[Show abstract] [Hide abstract] ABSTRACT: A totally new wall motion actuator for the charge of boundary layer flow is presented. The actuator includes a magnetic fluid layer through getting an adaptable membrane surface and coil system. The vertical motion within the elastic membrane is generated once the magnetic fields they can fit round the magnetic fluid. You are able to control the wall motion using the adjustment inherited current for that coils. The dynamic and static characteristics within the new actuators are really experimentally investigated. The effectiveness of the actuator for laminar flow control remains proven via wind tunnel testing. Two-dimensional travelling waves, or Tollmien-Schlichting waves (T-S waves), are really effectively attenuated while using the new actuator.

Full-text · Article · February 1999

[Show abstract] [Hide abstract] ABSTRACT: Active flow control could be a subject entirely expansion because of connected industrial applying huge importance, produced for aeronautics. Of flow control methods, like the usage of mechanical flaps, wall synthetic jets or MEMS, plasma-based merchandise is very promising. The primary benefits of such systems are their sturdiness, simplicity, low power consumption and talent legitimate-time control at high frequency. This paper is overview around the world creates this subject, within the origin to the current. It’s separated into two primary parts. The foremost is devoted for that recent understanding concerning the electric wind introduced on by surface non-thermal plasma actuators, acting in air at atmospheric pressure. Typically, it could achieve 8 m s1 a lengthy way away of .5 mm inside the wall.

Within the second part, works concerning active ventilation control by these plasma actuators are presented. Extremely effective answers are really acquired for low-velocity subsonic airflows (typically U 30 m s1 and Reynolds amount number of 105), and promising results at greater velocities indicate that plasma actuators might be present in aeronautics.

Article · Jan 2007

Eric Moreau

[Show abstract] [Hide abstract] ABSTRACT: The current jobs are an effort to improve the portrayal and quantification within the performance of dielectric barrier discharge (DBD) plasma actuators for aerodynamic flow-control applications. Existing measurement and evaluation strategies, along with additional new approaches are really applied and they are discussed extensively. Novel scaling figures are introduced that yield universal and partially non-dimensional key quantities by having an improved think about the electrical discharge characteristics combined with the ecological influences regarding the behavior of plasma actuators. The present means of measure the momentum transfer inside the plasma for that surrounding air are reviewed and have been put on obtain a comprehensive and comparative research to the particular variations according to experimentally acquired data. Direct and implicit furthermore to differential and integral pressure estimation approaches are discussed. To combat influences within the atmosphere across the discharge and so assuring constant plasma-actuator performance, a closed-loop control circuit within the electrical setup is introduced and effectively proven within the proof-of-concept experiment.

Thesis · 12 , 2011 · Journal of Physics D Applied Physics

Jochen Kriegseis