Influences of Dual Air-Swirler Angles on Swirling Injection and Combustion of Kerosene-Air at a Supercritical Pressure
High-pressure swirling injection and combustion are important phenomena in a modern gas turbine engine as its compression ratio has been significantly increased to improve thermodynamic efficiency. Large eddy simulations are conducted to analyze turbulent flow and combustion of kerosene-air in a dua...
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Frontiers Media S.A.
2025-01-01
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| Series: | Aerospace Research Communications |
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| Online Access: | https://www.frontierspartnerships.org/articles/10.3389/arc.2025.14110/full |
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| author | Danyang Wang Danyang Wang Dongxin Huang Jianguo Xu Hua Meng Hua Meng |
| author_facet | Danyang Wang Danyang Wang Dongxin Huang Jianguo Xu Hua Meng Hua Meng |
| author_sort | Danyang Wang |
| collection | DOAJ |
| description | High-pressure swirling injection and combustion are important phenomena in a modern gas turbine engine as its compression ratio has been significantly increased to improve thermodynamic efficiency. Large eddy simulations are conducted to analyze turbulent flow and combustion of kerosene-air in a dual-air-swirler gas turbine model combustor at a supercritical pressure of 4 MPa, above the critical pressure of kerosene. The present work focuses particularly on effects of the two air swirler angles on flow and combustion dynamics. Numerical results indicate that the inner air swirler exerts strong impact on fuel-air mixing and chemical reactions inside the inner injector, leading to a Y shaped recirculating flow and a V shaped flame at an inner swirler angle of 40°. The precessing vortex core (PVC) is generated by the inner air swirling injection, and detailed analyses reveal that the PVC frequency is controlled mainly by the inner swirl number and the maximum axial velocity from the inner injector. The outer air swirler makes significant impact on the central recirculation structure and turbulent combustion inside the combustion chamber and weakly influences the PVC frequency. For the present supercritical-pressure turbulent combustion in a dual-air-swirler system, it appears that proper combination of the two air swirler angles could avoid chemical reactions deep inside the injector while enhancing fuel-air mixing and combustion in the combustion chamber. |
| format | Article |
| id | doaj-art-9f69da5b10b246b9bdc9a1e46e8cc487 |
| institution | Kabale University |
| issn | 2813-6209 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
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| series | Aerospace Research Communications |
| spelling | doaj-art-9f69da5b10b246b9bdc9a1e46e8cc4872025-01-20T04:11:48ZengFrontiers Media S.A.Aerospace Research Communications2813-62092025-01-01310.3389/arc.2025.1411014110Influences of Dual Air-Swirler Angles on Swirling Injection and Combustion of Kerosene-Air at a Supercritical PressureDanyang Wang0Danyang Wang1Dongxin Huang2Jianguo Xu3Hua Meng4Hua Meng5School of Aeronautics and Astronautics, Zhejiang University, Hangzhou, Zhejiang, ChinaHuanjiang Laboratory, Zhuji, Zhejiang, ChinaZhejiang Development and Planning Institute, Hangzhou, Zhejiang, ChinaShanghai Institute of Space Propulsion, Shanghai, ChinaSchool of Aeronautics and Astronautics, Zhejiang University, Hangzhou, Zhejiang, ChinaHuanjiang Laboratory, Zhuji, Zhejiang, ChinaHigh-pressure swirling injection and combustion are important phenomena in a modern gas turbine engine as its compression ratio has been significantly increased to improve thermodynamic efficiency. Large eddy simulations are conducted to analyze turbulent flow and combustion of kerosene-air in a dual-air-swirler gas turbine model combustor at a supercritical pressure of 4 MPa, above the critical pressure of kerosene. The present work focuses particularly on effects of the two air swirler angles on flow and combustion dynamics. Numerical results indicate that the inner air swirler exerts strong impact on fuel-air mixing and chemical reactions inside the inner injector, leading to a Y shaped recirculating flow and a V shaped flame at an inner swirler angle of 40°. The precessing vortex core (PVC) is generated by the inner air swirling injection, and detailed analyses reveal that the PVC frequency is controlled mainly by the inner swirl number and the maximum axial velocity from the inner injector. The outer air swirler makes significant impact on the central recirculation structure and turbulent combustion inside the combustion chamber and weakly influences the PVC frequency. For the present supercritical-pressure turbulent combustion in a dual-air-swirler system, it appears that proper combination of the two air swirler angles could avoid chemical reactions deep inside the injector while enhancing fuel-air mixing and combustion in the combustion chamber.https://www.frontierspartnerships.org/articles/10.3389/arc.2025.14110/fullgas turbine combustorlarge eddy simulationswirl numberPVC frequencystrouhal number |
| spellingShingle | Danyang Wang Danyang Wang Dongxin Huang Jianguo Xu Hua Meng Hua Meng Influences of Dual Air-Swirler Angles on Swirling Injection and Combustion of Kerosene-Air at a Supercritical Pressure Aerospace Research Communications gas turbine combustor large eddy simulation swirl number PVC frequency strouhal number |
| title | Influences of Dual Air-Swirler Angles on Swirling Injection and Combustion of Kerosene-Air at a Supercritical Pressure |
| title_full | Influences of Dual Air-Swirler Angles on Swirling Injection and Combustion of Kerosene-Air at a Supercritical Pressure |
| title_fullStr | Influences of Dual Air-Swirler Angles on Swirling Injection and Combustion of Kerosene-Air at a Supercritical Pressure |
| title_full_unstemmed | Influences of Dual Air-Swirler Angles on Swirling Injection and Combustion of Kerosene-Air at a Supercritical Pressure |
| title_short | Influences of Dual Air-Swirler Angles on Swirling Injection and Combustion of Kerosene-Air at a Supercritical Pressure |
| title_sort | influences of dual air swirler angles on swirling injection and combustion of kerosene air at a supercritical pressure |
| topic | gas turbine combustor large eddy simulation swirl number PVC frequency strouhal number |
| url | https://www.frontierspartnerships.org/articles/10.3389/arc.2025.14110/full |
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