Experimental Investigation of the Continuous Transition of Flame-Spreading near the Blow-Off Limit
This study investigates the continuous transition from flame-spreading to stabilized combustion near the blow-off limit in opposed forced flow by using expanding solid fuel duct that makes distribution of oxidizer velocity in the axial direction. The stabilized combustion is a diffusion flame that a...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Journal of Combustion |
| Online Access: | http://dx.doi.org/10.1155/2020/3187694 |
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| author | K. Komizu Y. Saito A. Tsuji H. Nagata |
| author_facet | K. Komizu Y. Saito A. Tsuji H. Nagata |
| author_sort | K. Komizu |
| collection | DOAJ |
| description | This study investigates the continuous transition from flame-spreading to stabilized combustion near the blow-off limit in opposed forced flow by using expanding solid fuel duct that makes distribution of oxidizer velocity in the axial direction. The stabilized combustion is a diffusion flame that appears in the Axial-Injection End-Burning Hybrid Rocket. The boundary between flame-spreading and stabilized combustion has not been investigated in detail. Polymethyl methacrylate (PMMA) rectangular ducts were used as a fuel, and gaseous oxygen was used as an oxidizer. All firing tests were conducted at atmospheric pressure. The diffusion flame traveled in the opposed-flow field where the oxidizer velocity increases continuously in the upstream direction. The combustion mode changed when oxidizer velocity at the flame tip exceeded a certain value. The oxidizer velocity used in this experiment ranges from 0.6 to 32.8 m/s. Experimental results show that a threshold oxidizer velocity of the transition can be determined. In this study, the threshold velocity was 26.4 m/s. |
| format | Article |
| id | doaj-art-7028d34c1d8b435d95f6dd6283679c06 |
| institution | Kabale University |
| issn | 2090-1968 2090-1976 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Combustion |
| spelling | doaj-art-7028d34c1d8b435d95f6dd6283679c062025-02-03T01:24:57ZengWileyJournal of Combustion2090-19682090-19762020-01-01202010.1155/2020/31876943187694Experimental Investigation of the Continuous Transition of Flame-Spreading near the Blow-Off LimitK. Komizu0Y. Saito1A. Tsuji2H. Nagata3Faculty of Engineering, Hokkaido University, Sapporo 060-8628, JapanDepartment of Aerospace Engineering, Tohoku University, Sendai 980-8579, JapanFaculty of Engineering, Hokkaido University, Sapporo 060-8628, JapanGraduate School of Engineering, Hokkaido University, Sapporo 060-8628, JapanThis study investigates the continuous transition from flame-spreading to stabilized combustion near the blow-off limit in opposed forced flow by using expanding solid fuel duct that makes distribution of oxidizer velocity in the axial direction. The stabilized combustion is a diffusion flame that appears in the Axial-Injection End-Burning Hybrid Rocket. The boundary between flame-spreading and stabilized combustion has not been investigated in detail. Polymethyl methacrylate (PMMA) rectangular ducts were used as a fuel, and gaseous oxygen was used as an oxidizer. All firing tests were conducted at atmospheric pressure. The diffusion flame traveled in the opposed-flow field where the oxidizer velocity increases continuously in the upstream direction. The combustion mode changed when oxidizer velocity at the flame tip exceeded a certain value. The oxidizer velocity used in this experiment ranges from 0.6 to 32.8 m/s. Experimental results show that a threshold oxidizer velocity of the transition can be determined. In this study, the threshold velocity was 26.4 m/s.http://dx.doi.org/10.1155/2020/3187694 |
| spellingShingle | K. Komizu Y. Saito A. Tsuji H. Nagata Experimental Investigation of the Continuous Transition of Flame-Spreading near the Blow-Off Limit Journal of Combustion |
| title | Experimental Investigation of the Continuous Transition of Flame-Spreading near the Blow-Off Limit |
| title_full | Experimental Investigation of the Continuous Transition of Flame-Spreading near the Blow-Off Limit |
| title_fullStr | Experimental Investigation of the Continuous Transition of Flame-Spreading near the Blow-Off Limit |
| title_full_unstemmed | Experimental Investigation of the Continuous Transition of Flame-Spreading near the Blow-Off Limit |
| title_short | Experimental Investigation of the Continuous Transition of Flame-Spreading near the Blow-Off Limit |
| title_sort | experimental investigation of the continuous transition of flame spreading near the blow off limit |
| url | http://dx.doi.org/10.1155/2020/3187694 |
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