Experimental Studies on Thermal Oxidation and Laser Ignition Properties of Al-Mg-Li Powders
Powder ramjets are a kind of vehicle propulsion system with high specific impulse and efficiency. They provide significant benefits in terms of extended propulsion and thrust adjustment. The pursuit of a highly reactive fuel appropriate for powder ramjets is likely to stimulate advancements in innov...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/21/6931 |
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| author | Yingying Lu Kai Ma Changchao Guo Ming Jiang Chengfeng Wu Shipeng Li Shaoqing Hu |
| author_facet | Yingying Lu Kai Ma Changchao Guo Ming Jiang Chengfeng Wu Shipeng Li Shaoqing Hu |
| author_sort | Yingying Lu |
| collection | DOAJ |
| description | Powder ramjets are a kind of vehicle propulsion system with high specific impulse and efficiency. They provide significant benefits in terms of extended propulsion and thrust adjustment. The pursuit of a highly reactive fuel appropriate for powder ramjets is likely to stimulate advancements in innovative propulsion systems, which are crucial for deep space exploration and long-term space missions. This work presents experimental studies on the thermal oxidation and laser ignition performance of aluminum–magnesium–lithium powders at atmospheric pressure. TG-DSC curves of powders in three heating rates were obtained. The ignition processes and ignition delay times were recorded by a CO<sub>2</sub> laser ignition experiment system at a laser power of 10~60 W. The results show that at a lower heating rate of 10 K/min, the powder’s thermal hysteresis is less, and the powder energy released in stage I is more concentrated. However, the degree of heat release concentration approached a similar level at heating rates of 30 K and 50 K. The ignition delay time decreased as the laser flux density increased. When the laser flux density exceeds 80 W/cm<sup>2</sup>, the effect of laser power on the ignition delay time decreases. At atmospheric pressure, the mathematical relationship between ignition delay time and laser flux density is given. Finally, the powder ignition processes at different laser powers are represented graphically. |
| first_indexed | 2024-03-11T11:26:08Z |
| format | Article |
| id | doaj.art-436fd4643daa4e869e86a373079b1fba |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T11:26:08Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-436fd4643daa4e869e86a373079b1fba2023-11-10T15:07:22ZengMDPI AGMaterials1996-19442023-10-011621693110.3390/ma16216931Experimental Studies on Thermal Oxidation and Laser Ignition Properties of Al-Mg-Li PowdersYingying Lu0Kai Ma1Changchao Guo2Ming Jiang3Chengfeng Wu4Shipeng Li5Shaoqing Hu6School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, ChinaXi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaXi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaXi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaXi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaSchool of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, ChinaXi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaPowder ramjets are a kind of vehicle propulsion system with high specific impulse and efficiency. They provide significant benefits in terms of extended propulsion and thrust adjustment. The pursuit of a highly reactive fuel appropriate for powder ramjets is likely to stimulate advancements in innovative propulsion systems, which are crucial for deep space exploration and long-term space missions. This work presents experimental studies on the thermal oxidation and laser ignition performance of aluminum–magnesium–lithium powders at atmospheric pressure. TG-DSC curves of powders in three heating rates were obtained. The ignition processes and ignition delay times were recorded by a CO<sub>2</sub> laser ignition experiment system at a laser power of 10~60 W. The results show that at a lower heating rate of 10 K/min, the powder’s thermal hysteresis is less, and the powder energy released in stage I is more concentrated. However, the degree of heat release concentration approached a similar level at heating rates of 30 K and 50 K. The ignition delay time decreased as the laser flux density increased. When the laser flux density exceeds 80 W/cm<sup>2</sup>, the effect of laser power on the ignition delay time decreases. At atmospheric pressure, the mathematical relationship between ignition delay time and laser flux density is given. Finally, the powder ignition processes at different laser powers are represented graphically.https://www.mdpi.com/1996-1944/16/21/6931powder ramjetAl-Mg-Li alloy powderslaser ignitionignition delay time |
| spellingShingle | Yingying Lu Kai Ma Changchao Guo Ming Jiang Chengfeng Wu Shipeng Li Shaoqing Hu Experimental Studies on Thermal Oxidation and Laser Ignition Properties of Al-Mg-Li Powders Materials powder ramjet Al-Mg-Li alloy powders laser ignition ignition delay time |
| title | Experimental Studies on Thermal Oxidation and Laser Ignition Properties of Al-Mg-Li Powders |
| title_full | Experimental Studies on Thermal Oxidation and Laser Ignition Properties of Al-Mg-Li Powders |
| title_fullStr | Experimental Studies on Thermal Oxidation and Laser Ignition Properties of Al-Mg-Li Powders |
| title_full_unstemmed | Experimental Studies on Thermal Oxidation and Laser Ignition Properties of Al-Mg-Li Powders |
| title_short | Experimental Studies on Thermal Oxidation and Laser Ignition Properties of Al-Mg-Li Powders |
| title_sort | experimental studies on thermal oxidation and laser ignition properties of al mg li powders |
| topic | powder ramjet Al-Mg-Li alloy powders laser ignition ignition delay time |
| url | https://www.mdpi.com/1996-1944/16/21/6931 |
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