Frequency-Dependent Capacitance-Based Plasma Model for Direct Simulation of Navier–Stokes Equation

Bagade, P. M.; Sengupta, Soumyo; Sengupta, Tapan K.

doi:10.2514/1.j055270

Cited by 2 publications

(1 citation statement)

References 55 publications

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“…Also, burst and amplitude modulated excitation for plasma actuators is recently recognized as an approach for achieving a multi-objective optimization [46,47]. The effects of the plasma excitation frequency, duty cycle, and voltage waveform to delay flow separation have been studied [48]. The literature review shows that the amplitude and the burst modulated excitation had a marked effect on the aerodynamic characteristics compared to the sinusoidal signal [40,49].…”

Section: Burst Modulationmentioning

confidence: 99%

Parametric study of a frequency-modulated pulse jet by measurements of flow characteristics

2021

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Recently, pulsed jet actuators have been discovered as an efficient and promising technique for flow separation control. In this paper, a systematic experimental investigation is carried out using a flow control approach, in order to study the flow field characteristics of a baseline single pulsed jet actuator, under different excitation conditions. The findings are used to provide a better understanding of pulsed blowing actuator operation and the associated flow physics. In these experiments, two types of signal waveforms have been implemented to produce the pulsed excitation of jet; a simple squarewave excitation signal for the first case and a burst modulated excitation signal for the second case. All measurements were conducted using a single hot-wire system to an axial distance x/D30 along the centerline. The effects of electrical parameters on properties of a single pulsed jet, including the excitation frequency from 10 up to 220 Hz and the duty cycle from 15% up to 80% for the first case, and different combinations of the carrier frequency and the modulating frequency for the second case have been studied. These measurements revealed a significant dependence of mean centerline velocity and turbulence intensity to excitation signal, frequency, and duty cycle. The statistical flow properties, such as mean centerline velocity decay and turbulence intensity distribution of pulsed jets are quantified and compared together over a wide range of pulsing parameters. This investigation aids in designing and optimizing flow control actuators in aerodynamics and combustion chambers. NomenclatureRECEIVED

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Section: Burst Modulationmentioning

confidence: 99%

Parametric study of a frequency-modulated pulse jet by measurements of flow characteristics

2021

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Flow control using single dielectric barrier discharge plasma actuator for flow over airfoil

et al. 2022

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The single dielectric barrier discharge (SDBD) plasma actuator has been developed in the present work for high accuracy, high-performance computing of flow control applications. The present physics-based SDBD model is a significant improvement over the one developed by Bagade {\it et al.}, "Frequency{\textendash}dependent capacitance{\textendash}based plasma model for direct simulation of {N}avier{\textendash}{S}tokes equation", AIAA J. {\bf 55}, 180--194, (2017) which was used for planar geometry using sequential computation. Based on the physics of SDBD operation, phase-averaged fully-developed body force over an ac cycle is computed and stored, which is reused. Thus, the intensive body force computations are bypassed in the new model, and the body force due to the SDBD plasma actuator is incorporated in the compressible Navier-Stokes equation that is solved in a body-fitted curvilinear coordinates. Here, the modified SDBD model enables performing large-scale simulations for the aerodynamic flow control at low speed and transonic flow past airfoils used in unmanned aerial vehicles (UAV) and executive jets. The flow control by SDBD plasma actuation is finally compared with other forms of flow control strategies.

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Frequency-Dependent Capacitance-Based Plasma Model for Direct Simulation of Navier–Stokes Equation

Cited by 2 publications

References 55 publications

Parametric study of a frequency-modulated pulse jet by measurements of flow characteristics

Parametric study of a frequency-modulated pulse jet by measurements of flow characteristics

Flow control using single dielectric barrier discharge plasma actuator for flow over airfoil

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