Dielectric barrier discharge actuator for vehicle drag reduction at highway speeds

Roy, Subrata; Zhao, Peng; Dasgupta, Arnob; Soni, J.

doi:10.1063/1.4942979

Cited by 34 publications

(32 citation statements)

References 19 publications

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“…The truck model was attached to an active flow control device to modify the flow of air in the regions covering the front and rear wheels and the underbody of truck. The Active Flow Control device employed for investigation was a Single Dielectric Barrier Discharge Plasma Actuator (SDBD) Roy, et al (2016) implanted on the side of the truck which runs vertically as two individual units on both the sides, intended to perform the function of side skirt. The The SDBD is embodied of a dielectric medium with two electrodes etched on the top and bottom layer of the dielectric of which the bottom electrode should be an encapsulated with a kapton tape and the top one as an exposed electrode.…”

Section: 3 Design Of Active Side Skirtmentioning

confidence: 99%

“…Moreau (2007) had reported that the electric winds created by the plasma formation on the DBD plasma actuator directed span wise manipulated the surrounding air with less input power and suggested that plasma should act at the right time and location. Roy et al (2016) demonstrated the, use of plasma actuator for reducing the base drag and achieved 10 % reduction in aerodynamic drag at speed of 31.21 m/s for a scaled tractor-trailer model, but the power needed to actuate the plasma actuator was 4.5 times more than power saved, so there arises a need to design an efficient plasma actuator which is on par with the passive flow control devices with the aim of reducing drag. The dielectric barrier discharges based plasma actuators that had been created are with AC HV supply and had been presented by (Yokoyama et al 1990 andFridman et al 2005).…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation and ANN Prediction on the Underbody Drag Minimization in Truck Model using DC Pulsed DBD Plasma Actuator as an Active Flow Control Device

Jeyangel¹,

Jancirani²

2019

JAFM

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Copious researches have been accomplished in the realm of automotive aerodynamics leading to the reduction of drag in cars, trucks and buses. The overwhelming results have further spearheaded the present work in emphasizing the underbody drag minimization of distribution trucks using plasma actuator as an active flow control technique. Four different types of plasma actuators also called Active Side Skirt were experimentally evaluated on the scale down model of truck in a subsonic wind tunnel along with five different voltages ranging from 12 kV to 28 kV. The plasma actuator was positioned on the sides of the truck vertically as four individual units covering the front tyres and rear tyres. The results exhibit that the plasma actuator with a larger insulated electrode and with an electrode overlap distance had a good drag reduction rate of 8% at higher velocity (28 kV).The plasma generated by the Active Side Skirt induces an ionic wind along the stream wise direction keeping the flow attached throughout thereby helping in a reduced drag. An artificial neural network was developed using the data from the experimental analysis with Voltage, Velocity, Top width, Bottom width and Overlap distance as input parameter for training the network, further coefficient of drag taken as output parameter. A total of two hidden layers and seven neurons was used for the prediction. The test data that was not used for training, correlated with the ANN predicted value furthermore with the experimental values.

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Section: 3 Design Of Active Side Skirtmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Investigation and ANN Prediction on the Underbody Drag Minimization in Truck Model using DC Pulsed DBD Plasma Actuator as an Active Flow Control Device

Jeyangel¹,

Jancirani²

2019

JAFM

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“…Recent studies on numerical modeling of DBD plasma actuators present the effects of DBD actuators on the flow over geometries such as an airfoil and a backward step . The analysis of quiescent flow and with freestream flow presents the charge density and discharge current variation along with instantaneous charge and velocity distribution plots.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies on numerical modeling of DBD plasma actuators present the effects of DBD actuators on the flow over geometries such as an airfoil and a backward step. 1,3,16,22 The analysis of quiescent flow 23 and with freestream flow 18 presents the charge density and discharge current variation along with instantaneous charge and velocity distribution plots. An experimental analysis of quiescent flow and flow control with plasma actuators, for an annular electrode, 24 was presented including velocity profiles of freestream flow along with the evolution of quiescent flow.…”

