THE EFFECTS OF LEAN AND SWEEP ON TRANSONIC FAN PERFORMANCE: A COMPUTATIONAL STUDY
The aerodynamics of transonic fans is discussed with emphasis on the use of threedimensional design techniques, such as blade sweep and lean, to improve their performance. In order to study the interaction of these 3D features with the shock pattern a series of five different designs is produced an...
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| Format: | Article |
| Language: | English |
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Gdańsk University of Technology
2002-01-01
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| Series: | TASK Quarterly |
| Subjects: | |
| Online Access: | https://journal.mostwiedzy.pl/TASKQuarterly/article/view/2258 |
| _version_ | 1828822944224116736 |
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| author | JOHN D. DENTON |
| author_facet | JOHN D. DENTON |
| author_sort | JOHN D. DENTON |
| collection | DOAJ |
| description |
The aerodynamics of transonic fans is discussed with emphasis on the use of threedimensional design techniques, such as blade sweep and lean, to improve their performance. In order to study the interaction of these 3D features with the shock pattern a series of five different designs is produced and analysed by CFD. It is found that the 3D features have remarkably little effect on the shock pattern near the tip where the shock must remain perpendicular to the casing. Lower down the blade significant shock sweep, and hence reduced shock loss, can be induced by 3D design but this is usually at the expense of reduced stall margin and increased loss elsewhere along the blade span. Overall, very little change in efficiency is produced by blade sweep or lean. However, forwards lean of the rotor does produce a small increase in mass flow.
Radial migration of the boundary fluid on the suction surface behind the shock is shown to play a large part in the aerodynamics near the blade tip.
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| first_indexed | 2024-12-12T13:25:32Z |
| format | Article |
| id | doaj.art-f1b92c2f70d44a9ca9ffd1cee9b586b5 |
| institution | Directory Open Access Journal |
| issn | 1428-6394 |
| language | English |
| last_indexed | 2024-12-12T13:25:32Z |
| publishDate | 2002-01-01 |
| publisher | Gdańsk University of Technology |
| record_format | Article |
| series | TASK Quarterly |
| spelling | doaj.art-f1b92c2f70d44a9ca9ffd1cee9b586b52022-12-22T00:23:12ZengGdańsk University of TechnologyTASK Quarterly1428-63942002-01-0161THE EFFECTS OF LEAN AND SWEEP ON TRANSONIC FAN PERFORMANCE: A COMPUTATIONAL STUDYJOHN D. DENTON0Whittle Laboratory, Cambridge University Engineering Department The aerodynamics of transonic fans is discussed with emphasis on the use of threedimensional design techniques, such as blade sweep and lean, to improve their performance. In order to study the interaction of these 3D features with the shock pattern a series of five different designs is produced and analysed by CFD. It is found that the 3D features have remarkably little effect on the shock pattern near the tip where the shock must remain perpendicular to the casing. Lower down the blade significant shock sweep, and hence reduced shock loss, can be induced by 3D design but this is usually at the expense of reduced stall margin and increased loss elsewhere along the blade span. Overall, very little change in efficiency is produced by blade sweep or lean. However, forwards lean of the rotor does produce a small increase in mass flow. Radial migration of the boundary fluid on the suction surface behind the shock is shown to play a large part in the aerodynamics near the blade tip. https://journal.mostwiedzy.pl/TASKQuarterly/article/view/2258transonic fantransonic compressorthree-dimensional flowshock wavesCFD |
| spellingShingle | JOHN D. DENTON THE EFFECTS OF LEAN AND SWEEP ON TRANSONIC FAN PERFORMANCE: A COMPUTATIONAL STUDY TASK Quarterly transonic fan transonic compressor three-dimensional flow shock waves CFD |
| title | THE EFFECTS OF LEAN AND SWEEP ON TRANSONIC FAN PERFORMANCE: A COMPUTATIONAL STUDY |
| title_full | THE EFFECTS OF LEAN AND SWEEP ON TRANSONIC FAN PERFORMANCE: A COMPUTATIONAL STUDY |
| title_fullStr | THE EFFECTS OF LEAN AND SWEEP ON TRANSONIC FAN PERFORMANCE: A COMPUTATIONAL STUDY |
| title_full_unstemmed | THE EFFECTS OF LEAN AND SWEEP ON TRANSONIC FAN PERFORMANCE: A COMPUTATIONAL STUDY |
| title_short | THE EFFECTS OF LEAN AND SWEEP ON TRANSONIC FAN PERFORMANCE: A COMPUTATIONAL STUDY |
| title_sort | effects of lean and sweep on transonic fan performance a computational study |
| topic | transonic fan transonic compressor three-dimensional flow shock waves CFD |
| url | https://journal.mostwiedzy.pl/TASKQuarterly/article/view/2258 |
| work_keys_str_mv | AT johnddenton theeffectsofleanandsweepontransonicfanperformanceacomputationalstudy AT johnddenton effectsofleanandsweepontransonicfanperformanceacomputationalstudy |