High-precision reconstruction of a heat flux boundary via a programmable scanning electron beam controlled by the voltage waveform design method
A scanning electron beam can be used to construct heat flux boundaries (HFBs). However, the long current response time in the deflection coil using a current control method (CCM) cause the deviation of the current waveform, potentially reducing the accuracy of the reconstructed HFB relative to the t...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24014862 |
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| _version_ | 1850111875550806016 |
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| author | Minfeng Dou Xiyao Wang Hongxin Yao Linshuang Long Guozhu Zhao Hong Ye |
| author_facet | Minfeng Dou Xiyao Wang Hongxin Yao Linshuang Long Guozhu Zhao Hong Ye |
| author_sort | Minfeng Dou |
| collection | DOAJ |
| description | A scanning electron beam can be used to construct heat flux boundaries (HFBs). However, the long current response time in the deflection coil using a current control method (CCM) cause the deviation of the current waveform, potentially reducing the accuracy of the reconstructed HFB relative to the target HFB. The impact of the current response time on the reconstruction accuracy increases as the field frequency increases, and the accuracy can be reduced from 0.89 to 0.69. To shorten the current response time and improve the reconstruction accuracy, a voltage waveform design method (VWDM) is introduced as a replacement for the CCM. The result indicates that the accuracy of the HFB reconstructed by a scanning electron beam controlled by the VWDM can reach 0.91. Additionally, increasing the maximum output voltage of the power amplifier used to generate the voltage can further improve the reconstruction accuracy of the HFB with the VWDM. This study provides a new approach for the accurate construction of HFBs for rapid thermal processing, additive manufacturing and thermal assessment of hypersonic vehicles. |
| format | Article |
| id | doaj-art-eda55c3bf48c4d0aa7d656aa7791c075 |
| institution | OA Journals |
| issn | 2214-157X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-eda55c3bf48c4d0aa7d656aa7791c0752025-08-20T02:37:32ZengElsevierCase Studies in Thermal Engineering2214-157X2024-12-016410545510.1016/j.csite.2024.105455High-precision reconstruction of a heat flux boundary via a programmable scanning electron beam controlled by the voltage waveform design methodMinfeng Dou0Xiyao Wang1Hongxin Yao2Linshuang Long3Guozhu Zhao4Hong Ye5Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, 230026, ChinaChina Aerodynamics Research and Development Center, Mianyang, 621000, ChinaDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, 230026, ChinaDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, 230026, China; Corresponding author.China Aerodynamics Research and Development Center, Mianyang, 621000, China; Corresponding author.Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, 230026, China; Corresponding author.A scanning electron beam can be used to construct heat flux boundaries (HFBs). However, the long current response time in the deflection coil using a current control method (CCM) cause the deviation of the current waveform, potentially reducing the accuracy of the reconstructed HFB relative to the target HFB. The impact of the current response time on the reconstruction accuracy increases as the field frequency increases, and the accuracy can be reduced from 0.89 to 0.69. To shorten the current response time and improve the reconstruction accuracy, a voltage waveform design method (VWDM) is introduced as a replacement for the CCM. The result indicates that the accuracy of the HFB reconstructed by a scanning electron beam controlled by the VWDM can reach 0.91. Additionally, increasing the maximum output voltage of the power amplifier used to generate the voltage can further improve the reconstruction accuracy of the HFB with the VWDM. This study provides a new approach for the accurate construction of HFBs for rapid thermal processing, additive manufacturing and thermal assessment of hypersonic vehicles.http://www.sciencedirect.com/science/article/pii/S2214157X24014862Scanning electron beamHigh-precision reconstructionHeat flux boundaryCurrent response timeEnergy absorption |
| spellingShingle | Minfeng Dou Xiyao Wang Hongxin Yao Linshuang Long Guozhu Zhao Hong Ye High-precision reconstruction of a heat flux boundary via a programmable scanning electron beam controlled by the voltage waveform design method Case Studies in Thermal Engineering Scanning electron beam High-precision reconstruction Heat flux boundary Current response time Energy absorption |
| title | High-precision reconstruction of a heat flux boundary via a programmable scanning electron beam controlled by the voltage waveform design method |
| title_full | High-precision reconstruction of a heat flux boundary via a programmable scanning electron beam controlled by the voltage waveform design method |
| title_fullStr | High-precision reconstruction of a heat flux boundary via a programmable scanning electron beam controlled by the voltage waveform design method |
| title_full_unstemmed | High-precision reconstruction of a heat flux boundary via a programmable scanning electron beam controlled by the voltage waveform design method |
| title_short | High-precision reconstruction of a heat flux boundary via a programmable scanning electron beam controlled by the voltage waveform design method |
| title_sort | high precision reconstruction of a heat flux boundary via a programmable scanning electron beam controlled by the voltage waveform design method |
| topic | Scanning electron beam High-precision reconstruction Heat flux boundary Current response time Energy absorption |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24014862 |
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