Influence of the discharge location on the performance of a three-electrode plasma synthetic jet actuator

Zhang, Zhibo; Wu, Yun; Jia, Ming; Zong, Haohua; Cui, Wei; Liang, Hua; Li, Yinghong

doi:10.1016/j.sna.2015.09.019

Cited by 22 publications

(11 citation statements)

References 20 publications

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“…As shown in Fig. 4, compared with the traditional discharge process [24] , there is an obvious breakdown stage in the discharge process. At 700 ns, breakdown happens in all electrode gaps.…”

Section: Working Process Of the Multichannel Discharge Circuitmentioning

confidence: 95%

The multichannel discharge plasma synthetic jet actuator

Zhang

Jia

et al. 2017

Sensors and Actuators A: Physical

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent repository link Abstract:The plasma synthetic jet actuator (PSJA) is a flow control device capable of generating high speed pulsed jet. However, the performance of conventional PSJA is restricted by low discharge efficiency and small control area, because one power supply only drives one electrode couple. The present work is to propose a new concept of multichannel discharge plasma synthetic jet actuator (MD-PSJA), which is driven by single power supply. The new MD-PSJA has two types, namely the multi-electrode PSJA and the multi-PSJA array. These two types of MD-PSJA are examined experimentally. The multi-electrode PSJA containing 11-electrode PSJA is first studied. Comparison with standard 2-electrode PSJA reveals that the discharge efficiency and jet velocity increase 200% and 47% respectively under the same input energy and discharge voltage. The multi-PSJA array is later evaluated. One power supply is found to be able to drive an array of 12 PSJAs, resulting in 6 times affected area and 64% jet velocity of a conventional PSJA. The proposed MD-PSJA is finally concluded an improved active flow control actuator in high speed applications.

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Section: Working Process Of the Multichannel Discharge Circuitmentioning

confidence: 95%

The multichannel discharge plasma synthetic jet actuator

Zhang

Jia

et al. 2017

Sensors and Actuators A: Physical

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“…With the energy deposition kept constant and the electrode distance increasing, the jet duration time and the peak jet velocity improve significantly due to the augmented heating volume [33]. Discharge location near the exit leads to a stronger oscillation of the exit velocity but shorter duty cycle, compared with discharge location far from the exit [34]. Additionally, the exit throat length has no influence on the single-pulse performance of PSJA, while the repetitive working performance is inversely proportional to the throat length.…”

Section: /25mentioning

confidence: 99%

Characterisation of plasma synthetic jet actuators in quiescent flow

Zong¹,

Kotsonis²

2016

J. Phys. D: Appl. Phys.

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An experimental characterisation study of a large-volume three-electrode Plasma Synthetic Jet Actuator (PSJA) is presented. A sequential discharge power supply system is used to activate the PSJA. Phase-locked planar Particle Image Velocimetry (PIV) and time-resolved Schlieren imaging are used to characterise the evolution of the induced flow field in quiescent flow conditions. The effect of orifice diameter is investigated. Results indicate three distinct features of the actuator-induced flow field. These are the initial shock waves, the high speed jet and vortex rings. Two types of shock waves with varied intensities, namely a strong shock wave and a weak shock wave, are issued from the orifice shortly after the ignition of the discharge.. Subsequently, emission of a high speed jet is observed, reaching velocities up to 130 m/s. Pronounced oscillation of the exit velocity is caused by the periodical behaviour of capacitive discharge, which also lead to the formation of vortex ring trains. Orifice diameter has no influence on the jet acceleration stage and the peak exit velocity. However, a large orifice diameter results in a rapid decline of exit velocity and thus a short jet duration time. Vortex ring propagation velocities are measured at peak values ranging from 55 m/s to 70 m/s. In the case of 3 mm orifice diameter, trajectory of the vortex ring severely deviates from the actuator axis of symmetry. The development of this asymmetry in the flow field is attributed to asymmetry in the electrode configuration.

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“…This variation is directly related to the mechanical energy dissipation due to the arcinduced shock waves. When the discharge location moves from the cavity bottom towards the actuator exit, jet duration time decreases but strong temporal oscillations of the exit velocity are observed, possibly due to the enhanced shock wave reflections (Zhang et al 2015). Electrode shape can affect the impedance matching of the discharge circuit, and a large length-to-diameter ratio of electrodes results in a high cut-off working frequency (Popkin et al 2013b).…”

Section: Introductionmentioning

confidence: 99%

“…Throat length has no influence on the single-pulse performance of PSJA (peak jet velocity, pulsed thrust etc. ), but a long throat length has detrimental effects on the repetitive working performance of PSJA at high frequency (Zhang et al 2015).…”

Section: Introductionmentioning

confidence: 99%