Document Type
Article
Author ORCID Identifier
Xiankang Wang https://orcid.org/0000-0003-0260-8389
Xiangen Zhao https://orcid.org/0000-0002-8476-2103
Journal/Book Title/Conference
High Voltage
Volume
7
Issue
5
Publisher
The Institution of Engineering and Technology
Publication Date
6-23-2022
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
First Page
825
Last Page
839
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.
Recommended Citation
He, Junjia; Wang, Xiankang; Zhao, Xiangen; Lee, Juhyeong; Du, Yaping; Liu, Xiaopeng; Gan, Quan; Liu, Yang; and Liao, Yuqin, "Schlieren Techniques for Observations of Long Positive Sparks: Review and Application" (2022). Mechanical and Aerospace Engineering Faculty Publications. Paper 205.
https://digitalcommons.usu.edu/mae_facpub/205
Comments
Publication published by The Institution of Engineering and Technology in High Voltage vol. 7.