Effects of Upstream Wake Phasing on Transonic Axial Compressor Performance
The effect on rotor work of the phase of an upstream wake relative to the rotor is examined computationally and analytically for a transonic blade row. There can be an important impact on the time-mean performance when the time-dependent circulation of the shed vortices in the wake is phase-locked t...
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| Format: | Article |
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ASME International
2018
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| Online Access: | http://hdl.handle.net/1721.1/115048 https://orcid.org/0000-0002-8805-5289 https://orcid.org/0000-0001-9625-1020 |
| _version_ | 1826216952457068544 |
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| author | Gorrell, S. E. Nolan, Sean P.R. Botros, Barbara Brenda Tan, Choon S Adamczyk, John J Greitzer, Edward M |
| author2 | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics |
| author_facet | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Gorrell, S. E. Nolan, Sean P.R. Botros, Barbara Brenda Tan, Choon S Adamczyk, John J Greitzer, Edward M |
| author_sort | Gorrell, S. E. |
| collection | MIT |
| description | The effect on rotor work of the phase of an upstream wake relative to the rotor is examined computationally and analytically for a transonic blade row. There can be an important impact on the time-mean performance when the time-dependent circulation of the shed vortices in the wake is phase-locked to the rotor position, as it occurs when there is strong interaction between the rotor static pressure field and the upstream vanes. The rotor work is found to depend on the path of the wake vortices as they travel through the blade passage; for the configurations examined, the calculated change in time-mean rotor work was approximately 3%. It is shown that the effect on work input can be analyzed in terms of the influence of the time-mean relative stagnation pressure nonuniformity associated with the unsteady (but phase-locked) wake vortex flow field, in that the changes in vortex path alter the location of the nonuniformity relative to the rotor. Lower pressure rise and work input occurs when the rotor blade is embedded in a region of low time-mean relative stagnation pressure than when immersed in a region of high relative stagnation pressure. In addition to the work changes, which are essentially two-dimensional effects, it is demonstrated that the location of the wake may affect the tip clearance flow, implying a potential impact on the pressure rise capability and rotor stability limits. Model calculations are presented to give estimates of the magnitude and nature of this phenomenon. © 2011 American Society of Mechanical Engineers. |
| first_indexed | 2024-09-23T16:55:46Z |
| format | Article |
| id | mit-1721.1/115048 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T16:55:46Z |
| publishDate | 2018 |
| publisher | ASME International |
| record_format | dspace |
| spelling | mit-1721.1/1150482022-09-29T22:30:58Z Effects of Upstream Wake Phasing on Transonic Axial Compressor Performance Gorrell, S. E. Nolan, Sean P.R. Botros, Barbara Brenda Tan, Choon S Adamczyk, John J Greitzer, Edward M Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Nolan, Sean P.R. Botros, Barbara Brenda Tan, Choon S Adamczyk, John J Greitzer, Edward M The effect on rotor work of the phase of an upstream wake relative to the rotor is examined computationally and analytically for a transonic blade row. There can be an important impact on the time-mean performance when the time-dependent circulation of the shed vortices in the wake is phase-locked to the rotor position, as it occurs when there is strong interaction between the rotor static pressure field and the upstream vanes. The rotor work is found to depend on the path of the wake vortices as they travel through the blade passage; for the configurations examined, the calculated change in time-mean rotor work was approximately 3%. It is shown that the effect on work input can be analyzed in terms of the influence of the time-mean relative stagnation pressure nonuniformity associated with the unsteady (but phase-locked) wake vortex flow field, in that the changes in vortex path alter the location of the nonuniformity relative to the rotor. Lower pressure rise and work input occurs when the rotor blade is embedded in a region of low time-mean relative stagnation pressure than when immersed in a region of high relative stagnation pressure. In addition to the work changes, which are essentially two-dimensional effects, it is demonstrated that the location of the wake may affect the tip clearance flow, implying a potential impact on the pressure rise capability and rotor stability limits. Model calculations are presented to give estimates of the magnitude and nature of this phenomenon. © 2011 American Society of Mechanical Engineers. United States. Air Force Office of Scientific Research (Grant FA9550-05-1-0050) 2018-04-27T18:14:30Z 2018-04-27T18:14:30Z 2010-10 2009-08 2018-03-20T16:45:36Z Article http://purl.org/eprint/type/JournalArticle 0889-504X http://hdl.handle.net/1721.1/115048 Nolan, S. P. R. et al. “Effects of Upstream Wake Phasing on Transonic Axial Compressor Performance.” Journal of Turbomachinery 133, 2 (2011): 021010 © 2011 ASME https://orcid.org/0000-0002-8805-5289 https://orcid.org/0000-0001-9625-1020 http://dx.doi.org/10.1115/1.4000572 Journal of Turbomachinery Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf ASME International ASME |
| spellingShingle | Gorrell, S. E. Nolan, Sean P.R. Botros, Barbara Brenda Tan, Choon S Adamczyk, John J Greitzer, Edward M Effects of Upstream Wake Phasing on Transonic Axial Compressor Performance |
| title | Effects of Upstream Wake Phasing on Transonic Axial Compressor Performance |
| title_full | Effects of Upstream Wake Phasing on Transonic Axial Compressor Performance |
| title_fullStr | Effects of Upstream Wake Phasing on Transonic Axial Compressor Performance |
| title_full_unstemmed | Effects of Upstream Wake Phasing on Transonic Axial Compressor Performance |
| title_short | Effects of Upstream Wake Phasing on Transonic Axial Compressor Performance |
| title_sort | effects of upstream wake phasing on transonic axial compressor performance |
| url | http://hdl.handle.net/1721.1/115048 https://orcid.org/0000-0002-8805-5289 https://orcid.org/0000-0001-9625-1020 |
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