0104 Jet Flow Control by DBD Plasma Actuator : A change of the Jet Diffusion by the Electrode Dimensions

2010 ◽  
Vol 2010 (0) ◽  
pp. 13-14
Author(s):  
Hongyu JIN ◽  
Takashi ONO ◽  
Tomokazu TAKANO ◽  
Motoaki KIMURA
Keyword(s):  
Flow Control ◽  
Jet Flow ◽  
Plasma Actuator ◽  
Dbd Plasma

Jet Flow Control by DBD Plasma Actuator: Effect of Electrode Dimensions on Jet Diffusion

2011 ◽  
Author(s):  
Hongyu Jin ◽  
Takashi Ono ◽  
Motoaki Kimura
Keyword(s):  
Flow Control ◽  
Barrier Discharge ◽  
Jet Flow ◽  
Plasma Actuator ◽  
Plasma Actuators ◽  
Dbd Plasma ◽  
Flow Control Devices ◽  
Induced Flow ◽  
Control Devices ◽  
Effective Conditions

Dielectric barrier discharge (DBD) plasma actuators have been investigated by many researchers as flow-control devices. In the present study, we attempt to apply such actuators to a jet flow. In order to achieve enhanced mixing in a jet flow, we focused on the voltage and the frequency of the plasma actuator to examine their effect on the velocity and turbulence of the jet flow. This time, we examined how the induced flow by the plasma actuator electrode dimensions occurred. It was expected that higher velocity would have a larger effect on the jet flow in last year. In this study, we measured the flow velocity for different voltages and frequencies, and determined the most effective conditions for generating the induced flow. We apply that DBD plasma actuators to enhance turbulent intensity and jet flow’s diffusion.

0142 Jet Flow Control by a Coaxial DBD Plasma Actuator : Influence of Diffusion with an Electrode Size

2012 ◽  
Vol 2012 (0) ◽  
pp. 87-90
Author(s):  
Kentaro Sayo ◽  
Masazumi Onishi ◽  
Jun Asakura ◽  
Hongyu Jin ◽  
Motoaki Kimura
Keyword(s):  
Flow Control ◽  
Jet Flow ◽  
Plasma Actuator ◽  
Dbd Plasma ◽  
Electrode Size

scholarly journals Coherent structures induced by dielectric barrier discharge plasma actuator

2017 ◽  
Vol 31 (32) ◽  
pp. 1850038 ◽  
Author(s):  
Xin Zhang ◽  
Huaxing Li ◽  
Kwing So Choi ◽  
Longfei Song
Keyword(s):  
Flow Control ◽  
Dielectric Barrier Discharge ◽  
Coherent Structures ◽  
High Speed ◽  
Barrier Discharge ◽  
Plasma Actuator ◽  
Dbd Plasma ◽  
Peak Voltage ◽  
Dielectric Barrier ◽  
Piv Measurement

The structures of a flow field induced by a plasma actuator were investigated experimentally in quiescent air using high-speed Particle Image Velocimetry (PIV) technology. The motivation behind was to figure out the flow control mechanism of the plasma technique. A symmetrical Dielectric Barrier Discharge (DBD) plasma actuator was mounted on the suction side of the SC (2)-0714 supercritical airfoil. The results demonstrated that the plasma jet had some coherent structures in the separated shear layer and these structures were linked to a dominant frequency of [Formula: see text] = 39 Hz when the peak-to-peak voltage of plasma actuator was 9.8 kV. The high speed PIV measurement of the induced airflow suggested that the plasma actuator could excite the flow instabilities which lead to production of the roll-up vortex. Analysis of transient results indicated that the roll-up vortices had the process of formation, movement, merging and breakdown. This could promote the entrainment effect of plasma actuator between the outside airflow and boundary layer flow, which is very important for flow control applications.

S054051 Jet Flow Diffusion Control by DBD Plasma Actuator

2011 ◽  
Vol 2011 (0) ◽  
pp. _S054051-1-_S054051-4
Author(s):  
Masazumi ONISHI ◽  
Takashi ONO ◽  
Kouu KIN ◽  
Motoaki KIMURA
Keyword(s):  
Jet Flow ◽  
Plasma Actuator ◽  
Diffusion Control ◽  
Dbd Plasma

Effects of magnetic field on the jet flow induced by a DBD plasma actuator

2017 ◽  
Vol 2017.52 (0) ◽  
pp. 113
Author(s):  
Kazuki HAYA ◽  
Ryoto TANAKA ◽  
Shota Izumi ◽  
Kazumi TSUNODA
Keyword(s):  
Magnetic Field ◽  
Jet Flow ◽  
Plasma Actuator ◽  
Dbd Plasma

Flow Control on a Transport Truck Side Mirror Using Plasma Actuators

2015 ◽  
Vol 137 (11) ◽  
Author(s):  
Theodoros Michelis ◽  
Marios Kotsonis
Keyword(s):  
Flow Control ◽  
Guide Vane ◽  
Leading Edge ◽  
Plasma Actuator ◽  
Plasma Actuators ◽  
Dbd Plasma ◽  
Reference Case ◽  
Image Velocimetry ◽  
Wind Tunnel Study ◽  
Edge Separation

A wind tunnel study is conducted toward hybrid flow control of a full scale transport truck side mirror at ReD=3.2×105. A slim guide vane is employed for redirecting high-momentum flow toward the mirror wake region. Leading edge separation from the guide vane is reduced or eliminated by means of an alternating current -dielectric barrier discharge (AC-DBD) plasma actuator. Particle image velocimetry (PIV) measurements are performed at a range of velocities from 15 to 25 m/s and from windward to leeward angles from -5deg to 5deg. Time-averaged velocity fields are obtained at the center of the mirror for three scenarios: (a) reference case lacking any control elements, (b) guide vane only, and (c) combination of the guide vane and the AC-DBD plasma actuator. The comparison of cases demonstrates that at 25 m/s windward conditions (-5deg) the guide vane is capable of recovering 17% momentum with respect to the reference case. No significant change is observed by activating the AC-DBD plasma actuator. In contrast, at leeward conditions (5deg), the guide vane results in a −20% momentum loss that is rectified to a 6% recovery with actuation. The above implies that for a truck with two mirrors, 23% of momentum may be recovered.

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