Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation Engine
A shock wave focusing initiation engine was assembled and tested in an experimental program. The effective pyrolysis rate of the pre-combustor was evaluated over a range of supplementary fuel ratio in this paper. Results highlight two operational modes of the resonant cavity: (1) pulsating combustio...
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| Format: | Article |
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MDPI AG
2022-07-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/24/7/1007 |
| _version_ | 1797406517703475200 |
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| author | Shida Xu Feilong Song Xin Chen Hesong Zhang Xingkui Yang Jianping Zhou |
| author_facet | Shida Xu Feilong Song Xin Chen Hesong Zhang Xingkui Yang Jianping Zhou |
| author_sort | Shida Xu |
| collection | DOAJ |
| description | A shock wave focusing initiation engine was assembled and tested in an experimental program. The effective pyrolysis rate of the pre-combustor was evaluated over a range of supplementary fuel ratio in this paper. Results highlight two operational modes of the resonant cavity: (1) pulsating combustion mode, (2) stable combustion mode. The appearance of the two combustion modes is jointly affected by the flow and the structural characteristic value of the combustion chamber. This paper uses images, time-frequency analysis, and nonlinear time series analysis methods to identify and distinguish these two combustion modes. It is believed that the interaction between the combustion chamber and the supply plenum is the probable reason for different combustion modes. The experiment has found that structural parameters and import flow parameters have an impact on the initiation of the combustion chamber. Increasing the injection pressure can appropriately broaden the fuel-rich boundary of initiation. Low equivalence ratio and high injection pressure can also appropriately increase the combustion working frequency in a small range. From the perspective of pressure utilization, under the premise of ensuring successful initiation, injection pressure should not be too high. |
| first_indexed | 2024-03-09T03:26:39Z |
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| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-03-09T03:26:39Z |
| publishDate | 2022-07-01 |
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| record_format | Article |
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| spelling | doaj.art-a33482eb57fc492b89bb443fd8e1531f2023-12-03T15:01:26ZengMDPI AGEntropy1099-43002022-07-01247100710.3390/e24071007Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation EngineShida Xu0Feilong Song1Xin Chen2Hesong Zhang3Xingkui Yang4Jianping Zhou5Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an 710038, ChinaScience and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an 710038, ChinaScience and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an 710038, ChinaScience and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an 710038, ChinaScience and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an 710038, ChinaScience and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an 710038, ChinaA shock wave focusing initiation engine was assembled and tested in an experimental program. The effective pyrolysis rate of the pre-combustor was evaluated over a range of supplementary fuel ratio in this paper. Results highlight two operational modes of the resonant cavity: (1) pulsating combustion mode, (2) stable combustion mode. The appearance of the two combustion modes is jointly affected by the flow and the structural characteristic value of the combustion chamber. This paper uses images, time-frequency analysis, and nonlinear time series analysis methods to identify and distinguish these two combustion modes. It is believed that the interaction between the combustion chamber and the supply plenum is the probable reason for different combustion modes. The experiment has found that structural parameters and import flow parameters have an impact on the initiation of the combustion chamber. Increasing the injection pressure can appropriately broaden the fuel-rich boundary of initiation. Low equivalence ratio and high injection pressure can also appropriately increase the combustion working frequency in a small range. From the perspective of pressure utilization, under the premise of ensuring successful initiation, injection pressure should not be too high.https://www.mdpi.com/1099-4300/24/7/1007shock wave focusingcombustion modepyrolysisnonlinear time series analysispressure utilization |
| spellingShingle | Shida Xu Feilong Song Xin Chen Hesong Zhang Xingkui Yang Jianping Zhou Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation Engine Entropy shock wave focusing combustion mode pyrolysis nonlinear time series analysis pressure utilization |
| title | Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation Engine |
| title_full | Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation Engine |
| title_fullStr | Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation Engine |
| title_full_unstemmed | Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation Engine |
| title_short | Experimental Diagnosis on Combustion Characteristic of Shock Wave Focusing Initiation Engine |
| title_sort | experimental diagnosis on combustion characteristic of shock wave focusing initiation engine |
| topic | shock wave focusing combustion mode pyrolysis nonlinear time series analysis pressure utilization |
| url | https://www.mdpi.com/1099-4300/24/7/1007 |
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