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Jet Characteristics of Pulsed Arc SparkJet Actuator and Performance Improvement with Dual-Spark Pulses

Jet Characteristics of Pulsed Arc SparkJet Actuator and Performance Improvement with Dual-Spark... Performance characteristics of the jet produced by SparkJet actuator are investigated with a numerical simulation. The spark discharge is considered as a uniform heat source in energy equation modeled with a user-defined function in Fluent. The SparkJet actuator is tested with both single-spark pulse and dual-spark pulses. Validation with experiments for a single 50 mJ spark pulse shows that Joule heating factor for the heat source term is about 5%. Jet velocity increases and total impulse decreases with the distance of the spark from the exit orifice. Peak velocity and peak thrust increase with the volume of the spark discharge. Total impulse increases as the time delay between two temporally separated pulses increases. Spatially separated dual-spark pulses produce higher jet velocity as the time delay between the pulses increases. Performance testing of jets in various operating modes informs that the SparkJet actuator is more efficient and effective when spatiotemporally separated dual-spark pulses are turned on in downstroke operation with an adequate time delay between pulses. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Aeronautical and Space Sciences Springer Journals

Jet Characteristics of Pulsed Arc SparkJet Actuator and Performance Improvement with Dual-Spark Pulses

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References (33)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to The Korean Society for Aeronautical & Space Sciences 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
2093-274X
eISSN
2093-2480
DOI
10.1007/s42405-023-00571-x
Publisher site
See Article on Publisher Site

Abstract

Performance characteristics of the jet produced by SparkJet actuator are investigated with a numerical simulation. The spark discharge is considered as a uniform heat source in energy equation modeled with a user-defined function in Fluent. The SparkJet actuator is tested with both single-spark pulse and dual-spark pulses. Validation with experiments for a single 50 mJ spark pulse shows that Joule heating factor for the heat source term is about 5%. Jet velocity increases and total impulse decreases with the distance of the spark from the exit orifice. Peak velocity and peak thrust increase with the volume of the spark discharge. Total impulse increases as the time delay between two temporally separated pulses increases. Spatially separated dual-spark pulses produce higher jet velocity as the time delay between the pulses increases. Performance testing of jets in various operating modes informs that the SparkJet actuator is more efficient and effective when spatiotemporally separated dual-spark pulses are turned on in downstroke operation with an adequate time delay between pulses.

Journal

International Journal of Aeronautical and Space Sciences – Springer Journals

Published: Apr 1, 2023

Keywords: Plasma flow control; Plasma actuator; SparkJet; Pulsed arc

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