed van versteurde inlaatvloeipatrone op aksiaalwaaiers |
| title_full | Die invloed van versteurde inlaatvloeipatrone op aksiaalwaaiers |
| title_fullStr | Die invloed van versteurde inlaatvloeipatrone op aksiaalwaaiers |
| title_full_unstemmed | Die invloed van versteurde inlaatvloeipatrone op aksiaalwaaiers |
| title_short | Die invloed van versteurde inlaatvloeipatrone op aksiaalwaaiers |
| title_sort | die invloed van versteurde inlaatvloeipatrone op aksiaalwaaiers |
| topic | Axial flow fans Draft cooling towers Power station Fans (Machinery) -- Performance. Dissertations -- Mechanical engineering Theses -- Mechanical engineering Air flow Cooling towers |
| url | http://hdl.handle.net/10019.1/21767 |
| work_keys_str_mv | AT visserjgj dieinvloedvanversteurdeinlaatvloeipatroneopaksiaalwaaiers |