Noise control of a flow around a cylinder using high-frequency dielectric barrier discharge plasma actuators

Kopiev, V. F.; Belyaev, I. V.; Zaytsev, M. Yu.; Kazansky, Pavel; Moralev, I. A.

doi:10.1134/s1063771015010078

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…This paper extends the results reported in [35] for actuator efficiency dependence from different operation parameters (energy release, forcing frequency, duty cycle, electrode location). It was demonstrated that actuator efficiency can be appreciably increased as compared with results achieved in [35] by optimization of the location of actuator electrodes and operation conditions. Experiments have shown that there are optimal parameters for amplitude, frequency and duty cycle of applied voltage and the most optimal location of the electrodes.…”

Section: Introductionsupporting

confidence: 85%

“…The paper [14] deals with the problem of control of instability waves in turbulent jets and expose the direction of further research in the field of application of plasma actuators to the problem of jet noise mitigation by means of close-loop active control system, because instability waves in the shear layer of turbulent jet are believed to be an important source of jet noise for aircraft engine. In [35] it was reported that HF DBD actuator allows to decrease acoustical noise level of cylinder in cross-flow with velocity up to 80 m s −1 for value about 3.5 dB at spectral maximum range. The aim of that work was investigation of HF DBD actuator noise control authority for flow velocity which is of interest for a practical application (for example aircraft approach speed).…”

Section: Introductionmentioning

confidence: 99%

“…The aim of that work was investigation of HF DBD actuator noise control authority for flow velocity which is of interest for a practical application (for example aircraft approach speed). Due to considerable interest to use plasma actuators for the aircraft landing speed the result [35] requires more careful investigation.…”

Section: Introductionmentioning

confidence: 99%

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HF DBD plasma actuators for reduction of cylinder noise in flow

Kopiev

Kazansky

Moralev

et al. 2017

J. Phys. D: Appl. Phys.

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Surface high frequency dielectric barrier discharge (HF DBD) was used to reduce flow-induced noise, radiated by circular cylinder in cross flow. Effect of HF DBD actuators is studied for flow velocity up to 80 m s−1 (Reynolds numbers up to 2.18 · 105), corresponding to the typical aircraft landing approach speed. Noise measurements were performed by microphone array in anechoic chamber; averaged flow parameters were studied by particle image velocimetry (PIV). Actuator was powered by high-frequency voltage in hundreds kHz range in steady or modulated mode with the modulation frequency of 0.3–20 kHz (Strouhal number St of 0.4 to 20). It is demonstrated that upstream directed plasma actuators are able to reduce the vortex noise of a cylinder by 10 dB. Noise reduction is accompanied by significant reorganization of the wake behind a cylinder, decreasing both wake width and turbulence level. The physical mechanism related to broadband noise control by HF DBD actuator is also discussed.

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Section: Introductionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

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HF DBD plasma actuators for reduction of cylinder noise in flow

Kopiev

Kazansky

Moralev

et al. 2017

J. Phys. D: Appl. Phys.

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“…In this work, plasma actuators have been used to reduce the energy of perturbations generated by surface roughness, by up to 70%, in three different geometries. Moralev et al [56,144,156] reported generation of boundary layer perturbations using constricted RF SDBD discharges. It was shown that these perturbations are inherently 3D.…”

Section: Effect Of Perturbations Produced By Sdbd Discharges On Exter...mentioning

confidence: 99%

Dynamics of near-surface electric discharges and mechanisms of their interaction with the airflow

Leonov

Adamovich

Soloviev

2016

Plasma Sources Sci. Technol.

180

143

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The main focus of the review is on dynamics and kinetics of near-surface discharge plasmas, such as surface dielectric barrier discharges sustained by AC and repetitively pulsed waveforms, pulsed DC discharges, and quasi-DC discharges, generated in quiescent air and in the airflow. A number of technical issues related to plasma flow control applications are discussed in detail, including discharge development via surface ionization waves, charge transport and accumulation on dielectric surface, discharge contraction, different types of flow perturbations generated by surface discharges, and effect of high-speed flow on discharge dynamics. In the first part of the manuscript, plasma morphology and results of electrical and optical emission spectroscopy measurements are discussed. Particular attention is paid to dynamics of surface charge accumulation and dissipation, both in diffuse discharges and during development of ionization instabilities resulting in discharge contraction. Contraction leads to significant increase of both the surface area of charge accumulation and the energy coupled to the plasma. The use of alternating polarity pulse waveforms accelerates contraction of surface dielectric barrier discharges and formation of filamentary plasmas. The second part discusses the interaction of discharge plasmas with quiescent air and the external airflow. Four major types of flow perturbations have been identified: (1) low-speed near-surface jets generated by electrohydrodynamic interaction (ion wind); (2) spanwise and streamwise vortices formed by both electrohydrodynamic and thermal effects; (3) weak shock waves produced by rapid heating in pulsed discharges on sub-microsecond time scale; and (4) nearsurface localized stochastic perturbations, on sub-millisecond time, detected only recently. The mechanism of plasma-flow interaction remains not fully understood, especially in filamentary surface dielectric barrier discharges. Localized quasi-DC surface discharges sustained in a high-speed flow are discussed in the third part of the review. Although dynamics of this type of the discharge is highly transient, due to its strong interaction with the flow, the resultant flow structure is stationary, including the oblique shock and the flow separation region downstream of the discharge. The oblique shock is attached to a time-averaged, wedge-shaped, near-wall plasma layer, with the shock angle controlled by the discharge power, which makes possible changing the flow structure and parameters in a controlled way. Finally, unresolved and openended issues are discussed in the summary.

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