Effect of DBD plasma excitation characteristics on turbulent separation over a hump model

Ma, Lu; Wang, Xiaodong; Zhu, Jian

doi:10.1088/2058-6272/aacdf0

Cited by 3 publications

(7 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where E 0 = 1.2 × 10 4 kV/m is the maximum electric field strength, and the coefficients k 1 = 1.8 × 10 9 kV/m 2 and k 2 = 3.6 × 10 9 kV/m 2 are obtained from the electric field distribution [30]. The body force induced by the plasma actuator can be expressed as electric field force…”

Section: Plasma Actuator Modelmentioning

confidence: 99%

“…where e = 1.602 × 10 -19 C [24] is elementary charge, and ρ c = 1 × 10 17 m 3 [24]. The α = 0.3 is the correction factor [30]. The duty cycle is:…”

Section: Plasma Actuator Modelmentioning

confidence: 99%

“…It can be seen from Figure 5 that the corrected model has a good agreement with the experimental values. where E0 = 1.2 × 10 4 kV/m is the maximum electric field strength, and the coefficients k1 = 1.8 × 10 9 kV/m 2 and k2 = 3.6 × 10 9 kV/m 2 are obtained from the electric field distribution [30]. The body force induced by the plasma actuator can be expressed as electric field force c F E e ρ α =   (2) where e = 1.602 × 10 -19 C [24] is elementary charge, and ρc = 1 × 10 17 m 3 [24].…”

Section: Plasma Actuator Modelmentioning

confidence: 99%

“…The body force induced by the plasma actuator can be expressed as electric field force c F E e ρ α =   (2) where e = 1.602 × 10 -19 C [24] is elementary charge, and ρc = 1 × 10 17 m 3 [24]. The α = 0.3 is the correction factor [30].…”

Section: Plasma Actuator Modelmentioning

confidence: 99%

“…Therefore, the experimental correction of the Shyy's model must be performed before the numerical calculation. The following literature use the corrected Shyy's model for numerical simulation studies [30,31]. Considering the complex unsteadiness of the VAWT dynamic stall and the accuracy of the phenomenological model, in this paper, the modified Shyy's model is selected for numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Dynamic Stall of a Vertical-Axis Wind Turbine and Its Control Using Plasma Actuation

Wang

Zhu

et al. 2019

Energies

Self Cite

View full text Add to dashboard Cite

In this paper, a dynamic stall control scheme for vertical-axis wind turbine (VAWT) based on pulsed dielectric-barrier-discharge (DBD) plasma actuation is proposed using computational fluid dynamics (CFD). The trend of the wind turbine power coefficient with the tip speed ratio is verified, and the numerical simulation can describe the typical dynamic stall process of the H-type VAWT. The tangential force coefficient and vorticity contours of the blade are compared, and the regular pattern of the VAWT dynamic stall under different tip speed ratios is obtained. Based on the understanding the dynamic stall phenomenon in flow field, the effect of the azimuth of the plasma actuation on the VAWT power is studied. The results show that the azimuth interval of the dynamic stall is approximately 60° or 80° by the different tip speed ratio. The pulsed plasma actuation can suppress dynamic stall. The actuation is optimally applied for the azimuthal position of 60° to 120°.

show abstract

Section: Plasma Actuator Modelmentioning

confidence: 99%

“…where e = 1.602 × 10 -19 C [24] is elementary charge, and ρ c = 1 × 10 17 m 3 [24]. The α = 0.3 is the correction factor [30]. The duty cycle is:…”

Section: Plasma Actuator Modelmentioning

confidence: 99%

Section: Plasma Actuator Modelmentioning

confidence: 99%

Section: Plasma Actuator Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dynamic Stall of a Vertical-Axis Wind Turbine and Its Control Using Plasma Actuation

Wang

Zhu

et al. 2019

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

CFD Studies of Wake Characteristics and Power Capture of Wind Turbines With Trailing Edge Flaps

et al. 2020

View full text Add to dashboard Cite

Trailing edge flap (TEF) devices will change downstream wake development in wind farms comprising smart rotors, which in turn affect the performance of downstream wind turbines. To study the influence of TEFs on downstream wake development and power capture of wind turbines in wind farms, computational fluid dynamics (CFD) simulations using the three-dimensional rotor model are performed in this paper. The CFD software Fluent is adopted to simulate a wind farm with two tandem wind turbines with TEFs at rated and below rated turbulent wind conditions. Under the 11.4 m/s turbulent wind conditions, the results show that the deflection of the TEF increases the velocity deficit and reduces the wake width, making the wake more complicated. And the positive TEF angle has a greater influence on downstream wake than the negative TEF angle. Additionally, under the 9 m/s turbulent wind conditions, the total power of the two wind turbines increases by 6.5% when the TEF angles are 6 •. INDEX TERMS Computational fluid dynamics, horizontal axis wind turbine, power capture, smart rotor, trailing edge flap, wake development. YUE XU received the M.A.Eng. degree from North China Electric Power University, Beijing, China, in 2015. She was with the CSSC Systems Engineering Research Institute. She is currently an Engineer with China Shipbuilding IT Company Ltd. Her research interests include hydrodynamic analysis, ship electronic information systems, big data analysis, and artificial intelligence. XINYU ZHANG received the M.S.E. degree from the Dalian University of Technology, China, in 2016. She was with the CSSC Systems Engineering Research Institute. She is currently an Engineer with China Shipbuilding IT Company Ltd. Her research interests include hydrodynamic analysis and ship electronic information systems.

show abstract

Investigation of a Dielectric Barrier Discharge Plasma Actuator to Control Turbulent Boundary Layer Separation

Hasan

Atkinson

2020

Applied Sciences

View full text Add to dashboard Cite

A numerical investigation was carried out to explore the effects of a dielectric barrier discharge (DBD) plasma actuator on a three-dimensional incompressible, separated flow. The test article selected for the simulations was the National Aeronautical and Space Administration (NASA) wall-mounted hump model. The simulations were run at a Reynolds number of 936,000, based on hump chord length, and a freestream Mach number of 0.1. Hybrid partially averaged Navier–Stokes/large-eddy simulations (PANS/LES) were completed using CALC-LES, a well-validated computational fluid dynamics (CFD) code, developed by Chalmers University of Technology. The baseline code was modified to simulate the effects of the actuator, which were modeled as source terms in the momentum equation and were assumed to be steady and constant in the span-wise direction. The numerical simulations were carried out for a baseline (no control) case and five plasma control cases. To optimize the performance of the actuator, the variation of actuator location and voltage frequency was investigated. For the baseline case, a comparison of time-averaged skin friction, the coefficient of pressure, and velocity profiles was made of the available experimental results. The results of the baseline case showed good agreement for a hybrid turbulence model, thus strengthening the solver’s ability to predict a three-dimensional separated flow with reasonable accuracy. The results with the plasma actuator turned on showed improved flow characteristics compared to the baseline simulations by reducing the region of separated flow. The actuator placed just downstream of the separation point at an operational frequency of 5kHz completely eliminated the separated flow for our test conditions.

show abstract

Effect of DBD plasma excitation characteristics on turbulent separation over a hump model

Cited by 3 publications

References 19 publications

Dynamic Stall of a Vertical-Axis Wind Turbine and Its Control Using Plasma Actuation

Dynamic Stall of a Vertical-Axis Wind Turbine and Its Control Using Plasma Actuation

CFD Studies of Wake Characteristics and Power Capture of Wind Turbines With Trailing Edge Flaps

Investigation of a Dielectric Barrier Discharge Plasma Actuator to Control Turbulent Boundary Layer Separation

Contact Info

Product

Resources

About