Numerical Analysis of Active Control of Flow on a DBD Plasma Actuator Integrated Airfoil

İbrahimoğlu, Beycan; Yılmazoğlu, M. Zeki; Cucen, Ahmet

doi:10.1007/978-3-319-34181-1_30

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…There are several fundamental aspects of DBD that are not well-understood such as the kinetics of ion recombination, ionization of different species, and coupling between discharge and fluid flow. Thus, many studies have explored these multiphysics phenomena to optimize the electrical and mechanical effects of the DBD via analytical and numerical modeling [20][21][22][23]. The previous work in modeling corona EHD can be relevant [24,25].…”

Section: Introductionmentioning

confidence: 99%

Empirical relations for discharge current and momentum injection in dielectric barrier discharge plasma actuators

Tang¹,

Vaddi²,

Mamishev³

et al. 2021

J. Phys. D: Appl. Phys.

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Dielectric barrier discharge (DBD) plasma actuators with an asymmetric, straight edge electrode configuration generate a wall-bounded jet without moving parts. Mechanistic description of the interaction between the Coulombic forces and fluid motion as a function of DBD parameters remains unclear. This paper presents an experimental investigation of DBD actuators, including electrical current associated with microdischarges, plasma volume and the wall jet momentum over a range of alternating current (AC) frequencies (0.5–2 kHz) and peak-to-peak voltages up to 19.5 kV. Discharge current is measured with a high temporal resolution, plasma volume is characterized optically and the momentum induced by the DBD wall jet is computed based on the axial velocities measured downstream of the actuator using a custom-built pitot tube. Discharge current analysis demonstrated asymmetry between the positive and negative semi-cycle; both currents yielded a power–law relationship with empirical fitting coefficients. Plasma length varies linearly and volume quadratically with voltage. Although plasma length reached an asymptotic value at a higher frequency, the plasma volume grows due to the increasing height of the ionization region. In a simple two-dimensional configuration, the DBD wall jet momentum shows near-linear dependency with discharge current in the range of voltages and frequencies considered in this work. The presented empirical model characterizes the DBD wall jet momentum and the discharge current based only on the AC inputs. With the estimation of plasma volume, the model can be applied for determining more realistic boundary conditions in numerical simulations.

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Section: Introductionmentioning

confidence: 99%

Empirical relations for discharge current and momentum injection in dielectric barrier discharge plasma actuators

Tang¹,

Vaddi²,

Mamishev³

et al. 2021

J. Phys. D: Appl. Phys.

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show abstract

“…Notice that this approach is consistent with that of Refs. [35][36][37]. The plasma is here meant to act on a completely attached flow at Re ∼10 5 , with x component opposite to the main freestream direction-the y component is set in order to keep the plasma always tangent to the airfoil.…”

Section: Plasma Modelingmentioning

confidence: 99%

“…Notice that this approach is employed also in Refs. [35][36][37]39]. According to [38], this body force is achieved with input voltages between 10 and 20 kV.…”

Section: Plasma Modelingmentioning

confidence: 99%

Numerical Assessment of Virtual Control Surfaces for Load Alleviation on Compressor Blades

2018

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Virtual control surfaces for the optimization of steady and unsteady airloads on a compressor cascade are assessed numerically. The effects of mechanical surfaces are realized with plasma actuators, located both on the pressure and on the suction side of the blade trailing edge. Suction side plasma actuation is thought to reproduce the effects of mechanical wing spoilers, whereas pressure side plasma actuation is meant to act as a mechanical Gurney flap. Indeed, actuators are operated to generate an induced velocity field that is opposite relative to the direction of the freestream velocity. As a consequence, controlled recirculating flow areas are generated, which modify the effective mean line shape, as well as the position of the Kutta condition application point-and in turn the developed airloads. Proper triggering of pressure/suction side actuation is found to be effective in altering the blade loading, with effects comparable to those of mechanical control surfaces. Traveling wave mode simulations show that significant reductions in the peaks of the blade pitching moment can be achieved on the whole spectrum of interblade phase angles. It is proved that virtual control surfaces can provide effective load alleviation on the cascade, with potential remarkable reduction of fatigue phenomena.

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Position of Plasma at Phase Diagrams

İbrahimoğlu

2022

Critical States at Phase Transitions of Pure Substances

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Numerical Analysis of Active Control of Flow on a DBD Plasma Actuator Integrated Airfoil

Cited by 7 publications

References 6 publications

Empirical relations for discharge current and momentum injection in dielectric barrier discharge plasma actuators

Empirical relations for discharge current and momentum injection in dielectric barrier discharge plasma actuators

Numerical Assessment of Virtual Control Surfaces for Load Alleviation on Compressor Blades

Position of Plasma at Phase Diagrams

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