Nonlinear dynamic measurement of self-sustained thermoacoustic oscillations in a swirling combustor with a heat exchanger
Energy transfer from heat to sound is unwanted in many propulsion systems, including gas turbines and rocket motors. However, it is favorable in some practical applications, such as thermoacoustic heat engines or cooling systems. The present work considers an experimental investigation of self-susta...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2018
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| Online Access: | https://hdl.handle.net/10356/80737 http://hdl.handle.net/10220/46590 |
| _version_ | 1811688283101462528 |
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| author | Zhang, Zhiguo Li, Guoneng Li, Xinyan Han, Nuomin Jin, Xiao |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Zhang, Zhiguo Li, Guoneng Li, Xinyan Han, Nuomin Jin, Xiao |
| author_sort | Zhang, Zhiguo |
| collection | NTU |
| description | Energy transfer from heat to sound is unwanted in many propulsion systems, including gas turbines and rocket motors. However, it is favorable in some practical applications, such as thermoacoustic heat engines or cooling systems. The present work considers an experimental investigation of self-sustained thermoacoustic oscillations in a swirling combustor. Both subcritical and supercritical Hopf bifurcations are found to occur in this swirling combustor. In the presence of the subcritical bifurcation, a small change in the equivalent ratio leads to a sudden/hard jump from steady state to large amplitude limit cycle oscillations. The experimental study sheds lights on the heat-to-sound conversion process. In addition to increase the heat-to-sound energy conversion, an innovative water-involved heat exchanger is designed and experimentally implemented on the swirling combustor. By doing this, self-excited thermoacoustic oscillations are found to be intensified. The present work opens up a new applicable way to amplify thermoacoustic oscillations in swirling combustion systems. |
| first_indexed | 2024-10-01T05:29:44Z |
| format | Journal Article |
| id | ntu-10356/80737 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:29:44Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/807372023-03-04T17:13:51Z Nonlinear dynamic measurement of self-sustained thermoacoustic oscillations in a swirling combustor with a heat exchanger Zhang, Zhiguo Li, Guoneng Li, Xinyan Han, Nuomin Jin, Xiao School of Mechanical and Aerospace Engineering Self-sustained Thermoaocustic Oscillation Nonlinear Dynamics DRNTU::Engineering::Mechanical engineering Energy transfer from heat to sound is unwanted in many propulsion systems, including gas turbines and rocket motors. However, it is favorable in some practical applications, such as thermoacoustic heat engines or cooling systems. The present work considers an experimental investigation of self-sustained thermoacoustic oscillations in a swirling combustor. Both subcritical and supercritical Hopf bifurcations are found to occur in this swirling combustor. In the presence of the subcritical bifurcation, a small change in the equivalent ratio leads to a sudden/hard jump from steady state to large amplitude limit cycle oscillations. The experimental study sheds lights on the heat-to-sound conversion process. In addition to increase the heat-to-sound energy conversion, an innovative water-involved heat exchanger is designed and experimentally implemented on the swirling combustor. By doing this, self-excited thermoacoustic oscillations are found to be intensified. The present work opens up a new applicable way to amplify thermoacoustic oscillations in swirling combustion systems. MOE (Min. of Education, S’pore) Published version 2018-11-08T02:19:58Z 2019-12-06T13:57:52Z 2018-11-08T02:19:58Z 2019-12-06T13:57:52Z 2017 Journal Article Li, X., Han, N., Jin, X., Zhang, Z., & Li, G. (2017). Nonlinear Dynamic Measurement of Self-sustained Thermoacoustic Oscillations in a Swirling Combustor with a Heat Exchanger. Energy Procedia, 105, 4872-4877. doi:10.1016/j.egypro.2017.03.965 1876-6102 https://hdl.handle.net/10356/80737 http://hdl.handle.net/10220/46590 10.1016/j.egypro.2017.03.965 en Energy Procedia © 2017 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). 6 p. application/pdf |
| spellingShingle | Self-sustained Thermoaocustic Oscillation Nonlinear Dynamics DRNTU::Engineering::Mechanical engineering Zhang, Zhiguo Li, Guoneng Li, Xinyan Han, Nuomin Jin, Xiao Nonlinear dynamic measurement of self-sustained thermoacoustic oscillations in a swirling combustor with a heat exchanger |
| title | Nonlinear dynamic measurement of self-sustained thermoacoustic oscillations in a swirling combustor with a heat exchanger |
| title_full | Nonlinear dynamic measurement of self-sustained thermoacoustic oscillations in a swirling combustor with a heat exchanger |
| title_fullStr | Nonlinear dynamic measurement of self-sustained thermoacoustic oscillations in a swirling combustor with a heat exchanger |
| title_full_unstemmed | Nonlinear dynamic measurement of self-sustained thermoacoustic oscillations in a swirling combustor with a heat exchanger |
| title_short | Nonlinear dynamic measurement of self-sustained thermoacoustic oscillations in a swirling combustor with a heat exchanger |
| title_sort | nonlinear dynamic measurement of self sustained thermoacoustic oscillations in a swirling combustor with a heat exchanger |
| topic | Self-sustained Thermoaocustic Oscillation Nonlinear Dynamics DRNTU::Engineering::Mechanical engineering |
| url | https://hdl.handle.net/10356/80737 http://hdl.handle.net/10220/46590 |
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