Schlieren techniques for observations of long positive sparks: Review and application
Abstract Understanding the mechanism of positive leader discharge is important in lightning protection engineering and the external insulation design in high voltage power transmission systems. During the propagation of a positive leader, some processes without light‐emitting, for example, the insul...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-10-01
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| Series: | High Voltage |
| Online Access: | https://doi.org/10.1049/hve2.12225 |
| _version_ | 1811250845738598400 |
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| author | Junjia He Xiankang Wang Xiangen Zhao Juhyeong Lee Yaping Du Xiaopeng Liu Quan Gan Yang Liu Yuqin Liao |
| author_facet | Junjia He Xiankang Wang Xiangen Zhao Juhyeong Lee Yaping Du Xiaopeng Liu Quan Gan Yang Liu Yuqin Liao |
| author_sort | Junjia He |
| collection | DOAJ |
| description | Abstract Understanding the mechanism of positive leader discharge is important in lightning protection engineering and the external insulation design in high voltage power transmission systems. During the propagation of a positive leader, some processes without light‐emitting, for example, the insulation recovery process after the breakdown, cannot be observed by optical photography techniques. With the combination of the digital high‐speed imaging system, the conventional Schlieren techniques offer new vistas in the long air gap discharge observation. The important features of high spatial resolution, high sensitivity, and easy arrangement make Schlieren techniques powerful and effective tools for characterising the discharge processes without light‐emitting. This work presents a brief review of current Schlieren techniques and discusses the design of the Schlieren optics system for long spark observations. Several interesting phenomena discovered at different phases of long sparks with high‐speed Schlieren techniques are also presented. |
| first_indexed | 2024-04-12T16:10:50Z |
| format | Article |
| id | doaj.art-39d4eb271ed645fb9566ea70a962d2c5 |
| institution | Directory Open Access Journal |
| issn | 2397-7264 |
| language | English |
| last_indexed | 2024-04-12T16:10:50Z |
| publishDate | 2022-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | High Voltage |
| spelling | doaj.art-39d4eb271ed645fb9566ea70a962d2c52022-12-22T03:25:54ZengWileyHigh Voltage2397-72642022-10-017582583910.1049/hve2.12225Schlieren techniques for observations of long positive sparks: Review and applicationJunjia He0Xiankang Wang1Xiangen Zhao2Juhyeong Lee3Yaping Du4Xiaopeng Liu5Quan Gan6Yang Liu7Yuqin Liao8State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan ChinaState Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan ChinaState Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan ChinaDepartment of Mechanical and Aerospace Engineering Utah State University Logan Utah USADepartment of Building Environment and Energy Engineering Hong Kong Polytechnic University Kowloon ChinaState Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan ChinaState Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan ChinaState Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan ChinaState Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan ChinaAbstract Understanding the mechanism of positive leader discharge is important in lightning protection engineering and the external insulation design in high voltage power transmission systems. During the propagation of a positive leader, some processes without light‐emitting, for example, the insulation recovery process after the breakdown, cannot be observed by optical photography techniques. With the combination of the digital high‐speed imaging system, the conventional Schlieren techniques offer new vistas in the long air gap discharge observation. The important features of high spatial resolution, high sensitivity, and easy arrangement make Schlieren techniques powerful and effective tools for characterising the discharge processes without light‐emitting. This work presents a brief review of current Schlieren techniques and discusses the design of the Schlieren optics system for long spark observations. Several interesting phenomena discovered at different phases of long sparks with high‐speed Schlieren techniques are also presented.https://doi.org/10.1049/hve2.12225 |
| spellingShingle | Junjia He Xiankang Wang Xiangen Zhao Juhyeong Lee Yaping Du Xiaopeng Liu Quan Gan Yang Liu Yuqin Liao Schlieren techniques for observations of long positive sparks: Review and application High Voltage |
| title | Schlieren techniques for observations of long positive sparks: Review and application |
| title_full | Schlieren techniques for observations of long positive sparks: Review and application |
| title_fullStr | Schlieren techniques for observations of long positive sparks: Review and application |
| title_full_unstemmed | Schlieren techniques for observations of long positive sparks: Review and application |
| title_short | Schlieren techniques for observations of long positive sparks: Review and application |
| title_sort | schlieren techniques for observations of long positive sparks review and application |
| url | https://doi.org/10.1049/hve2.12225 |
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