mentioning

confidence: 99%

A plasma‐fluid model for EHD flow in DBD actuators and experimental validation

Mushyam

Rodrigues

Páscoa

2019

Numerical Methods in Fluids

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Summary A numerical method to simulate plasma induced electrohydrodynamic flow is proposed in this study. The numerical model consists of three components. Firstly, a potential module to simulate temporal potential and electric field generated in the ionized fluid. Secondly, a plasma module to simulate plasma development and charge particle densities. Finally, a fluid module to simulate the flow affected by the body forces induced by the movement of the charged particles. Fluid flow is modeled using modified predictor‐corrector strategy as proposed in the marker and cell method. The velocity field was corrected to achieve incompressible flow by calculating pressure correction factors, considered in all cells. Numerical convergence and time sensitivity analysis were carried to confirm grid independence and determine an efficient time step for simulations. Numerical computations are validated by comparing with experimental results of discharge currents and current densities. They were found to be in very good agreement thus providing an extensive validation. Furthermore, quiescent flow over a dielectric barrier discharge actuator is simulated in the this study, using the proposed plasma‐fluid model, to model flow evolution and resolve temporal flow features for detailed analysis. The streamline and vorticity plots were analyzed and compared with experimental results, and flow results were found to be in‐line with the experiments.

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“…Dielectric barrier discharge (DBD) plasma actuators are promising devices for flow control that can be applied to a number of scenarios: flow separation postponement, turbulence augmentation, drag reduction, and lift enhancement. Many numerical and experimental investigations have shown the effectiveness of DBD plasma actuators for engineering applications; such as film cooling [1,2], aircraft wing [3][4][5], and ground vehicles [6,7]. The experiment of Benard et al [8] demonstrated that the DBD plasma actuator placed on a NACA0015 aircraft wing delays the onset of stall by one or two degrees and achieved approximately 30% drag reduction at a 15 degree incidence.…”

Section: Introductionmentioning

confidence: 99%

Temporal variation of the spatial density distribution above a nanosecond pulsed dielectric barrier discharge plasma actuator in quiescent air

et al. 2018

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The thermal perturbation caused by a nanosecond pulsed dielectric barrier discharge (ns-DBD) plasma actuator may lead to boundary layer transition. Hence, understanding of the thermal flow induced by the ns-DBD plasma actuator will contribute to the development of an efficient flow control device for various engineering applications. In this study, the spatial density distribution related to the thermal flow was experimentally investigated using both qualitative and quantitative schlieren techniques. The focus of this study is to understand the initial temporal variation of the spatial density distribution above the ns-DBD plasma actuator in quiescent air. The quantitative visualisation showed that a hot plume is generated from the edge of the exposed electrode and moves slightly towards the ground electrode. A possible explanation is that an ionic wind and/or an induced jet leads to the movement of the hot plume. However, the plasma-induced flow (the ionic wind and the induced jet) is generated after the primary plasma discharges; namely, the hot plume does not move immediately after the first plasma discharge. At almost the same time as the movement of the hot plume, consecutive plasma discharges enhance the density of the hot plume; thereafter, the density reaches almost a steady state.

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Dielectric barrier discharge actuator for vehicle drag reduction at highway speeds

Cited by 34 publications

References 19 publications

Experimental Investigation and ANN Prediction on the Underbody Drag Minimization in Truck Model using DC Pulsed DBD Plasma Actuator as an Active Flow Control Device

Experimental Investigation and ANN Prediction on the Underbody Drag Minimization in Truck Model using DC Pulsed DBD Plasma Actuator as an Active Flow Control Device

A plasma‐fluid model for EHD flow in DBD actuators and experimental validation

Temporal variation of the spatial density distribution above a nanosecond pulsed dielectric barrier discharge plasma actuator in quiescent air

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