Transient spray combustion characteristics in a gas–liquid pintle rocket engine under acoustic excitation
Abstract In order to investigate the acoustic oscillation characteristics of gas–liquid pintle rocket engines and elucidate the path by which spray combustion process provides energy to the combustor pressure oscillation, a LOX/GCH4 pintle engine with rectangular combustor was designed. By adding tr...
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| Language: | English |
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Nature Portfolio
2024-06-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-64027-2 |
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| _version_ | 1841544608521125888 |
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| author | Xuan Jin Chao Zhu Dejiang Chen Zhongpei Zhang |
| author_facet | Xuan Jin Chao Zhu Dejiang Chen Zhongpei Zhang |
| author_sort | Xuan Jin |
| collection | DOAJ |
| description | Abstract In order to investigate the acoustic oscillation characteristics of gas–liquid pintle rocket engines and elucidate the path by which spray combustion process provides energy to the combustor pressure oscillation, a LOX/GCH4 pintle engine with rectangular combustor was designed. By adding transverse velocity disturbance for the first time, the acoustic response of spray combustion process was simulated, and the effect of excitation amplitude on acoustic response was researched. Numerical results show that the adopted transverse velocity disturbance can excite the first-order transverse acoustic oscillation with same excitation frequency in the engine combustor. The acoustic response maintenance mechanism under extrinsic excitation is summarized for pintle engines. Besides, the temperature distribution inside the engine combustor tends to be uniform, and the low-frequency oscillation caused by the flame transverse swing gradually disappears. The amplitude of combustor pressure oscillation is dominated by excitement amplitude and phase difference between the pressure and heat release in combustion reaction region. In addition, the time-averaged combustor pressure can be amplified mainly by transverse velocity disturbance. The research work can provide a reference for related fire tests on the acoustic response of a subscale gas–liquid pintle engine. |
| format | Article |
| id | doaj-art-a02d91b243f043c8b4dcde3167e10bfc |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-a02d91b243f043c8b4dcde3167e10bfc2025-01-12T12:24:53ZengNature PortfolioScientific Reports2045-23222024-06-0114111410.1038/s41598-024-64027-2Transient spray combustion characteristics in a gas–liquid pintle rocket engine under acoustic excitationXuan Jin0Chao Zhu1Dejiang Chen2Zhongpei Zhang3Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development CenterHypervelocity Aerodynamics Institute, China Aerodynamics Research and Development CenterHypervelocity Aerodynamics Institute, China Aerodynamics Research and Development CenterHypervelocity Aerodynamics Institute, China Aerodynamics Research and Development CenterAbstract In order to investigate the acoustic oscillation characteristics of gas–liquid pintle rocket engines and elucidate the path by which spray combustion process provides energy to the combustor pressure oscillation, a LOX/GCH4 pintle engine with rectangular combustor was designed. By adding transverse velocity disturbance for the first time, the acoustic response of spray combustion process was simulated, and the effect of excitation amplitude on acoustic response was researched. Numerical results show that the adopted transverse velocity disturbance can excite the first-order transverse acoustic oscillation with same excitation frequency in the engine combustor. The acoustic response maintenance mechanism under extrinsic excitation is summarized for pintle engines. Besides, the temperature distribution inside the engine combustor tends to be uniform, and the low-frequency oscillation caused by the flame transverse swing gradually disappears. The amplitude of combustor pressure oscillation is dominated by excitement amplitude and phase difference between the pressure and heat release in combustion reaction region. In addition, the time-averaged combustor pressure can be amplified mainly by transverse velocity disturbance. The research work can provide a reference for related fire tests on the acoustic response of a subscale gas–liquid pintle engine.https://doi.org/10.1038/s41598-024-64027-2LOX/GCH4 pintle engineTransverse velocity disturbanceAcoustic response characteristicTransient spray combustion processNumerical simulation |
| spellingShingle | Xuan Jin Chao Zhu Dejiang Chen Zhongpei Zhang Transient spray combustion characteristics in a gas–liquid pintle rocket engine under acoustic excitation Scientific Reports LOX/GCH4 pintle engine Transverse velocity disturbance Acoustic response characteristic Transient spray combustion process Numerical simulation |
| title | Transient spray combustion characteristics in a gas–liquid pintle rocket engine under acoustic excitation |
| title_full | Transient spray combustion characteristics in a gas–liquid pintle rocket engine under acoustic excitation |
| title_fullStr | Transient spray combustion characteristics in a gas–liquid pintle rocket engine under acoustic excitation |
| title_full_unstemmed | Transient spray combustion characteristics in a gas–liquid pintle rocket engine under acoustic excitation |
| title_short | Transient spray combustion characteristics in a gas–liquid pintle rocket engine under acoustic excitation |
| title_sort | transient spray combustion characteristics in a gas liquid pintle rocket engine under acoustic excitation |
| topic | LOX/GCH4 pintle engine Transverse velocity disturbance Acoustic response characteristic Transient spray combustion process Numerical simulation |
| url | https://doi.org/10.1038/s41598-024-64027-2 |
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