Optimisation of multiple encapsulated electrode plasma actuator

Erfani, Rasool; Erfani, Tohid; Utyuzhnikov, Sergei; Kontis, Konstantinos

doi:10.1016/j.ast.2012.02.020

Cited by 53 publications

(16 citation statements)

References 32 publications

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“…One electrode is exposed to the air, while the other is encapsulated in the dielectric. 21,22 The electrodes are long and thin and are arranged spanwise on an aerodynamic surface. A high voltage alternating current (AC) input, with typical voltages of 2 kV to 40 kV p−p (peak to peak) and frequencies of 300 Hz to 1 MHz are supplied to the exposed electrode while the encapsulated electrode is grounded.…”

Section: Introductionmentioning

confidence: 99%

Plasma actuator: Influence of dielectric surface temperature

Erfani

Zare‐Behtash

Kontis

2012

Experimental Thermal and Fluid Science

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Plasma actuators have become the topic of interest of many researchers for the purpose of flow control. They have the advantage of manipulating the flow without the need for any moving parts, a small surface profile which does not disturb the free stream flow, and the ability to switch them on or off depending on the particular situation (active flow control). Due to these characteristics they are becoming very popular for flow control over aircraft wings. The objective of the current study is to examine the effect of the actuator surface temperature on its performance. This is an important topic to understand when dealing with real life aircraft equipped with plasma actuators. The temperature variations encountered during a flight envelope may have adverse effects in actuator performance. A peltier heater along with dry ice are used to alter the actuator temperature, while particle image velocimetry (PIV) is utilised to analyse the flow field. The results show a significant change in the induced flow field by the actuator as the surface temperature is varied. It is found that for a constant peak-to-peak voltage the maximum velocity produced by the actuator depends directly on the dielectric surface temperature. The findings suggest that by changing the actuator temperature the performance can be maintained or even altered at different environmental conditions.

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Section: Introductionmentioning

confidence: 99%

Plasma actuator: Influence of dielectric surface temperature

Erfani

Zare‐Behtash

Kontis

2012

Experimental Thermal and Fluid Science

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“…In terms of flow control efficiency, parameters such as thickness of the dielectric material, dielectric constant of the dielectric material, the distance between electrodes, the electrode lengths, applied voltage level, applied voltage signal properties, electrode geometry and the number of electrodes appear to play an important role in the prosess. Erfani et al (2013) conducted a study in which the plasma structures formed by placing a plasma actuator having a multiple encapsulate electrode structure with an electrode in contact with air on a flat plate. The induced flow velocity is increased and more momentum is provided by using multiple-encapsulate electrodes.…”

Section: Resultsmentioning

confidence: 99%

Optimisation of Wire Electro Discharge Machining Parameter Using Desirability Based Multi Objective RSM While Machining of Al6061–Cenosphere AMCs

Dey¹,

Pandey²,

Das³

2017

Mechanical Engineering

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The aim of SEEP2017 is to bring together the researches within the field of sustainable energy and environmental protection from all over the world.The contributed papers are grouped in 18 sessions in order to provide access to readers out of 300 contributions prepared by authors from 52 countries.We thank the distinguished plenary and keynote speakers and chairs who have kindly consented to participate at this conference. We are also grateful to all the authors for their papers and to all committee members.We believe that scientific results and professional debates shall not only be an incentive for development, but also for making new friendships and possible future scientific development projects. The footprint assessment techniques has provided a set of tools enabling the evaluation of Greenhouse Gas (GHG) -including CO2, emissions and the corresponding effective flows on the world scale. From all such indicators, the energy footprint represents the area of forest that would be required to absorb the GHG emissions resulting from the energy consumption required for a certain activity, excluding the proportion absorbed by the oceans, and the area occupied by hydroelectric dams and reservoirs for hydropower.An overview of the virtual GHG flow trends in the international trade, associating the GHG and water footprints with the consumption of goods and services is performed. Several important indications have been obtained: (a) There are significant GHG gaps between producer's and consumer's emissions -US and EU have high absolute net imports GHG budget. (b) China is an exporting country and increasingly carries a load of GHG emission and virtual water export associated with consumption in the relevant importing countries. (c) International trade can reduce global environmental pressure by redirecting import to products produced with lower intensity of GHG emissions and lower water footprints, or producing them domestically.To develop self-sufficient regions based on more efficient processes by combining neighbouring countries can be a promising development. A future direction should be focused on two main areas: (1) To provide the self-sufficient regions based on more efficient processes by combining production of surrounding countries. (2) To develop the shared mechanism and market share of virtual carbon between trading partners regionally and internationally. HAKAN SERHAD SOYHAN 4 Development in energy sector, technological advancements, production and consumption amounts in the countries and environmental awareness give shape to industry of energy. When the dependency is taken into account in terms of natural resources and energy, there are many risks for countries having no fossil energy sources. Renewable and clean sources of energy and optimal use of these resources minimize environmental impacts, produce minimum secondary wastes and are sustainable based on current and future economic and social societal needs. Sun is one of the main energy sources in recent years. Light and heat of sun are used in...

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“…Erfani et al [1] conducted a study in which the plasma structures formed by placing a plasma actuator having a multiple encapsulated electrode structure with an electrode in contact with air on a flat plate. The induced flow velocity is increased and more momentum is provided by using multipleencapsulated electrodes.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Plasma Actuator Electrode Geometry Configurations for Improvement of the Aerodynamic Performance of an Airfoil

Akbıyık¹,

Yavuz²,

Akansu³

2018

SV-JME

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In this study, the induced flow effects of plasma generated by various types of electrode geometry configurations are presented. The model chosen for the study is a NACA0015 airfoil. The experiments are conducted in a wind tunnel at Reynolds number of 4.8×10 4. The plasma actuators mounted on the leading edge of the airfoil at chord position of 0.1 (x/C). The plasma actuators consist of an embedded and exposed electrode between which a dielectric material is placed. The applied voltage is set to 7 kV pp. The excitation frequency is also set to 3.5 kHz. Three different electrode geometry configurations, namely as linear, saw-tooth and square, are considered for the study. As a part of the experimental study, the two dimensional and three dimensional flow structures generated by the plasma actuators and related analysis results are presented. In addition, necessary measurements are also made to determine the drag and lift forces. Keywords: NACA0015 airfoil, lift and drag coefficients, square plasma actuator, sawtooth plasma actuator, linear plasma actuator Highlights • The 2D and 3D flow structure generated by the plasma actuators. • The plasma actuator geometry is determined according to the necessary conditions of the aircraft. • The stall angle is shifted by 2 degrees.

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Optimisation of multiple encapsulated electrode plasma actuator

Cited by 53 publications

References 32 publications

Plasma actuator: Influence of dielectric surface temperature

Plasma actuator: Influence of dielectric surface temperature

Optimisation of Wire Electro Discharge Machining Parameter Using Desirability Based Multi Objective RSM While Machining of Al6061–Cenosphere AMCs

A Study on the Plasma Actuator Electrode Geometry Configurations for Improvement of the Aerodynamic Performance of an Airfoil

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