Effects of Transient Heat Transfer on Compressor Stability
The effects of heat transfer between the compressor structure and the primary gas path flow on compressor stability are investigated during hot engine re-acceleration transients. A mean line analysis of an advanced, high-pressure ratio compressor is extended to include the effects of heat transfer o...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Society of Mechanical Engineers (ASME)
2020
|
| Online Access: | https://hdl.handle.net/1721.1/123436 |
| _version_ | 1826206929517543424 |
|---|---|
| author | Kiss, A. Spakovszky, Zoltan S |
| author2 | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics |
| author_facet | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Kiss, A. Spakovszky, Zoltan S |
| author_sort | Kiss, A. |
| collection | MIT |
| description | The effects of heat transfer between the compressor structure and the primary gas path flow on compressor stability are investigated during hot engine re-acceleration transients. A mean line analysis of an advanced, high-pressure ratio compressor is extended to include the effects of heat transfer on both stage matching and blade row flow angle deviation. A lumped capacitance model is used to compute the heat transfer of the compressor blades, hub, and casing to the primary gas path. The inputs to the compressor model with heat transfer are based on a combination of full engine data, compressor test rig measurements, and detailed heat transfer computations. Nonadiabatic transient calculations show a 8.0 point reduction in stall margin from the adiabatic case, with heat transfer predominantly altering the transient stall line. 3.4 points of the total stall margin reduction are attributed to the effect of heat transfer on blade row deviation, with the remainder attributed to stage rematching. Heat transfer increases loading in the front stages and destabilizes the front block. Sensitivity studies show a strong dependence of stall margin to heat transfer magnitude and flow angle deviation at low speed, due to the effects of compressibility. Computations for the same transient using current cycle models with bulk heat transfer effects only capture 1.2 points of the 8.0 point stall margin reduction. Based on this new capability, opportunities exist early in the design process to address potential stability issues due to transient heat transfer. |
| first_indexed | 2024-09-23T13:40:49Z |
| format | Article |
| id | mit-1721.1/123436 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:40:49Z |
| publishDate | 2020 |
| publisher | American Society of Mechanical Engineers (ASME) |
| record_format | dspace |
| spelling | mit-1721.1/1234362022-10-01T16:29:15Z Effects of Transient Heat Transfer on Compressor Stability Kiss, A. Spakovszky, Zoltan S Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Massachusetts Institute of Technology. Gas Turbine Laboratory The effects of heat transfer between the compressor structure and the primary gas path flow on compressor stability are investigated during hot engine re-acceleration transients. A mean line analysis of an advanced, high-pressure ratio compressor is extended to include the effects of heat transfer on both stage matching and blade row flow angle deviation. A lumped capacitance model is used to compute the heat transfer of the compressor blades, hub, and casing to the primary gas path. The inputs to the compressor model with heat transfer are based on a combination of full engine data, compressor test rig measurements, and detailed heat transfer computations. Nonadiabatic transient calculations show a 8.0 point reduction in stall margin from the adiabatic case, with heat transfer predominantly altering the transient stall line. 3.4 points of the total stall margin reduction are attributed to the effect of heat transfer on blade row deviation, with the remainder attributed to stage rematching. Heat transfer increases loading in the front stages and destabilizes the front block. Sensitivity studies show a strong dependence of stall margin to heat transfer magnitude and flow angle deviation at low speed, due to the effects of compressibility. Computations for the same transient using current cycle models with bulk heat transfer effects only capture 1.2 points of the 8.0 point stall margin reduction. Based on this new capability, opportunities exist early in the design process to address potential stability issues due to transient heat transfer. 2020-01-14T15:34:01Z 2020-01-14T15:34:01Z 2018-10 2019-11-01T15:48:32Z Article http://purl.org/eprint/type/JournalArticle 0889-504X 1528-8900 https://hdl.handle.net/1721.1/123436 Kiss, A. and Z. Spakovszky. "Effects of Transient Heat Transfer on Compressor Stability." Journal of Turbomachinery 140, 12 (December 2019): 121003 © 2019 ASME en http://dx.doi.org/10.1115/1.4041290 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 American Society of Mechanical Engineers (ASME) ASME |
| spellingShingle | Kiss, A. Spakovszky, Zoltan S Effects of Transient Heat Transfer on Compressor Stability |
| title | Effects of Transient Heat Transfer on Compressor Stability |
| title_full | Effects of Transient Heat Transfer on Compressor Stability |
| title_fullStr | Effects of Transient Heat Transfer on Compressor Stability |
| title_full_unstemmed | Effects of Transient Heat Transfer on Compressor Stability |
| title_short | Effects of Transient Heat Transfer on Compressor Stability |
| title_sort | effects of transient heat transfer on compressor stability |
| url | https://hdl.handle.net/1721.1/123436 |
| work_keys_str_mv | AT kissa effectsoftransientheattransferoncompressorstability AT spakovszkyzoltans effectsoftransientheattransferoncompressorstability |