Arc Diameter Estimation of a Rotating Gliding Arc Using a Simple High-Speed Camera and 'Gaussian Fit' Function

Ananthanarasimhan, J and Raghuram, A and Rao, L (2022) Arc Diameter Estimation of a Rotating Gliding Arc Using a Simple High-Speed Camera and 'Gaussian Fit' Function. In: IEEE Transactions on Plasma Science, 50 (6). pp. 1401-1406.

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Abstract

This work reports the estimation of discharge diameter (dd) using 'Gaussian fit' method applied on the discharge's image captured using high-speed camera (HSC). Work was conducted in a rotating gliding arc (RGA) and obtained the dd near the shortest (δ) and longest (Δ) gap between the electrodes, operated under 5 SLPM (transitional) and 50 SLPM (turbulent) flow rates of argon gas at atmospheric conditions. Gaussian fit was verified to be suitable to estimate the thickness of the objects that could be well differentiated from the background in the captured image. Furthermore, the results indicated that the gas flow rate is highly influential on dd. The average dd was thinned by ≈28%, from 0.29 to 0.21 mm, when the flow rate was increased from 5 to 50 SLPM, indicating the influence of turbulent eddies at 50 SLPM. The dd was varying along the discharge length under turbulent flow due to discharge's inhomogeneity in intensity arising due to twisting, curling, and knot formations. This work marks an essential step toward the characterization of the RGA reactor.

Item Type:	Journal Article
Publication:	IEEE Transactions on Plasma Science
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Atmospheric movements; Electric arcs; Flow of gases; Gaussian distribution; High speed cameras, Diameter estimation; Discharge (electric); Discharge diameter; Gaussian fits; Gliding arc; High speed imaging; High-speed cameras; Rotating gliding arc .; Simple++; Spatial resolution, Electrodes
Department/Centre:	Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA)
Date Deposited:	21 Sep 2022 09:45
Last Modified:	21 Sep 2022 09:45
URI:	https://eprints.iisc.ac.in/id/eprint/76930

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