Thermal Fluctuation Characteristics around a Nanosecond Pulsed Dielectric Barrier Discharge Plasma Actuator using a Frequency Analysis based on Schlieren Images

Takahiro Ukai and Konstantinos Kontis
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Takahiro Ukai: Department of Mechanical Engineering, Osaka Institute of Technology, Osaka 535-8585, Japan
Konstantinos Kontis: James Watt School of Engineering, University of Glasgow, Glasgow G12 8QQ, UK

Energies, 2020, vol. 13, issue 3, 1-15

Abstract: A thermal fluctuation driven by a burst plasma discharge is experimentally investigated using a frequency analysis based on the Schlieren images. The burst plasma discharge is controlled by an interval frequency f int = 200 Hz and a pulse frequency f B = 3.6 kHz as well as the duration time of the burst event: T on . A burst feature is defined as a burst ratio BR = T on/ (1/f int ) . The burst plasma discharge generates a burst-induced hot plume growing above a ground electrode. In a high burst ratio, which is BR = 0.45 and 0.57, the burst-induced hot plume is formed as a wave thermal pattern that is mainly fluctuated at the interval frequency of 200 Hz. Additionally, a maximum fluctuation spot of 200 Hz appears near the edge of an exposed electrode in a low burst ratio, whereas it moves towards the ground electrode in the high burst ratio. The possible scenario is that a relatively strong ionic wind and/or an induced jet generated in the high burst ratio might cause the movement of the maximum fluctuation spot.

Keywords: thermal fluctuation; hot plume; ns-DBD plasma actuator; frequency analysis; flow control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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