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Sessile water droplets on insulating surfaces subject to high AC stress effect of contact angle

Crichton, B.H. and Fouracre, R.A. and Gouda, H.A. and Stickland, M.T. (2002) Sessile water droplets on insulating surfaces subject to high AC stress effect of contact angle. In: Proceedings of the Universities' on Power Engineering Conference, UPEC 2002. IEEE. ISBN 1-904133-07-X

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Abstract

Surface pollution of outdoor high-voltage insulators is an important cause of flashover. We have undertaken an experimental study of electrical breakdown at the edges of a sessile water droplet on a planar, polymeric, insulating surface when subject to AC stress, parallel to the insulator surface, up to 2MV/m. The static contact angle between droplet and surface was varied by controlling the physical properties of the droplet and by inclining the insulator plane from the horizontal. The partial discharge activity from the water droplet was investigated using a combination of high-speed video camera, operated at up to 3,000 frames per second, and an electrical partial discharge detection system. We have used this to examine the location of partial discharge at the edges of the water droplet.

Item type: Book Section
ID code: 7442
Keywords: surface pollution, fluid dynamics, water, pumps, droplets, Mechanical engineering and machinery
Subjects: Technology > Mechanical engineering and machinery
Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Faculty of Engineering > Electronic and Electrical Engineering
Unknown Department
Depositing user: Strathprints Administrator
Date Deposited: 27 Jan 2009 15:19
Last modified: 21 May 2015 18:40
Related URLs:
URI: http://strathprints.strath.ac.uk/id/eprint/7442

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