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Blade row and blockage modelling in an axial compressor throughflow code
Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2005.
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| Format: | Thesis |
| Language: | English |
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Stellenbosch : University of Stellenbosch
2008
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| _version_ | 1867613875842580480 |
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| access_status_str | Open Access |
| author | Thomas, Keegan D. |
| author2 | Van Backstrom, T. W. |
| author_browse | Thomas, Keegan D. Van Backstrom, T. W. |
| author_facet | Van Backstrom, T. W. Thomas, Keegan D. |
| author_sort | Thomas, Keegan D. |
| collection | Thesis |
| dc_rights_str_mv | University of Stellenbosch |
| description | Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2005. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/1870 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:43:06.129Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2008 |
| publishDateRange | 2008 |
| publishDateSort | 2008 |
| publisher | Stellenbosch : University of Stellenbosch |
| publisherStr | Stellenbosch : University of Stellenbosch |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/1870 Blade row and blockage modelling in an axial compressor throughflow code Thomas, Keegan D. Van Backstrom, T. W. Thiart, G. D. University of Stellenbosch. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. Dissertations -- Mechanical engineering Theses -- Mechanical engineering Axial flow compressors Compressors Mechanical and Mechatronic Engineering Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2005. The objective of the thesis is to improve the performance prediction of axial compressors, using a streamline throughflow method (STFM) code by modelling the hub and casing wall boundary layers, and additional flow mechanisms that occur within a blade row passage. Blade row total pressure loss and deviation correlations are reviewed. The effect of Mach number and the blade tip clearance gap are also reviewed as additional loss sources. An entrainment integral method is introduced to model the hub and casing wall boundary layers. Various 1-dimensional test cases are performed before implementing the integral boundary layer method into the STFM. The boundary layers represent an area blockage throughout the compressor, similar to a displacement thickness, but affects two velocity components. This effectively reduces the compressor flow area by altering the hub and casing radial positions at all stations. The results from the final STFM code with the integral boundary layer model, Mach number model and tip clearance model is compared against high pressure ratio compressor test cases. The blockage results, individual blade row and overall performance results are compared with published data. The deviation angle curve fits developed by Roos and Aungier are compared. There is good agreement for all parameters, except for the slope of deviation angle with incidence angle for low solidity. For the three compressors modelled, there is good agreement between the blockage prediction obtained and the blockage prediction of Aungier. The NACA 5-stage transonic compressor overall performance shows good agreement at all speeds, except for 90% of design speed. The NACA 10-stage subsonic compressor shows good agreement for low and medium speeds, but needs improvement at 90% and 100% of design speeds. The NACA 8-stage transonic compressor results compared well only at low speeds. 2008-08-04T09:38:02Z 2010-06-01T08:35:16Z 2008-08-04T09:38:02Z 2010-06-01T08:35:16Z 2005-03 Thesis http://hdl.handle.net/10019.1/1870 en University of Stellenbosch application/pdf Stellenbosch : University of Stellenbosch |
| spellingShingle | Dissertations -- Mechanical engineering Theses -- Mechanical engineering Axial flow compressors Compressors Mechanical and Mechatronic Engineering Thomas, Keegan D. Blade row and blockage modelling in an axial compressor throughflow code |
| title | Blade row and blockage modelling in an axial compressor throughflow code |
| title_full | Blade row and blockage modelling in an axial compressor throughflow code |
| title_fullStr | Blade row and blockage modelling in an axial compressor throughflow code |
| title_full_unstemmed | Blade row and blockage modelling in an axial compressor throughflow code |
| title_short | Blade row and blockage modelling in an axial compressor throughflow code |
| title_sort | blade row and blockage modelling in an axial compressor throughflow code |
| topic | Dissertations -- Mechanical engineering Theses -- Mechanical engineering Axial flow compressors Compressors Mechanical and Mechatronic Engineering |
| url | http://hdl.handle.net/10019.1/1870 |
| work_keys_str_mv | AT thomaskeegand bladerowandblockagemodellinginanaxialcompressorthroughflowcode |