Low-speed gas knife protection for the large aperture optical component in high-power laser systems
In high-power laser systems, fused silica aerosols produced by laser-induced damage to optical components impede further improvement in operation efficiency. To mitigate aerosol threats, low-speed gas knives are an attractive online option. Herein, we investigate the protective mechanism of a low-sp...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2023.1061541/full |
| _version_ | 1797948143951675392 |
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| author | Ge Peng Qiang Gao Qiang Gao Zhe Dong Jiaxuan Chen Peng Zhang Peng Zhang Lihua Lu Lihua Lu |
| author_facet | Ge Peng Qiang Gao Qiang Gao Zhe Dong Jiaxuan Chen Peng Zhang Peng Zhang Lihua Lu Lihua Lu |
| author_sort | Ge Peng |
| collection | DOAJ |
| description | In high-power laser systems, fused silica aerosols produced by laser-induced damage to optical components impede further improvement in operation efficiency. To mitigate aerosol threats, low-speed gas knives are an attractive online option. Herein, we investigate the protective mechanism of a low-speed gas knife (<20 m/s) against aerosol invasion on the optical component. First, aerosol particles invaded the surface experimentally in two ways and were detected both in the core and non-core regions, depending on the coverage area of the protection flow. Particle sedimentation percentages can directly reflect the protection capability of the gas knife flow. Since a “midstream defect” is readily apparent, a CFD model was developed to explain the phenomenon from the perspective of velocity distribution. Additionally, the Euler-Lagrange method was used to track airflow particle motions and reappear the protective process. The numerical and experimental results on protection efficiency are closely correlated. The numerical calculation indicates that the “midstream defect” manifested in the core region is possibly attributed to the turbulent dispersion and anisotropic near-wall effects of particles of various diameters, while in the non-core region, the mechanism differs. This work provides a framework for airflow clean designs inside high-power laser systems. |
| first_indexed | 2024-04-10T21:38:51Z |
| format | Article |
| id | doaj.art-18ac45e645804d36bc4096fcb763a30d |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-04-10T21:38:51Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-18ac45e645804d36bc4096fcb763a30d2023-01-19T07:11:56ZengFrontiers Media S.A.Frontiers in Physics2296-424X2023-01-011110.3389/fphy.2023.10615411061541Low-speed gas knife protection for the large aperture optical component in high-power laser systemsGe Peng0Qiang Gao1Qiang Gao2Zhe Dong3Jiaxuan Chen4Peng Zhang5Peng Zhang6Lihua Lu7Lihua Lu8Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, ChinaCenter for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, ChinaChongqing Research Institute of Harbin Institute of Technology, Chongqing, ChinaCenter for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, ChinaCenter for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, ChinaCenter for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, ChinaChongqing Research Institute of Harbin Institute of Technology, Chongqing, ChinaCenter for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, ChinaChongqing Research Institute of Harbin Institute of Technology, Chongqing, ChinaIn high-power laser systems, fused silica aerosols produced by laser-induced damage to optical components impede further improvement in operation efficiency. To mitigate aerosol threats, low-speed gas knives are an attractive online option. Herein, we investigate the protective mechanism of a low-speed gas knife (<20 m/s) against aerosol invasion on the optical component. First, aerosol particles invaded the surface experimentally in two ways and were detected both in the core and non-core regions, depending on the coverage area of the protection flow. Particle sedimentation percentages can directly reflect the protection capability of the gas knife flow. Since a “midstream defect” is readily apparent, a CFD model was developed to explain the phenomenon from the perspective of velocity distribution. Additionally, the Euler-Lagrange method was used to track airflow particle motions and reappear the protective process. The numerical and experimental results on protection efficiency are closely correlated. The numerical calculation indicates that the “midstream defect” manifested in the core region is possibly attributed to the turbulent dispersion and anisotropic near-wall effects of particles of various diameters, while in the non-core region, the mechanism differs. This work provides a framework for airflow clean designs inside high-power laser systems.https://www.frontiersin.org/articles/10.3389/fphy.2023.1061541/fullfused silicaairflow (AF)particleair knifehigh-power laser systemcleanliness |
| spellingShingle | Ge Peng Qiang Gao Qiang Gao Zhe Dong Jiaxuan Chen Peng Zhang Peng Zhang Lihua Lu Lihua Lu Low-speed gas knife protection for the large aperture optical component in high-power laser systems Frontiers in Physics fused silica airflow (AF) particle air knife high-power laser system cleanliness |
| title | Low-speed gas knife protection for the large aperture optical component in high-power laser systems |
| title_full | Low-speed gas knife protection for the large aperture optical component in high-power laser systems |
| title_fullStr | Low-speed gas knife protection for the large aperture optical component in high-power laser systems |
| title_full_unstemmed | Low-speed gas knife protection for the large aperture optical component in high-power laser systems |
| title_short | Low-speed gas knife protection for the large aperture optical component in high-power laser systems |
| title_sort | low speed gas knife protection for the large aperture optical component in high power laser systems |
| topic | fused silica airflow (AF) particle air knife high-power laser system cleanliness |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2023.1061541/full |
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