Jet Noise Control by Nozzle Surface HF DBD Actuators

Kopiev, V. F.; Ostrikov, N. N.; Zaitsev, M. Yu.; Belyaev, I. V.; Bityurin, V. A.; Klimov, A. M.; Moralev, I. A.; Godin, S. M.

doi:10.2514/6.2011-911

Cited by 8 publications

(3 citation statements)

References 11 publications

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“…Some researchers have used plasma to inhibit airfoil flow separation, thereby reducing airfoil drag and increasing lift [27,28]. Meanwhile, the SDBD plasma has also been applied in turbine compressor stabilization and efficiency enhancement [29], and noise-canceling [30]. What is worth mentioning is that there are researchers in the world beginning to put plasma aerodynamic actuation into an application to reduce the drag coefficients of land vehicles in recent years.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Drag Reduction and Optimization of MIRA Model Based on Plasma Actuator

Lai

Can

et al. 2020

Actuators

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Active flow control of surface dielectric barrier discharge (SDBD) plasma is a technology that converts electrical energy into kinetic energy to achieve flow control. Its main application areas are concentrated in the aviation field. Undoubtedly, few studies have applied it in the field of automobile flow control. Meanwhile, during high-speed driving, there is a serious airflow separation phenomenon at the rear of notch-back cars, which brings a large area of negative pressure to the back of the cars. Due to the huge pressure difference between the front and end of the cars, it will increase the driving drag and fuel cost of the car. In this context, we seek to discuss the control effect on the airflow separation at the rear of the notch-back by using the phenomenological numerical simulation method of plasma flow control. Firstly, the plasma actuator is arranged separately on the rear end of the roof, c-pillar, upper and side of the trunk to study the control effect of airflow separation. After that, the plasma actuators at each position are combined and actuated simultaneously. We try to observe the control effect of airflow separation and select the combination with the best drag reduction effect. In the third stage, an efficient global optimization (EGO) algorithm based on kriging response surface is applied to optimize the supply voltage of the best combination that has been obtained before and obtain the driving voltage parameter of each actuator optimized under this combination. The results show that when plasma actuation is applied at four locations, only the actuation applied to the side of the luggage compartment has a significant drag reduction effect, while in other cases, the drag coefficient will increase. Specifically, drag reduction is better when the actuation is applied at four positions simultaneously. The maximum drag reduction coefficient of the car is reduced by 13.17%.

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Section: Introductionmentioning

confidence: 99%

Aerodynamic Drag Reduction and Optimization of MIRA Model Based on Plasma Actuator

Lai

Can

et al. 2020

Actuators

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“…Compared with DBD, RF discharge has advantages, such as stable volume discharge in high-speed airflow, and simple power tuning, which has drawn increasing attention for its potential application on both low and high speed flow control. [8][9][10][11][12][13] Leonov et al experimentally and theoretically investigated the dynamics of a single-electrode RF filament in supersonic airflow by means of optical emission spectrum and Schlieren visualization. It is revealed that the gas temperature in filamentary RF plasma can reach up to 4000 K at a static pressure of 120 Torr.…”

Section: Introductionmentioning

confidence: 99%

“…[11] RF discharge was also adopted in their experiments for flow control around wing model and jet noise control. [8][9][10][11][12][13] Dedrick investigated the electrical and optical characteristics of RF asymmetric surface barrier discharge plasma in atmospheric pressure air. [14,15] For practical purpose, the working altitude of plasma flow control is designed from 0 km to as high as 30 km, within which the static pressure changes influence RF discharge significantly.…”

Section: Introductionmentioning

confidence: 99%

Electric and plasma characteristics of RF discharge plasma actuation under varying pressures

et al. 2016

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The electric and plasma characteristics of RF discharge plasma actuation under varying pressure have been investigated experimentally. As the pressure increases, the shapes of charge-voltage Lissajous curves vary, and the discharge energy increases. The emission spectra show significant difference as the pressure varies. When the pressure is 1000 Pa, the electron temperature is estimated to be 4.139 eV, the electron density and the vibrational temperature of plasma are 4.71×10 11 cm −3 and 1.27 eV, respectively. The ratio of spectral lines I peak 391.4 /I peak 380.5 which describes the electron temperature hardly changes when the pressure varies between 5000-30000 Pa, while it increases remarkably with the pressure below 5000 Pa, indicating a transition from filamentary discharge to glow discharge. The characteristics of emission spectrum are obviously influenced by the loading power. With more loading power, both of the illumination and emission spectrum intensity increase at 10000 Pa. The pin-pin electrode RF discharge is arc-like at power higher than 33 W, which results in a macroscopic air temperature increase.

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Elements of Compressible Flow Control

Gatski¹,

Bonnet²

2013

Compressibility, Turbulence and High Speed Flow

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Jet Noise Control by Nozzle Surface HF DBD Actuators

Cited by 8 publications

References 11 publications

Aerodynamic Drag Reduction and Optimization of MIRA Model Based on Plasma Actuator

Aerodynamic Drag Reduction and Optimization of MIRA Model Based on Plasma Actuator

Electric and plasma characteristics of RF discharge plasma actuation under varying pressures

Elements of Compressible Flow Control

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