S052023 Aerodynamic Characteristics Improvement of a Wind Turbine by Plasma Actuators

Koshi, Mitsuo; Watanabe, Shigeya; Atobe, Takashi; Ito, Takeshi; Shiohara, Tatsuro; Tanaka, Motofumi

doi:10.1299/jsmemecj.2013._s052023-1

Cited by 2 publications

(12 citation statements)

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“…Here, the ambient pressure p is assumed to be atmospheric pressure (=1.013 × 10 5 The computational schemes for the governing equations are summarized in Table 1. The drift terms of Eqs.…”

Section: Simulation Modelmentioning

confidence: 99%

“…The conventional DBDPA has thin and simple structure and lightweight so is an easy installable device. Because of these notable merits, many application studies have been conducted; the noise-reduction of vehicles 4 , the improvement of the stall characteristics of the airfoil 5,6 Aiming to enhance the flow of DBDPA, actuators with more than two electrodes are suggested. For example, Benard et al have suggested arrayed-type DBDPAs in which multiple DBDPAs are arranged in the mainstream direction and so on.…”

Section: Introductionmentioning

confidence: 99%

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Basic Study on the Voltage Characteristic of Dual-Grounded Tri-Electrode Plasma Actuator by Plasma Simulation

Nakano

Nishida

2016

47th AIAA Plasmadynamics and Lasers Conference

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Recently, dielectric barrier discharge plasma actuator (DBDPA) is actively researched as an active flow control devices. However, the induced flow is too slow to be installed on the aerodynamic bodies to control a high-speed flow. To this problem, DualGrounded Tri-Electrode plasma actuator (DGTEPA) was suggested as a solution which can make stronger flow with better efficiency. So in this research, we investigate the discharge structure and body force field of the conventional DBDPA and the DGTEPA by a plasma simulation to clarify the mechanism that the DGTEPA gains its performance. First, we evaluated the validity of the simulation results. Although there are some quantitative and qualitative discrepancies, we confirmed they are almost qualitatively in agreement with the experiments. Second, we discussed about the distribution of the plasma density and confirmed that there is another discharge occurs near the third electrode of the DGTEPA. In addition, when the third electrode is close enough to the AC electrode edge, the plasma near the third electrode is supplied to the near region of the AC electrode edge. Last of all, we examined the body force distribution and we found there are strong body force regions in where the high density plasma exists. Also when the third electrode is close enough to the AC electrode edge, the body force is drastically enhanced because of the expansion of a discharge region near the AC electrode edge. NomenclatureD e , D p , D n e = elementary charge = diffusion coefficient for electron, positive ion and negative ion E f = body force vector = electric field vector j e , j p , j n r = electron, positive ion and negative ion number density ep r = recombination coefficient between electron and positive ion pn t = time = recombination coefficient between positive ion and negative ion p = ambient pressure v e α = ionization coefficient = mean velocity of electron ε 0 , ε r γ = secondary electron emission coefficient = electric permittivity in the vacuum and relative electric permittivity of the dielectric μe, μp, μn = time index during navigation η = attachment coefficient σ = surface charge density 1 Student of Master Course, 2-24-16, Nakacho, Koganei, Tokyo, 184-8588, JAPAN, Mechanical System Engineering, Student Member AIAA.

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“…Here, the ambient pressure p is assumed to be atmospheric pressure (=1.013 × 10 5 The computational schemes for the governing equations are summarized in Table 1. The drift terms of Eqs.…”

Section: Simulation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Basic Study on the Voltage Characteristic of Dual-Grounded Tri-Electrode Plasma Actuator by Plasma Simulation

Nakano

Nishida

2016

47th AIAA Plasmadynamics and Lasers Conference

View full text Add to dashboard Cite

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“…Recently, Fujii [18] provided a comprehensive review based on previous efforts [13][14][15][16][17] and also presented a further possibility of airfoil-flow control using a DBD-PA-based flow control based on the results of LES and other related experiments. Recently, a DBD-PA-based flow control was applied to the blades of HAWTs [19][20][21][22][23][24][25][26][27]. Tables 1 and 2 show that each study evaluated the performance of the DBD-PA-based flow control technique while taking into consideration different configurations of HAWTs during different flow conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Tables 1 and 2 show that each study evaluated the performance of the DBD-PA-based flow control technique while taking into consideration different configurations of HAWTs during different flow conditions. In Tables 1 and 2 Recently, a DBD-PA-based flow control was applied to the blades of HAWTs [19][20][21][22][23][24][25][26][27]. Tables 1 and 2 show that each study evaluated the performance of the DBD-PA-based flow control technique while taking into consideration different configurations of HAWTs during different flow conditions.…”

Section: Introductionmentioning

confidence: 99%

“…where ρ ∞ , µ ∞ , U ∞ , U tip , a ∞ , c, b, r root , and f rot , represent the density of air, the viscosity of air, the velocity of air, the velocity of blade tip, speed of sound of air, the chord length of blade, the radial length at the root of blade from the center of rotation, and the rotational frequency of blade, respectively, and subscript ∞ indicates the quantities in the freestream condition. Moreover, certain improvements in torque generation due to the DBD-PA-based flow control technique have been reported [19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Separated Flow Control of Small Horizontal-Axis Wind Turbine Blades Using Dielectric Barrier Discharge Plasma Actuators

Aono

Fukumoto

et al. 2020

Energies

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The flow control over the blades of a small horizontal-axis wind turbine (HAWT) model using a dielectric barrier discharge plasma actuator (DBD-PA) was studied based on large-eddy simulations. The numerical simulations were performed with a high-resolution computational method, and the effects of the DBD-PA on the flow fields around the blades were modeled as a spatial body force distribution. The DBD-PA was installed at the leading edge of the blades, and its impacts on the flow fields and axial torque generation were discussed. The increase in the ratios of the computed, cycle-averaged axial torque reasonably agreed with that of the available experimental data. In addition, the computed results presented a maximum of 19% increase in the cycle-averaged axial torque generation by modulating the operating parameters of the DBD-PA because of the suppression of the leading edge separation when the blade’s effective angles of attack were relatively high. Thus, the suppression of the leading edge separation by flow control can lead to a delay in the breakdown of the tip vortex as a secondary effect.

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S052023 Aerodynamic Characteristics Improvement of a Wind Turbine by Plasma Actuators

Cited by 2 publications

References 0 publications

Basic Study on the Voltage Characteristic of Dual-Grounded Tri-Electrode Plasma Actuator by Plasma Simulation

Basic Study on the Voltage Characteristic of Dual-Grounded Tri-Electrode Plasma Actuator by Plasma Simulation

Separated Flow Control of Small Horizontal-Axis Wind Turbine Blades Using Dielectric Barrier Discharge Plasma Actuators

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