Development of an Analytical SparkJet Model

Haack, Sarah; Taylor, Trent; Emhoff, Jerry; Cybyk, Bohdan

doi:10.2514/6.2010-4979

Cited by 58 publications

(27 citation statements)

References 8 publications

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“…Among these, discharge energy has a dominant influence on PSJA performance [14][15][16]. With increasing discharge energy, peak jet velocity, jet duration time, pulsed thrust (impulse), and jet-affected area, increase respectively.…”

Section: Introductionmentioning

confidence: 99%

“…With increasing discharge energy, peak jet velocity, jet duration time, pulsed thrust (impulse), and jet-affected area, increase respectively. The induced flow field features change from appearance of only weak shock waves without jet (low energy) to the coexistence of strong shock waves, strong jet and a train of vortex rings (high energy) [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterisation of plasma synthetic jet actuators in quiescent flow

Zong¹,

Kotsonis²

2016

J. Phys. D: Appl. Phys.

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“…Evolution of the jet inside boundary layer is clearly presented. These results revealed that the SPSJ actuator is a promising and satisfying for the AFC application 02104-p. 4 but we haven't enough qualified equipment such as high speed Schlieren system in order to make a precise measurement of this developed actuator.…”

Section: Discussionmentioning

confidence: 99%

“…Respectively, these are referred to as energy deposition, gas discharge and recovery. Moreover, the PSJ actuator can be classified as a two electrode [3, 5 and 6] and a threeelectrode PSJ actuator [4,7]. Explanations of these steps will be comprehensively explained in the section 2.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the duty cycle on the spark-plug plasma synthetic jet actuator

Seyhan

Akansu

Karakaya

et al. 2016

EPJ Web of Conferences

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Abstract.A promising novel actuator called Spark-Plug Plasma Synthetic Jet (SPSJ) has been developed in Atmospheric Plasma Research Laboratory at Ni÷de University. It generates electrothermally high synthetic jet velocity by using high voltage. SPSJ actuator can be utilized to be an active flow control device having some advantages such as no moving parts, low energy consumption and easy to integrate the system. This actuator consists of two main components: semi-surface spark plug (NGK BUHW) as an anode electrode and a cap having an orifice as a cathode electrode. The cap, having a jet exit orifice diameter of 2 mm, has diameter of 4.4 mm and height of 4.65 mm. This study presents the characteristics of SPSJ actuator by using the hot wire anemometer in order to approximately determine jet velocity in quiescent air. Peak velocity as high as 180 m/s was obtained for f e = 100 and duty cycle 50%. The flow visualization indicated that the actuator's jet velocity is enough to penetrate the developed boundary layer.

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