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.

scholarly journals Flow control of leading edge separation using DBD plasma actuator

2014 ◽  
Vol 80 (813) ◽  
pp. FE0118-FE0118 ◽  
Author(s):  
Yasuaki KOZATO ◽  
Yuta HIROSE ◽  
Satoshi KIKUCHI ◽  
Shigeki IMAO
Keyword(s):  
Flow Control ◽  
Leading Edge ◽  
Plasma Actuator ◽  
Dbd Plasma ◽  
Edge Separation

scholarly journals Control of leading edge separation on airfoil using DBD plasma actuator

2014 ◽  
Vol 9 (3) ◽  
pp. JFST0049-JFST0049 ◽  
Author(s):  
Nazri MD DAUD ◽  
Yasuaki KOZATO ◽  
Satoshi KIKUCHI ◽  
Shigeki IMAO
Keyword(s):  
Leading Edge ◽  
Plasma Actuator ◽  
Dbd Plasma ◽  
Edge Separation

Optimization and Evaluation of Multiple DBD Plasma Actuators Applied in the Tip Leakage Control for Turbine Cascade

2019 ◽  
Author(s):  
Jianyang Yu ◽  
Wenchun Bao ◽  
Fu Chen ◽  
Yanping Song ◽  
Cong Wang
Keyword(s):  
Flow Control ◽  
Mass Flow ◽  
Suction Side ◽  
Plasma Actuator ◽  
Plasma Actuators ◽  
Leakage Flow ◽  
Tip Leakage Flow ◽  
Dbd Plasma ◽  
Tip Leakage ◽  
Leakage Control

Abstract The dielectric barrier discharge (DBD) plasma actuator, in which electrodes are asymmetric arranged, has already demonstrated its ability in flow control. In the present work, the configuration of multiple plasma actuators is placed at the suction side of the cascade top to realize the tip leakage control. However, massive configurations appear when the number of plasma actuators increases, resulting in the investigation of actuator configuration for tip leakage flow control becomes a challenge. The surrogate modelling approach provides a cheap and efficient method to investigate the effect of multiple plasma actuators on the tip leakage flow control. By constructing an approximation model, tip leakage mass flow rates of all configuration are obtained in the present work. What’s more, the flow structures in the tip clearance controlled by the plasma actuators are explained in the process of topological analysis. The results show that the tip leakage mass flow rate is decreasing with the number of active plasma actuators increasing. However, the decreasing would reach its limits in the process of adding plasma actuators. In the analysis of flow topology, single actuator would generate a small vortex at the suction side to cause an obstacle in the tip leakage flow. While the continuous arrangements of plasma actuator is beneficial to generate an induced vortex to diminish the tip leakage flow.

Control of leading edge separation on airfoil using DBD plasma actuator with signal amplitude modulation

2015 ◽  
Vol 19 (1) ◽  
pp. 37-47 ◽  
Author(s):  
Nazri Md Daud ◽  
Yasuaki Kozato ◽  
Satoshi Kikuchi ◽  
Shigeki Imao
Keyword(s):  
Amplitude Modulation ◽  
Leading Edge ◽  
Signal Amplitude ◽  
Plasma Actuator ◽  
Dbd Plasma ◽  
Edge Separation

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.

scholarly journals Dynamic Burst Actuation to Enhance the Flow Control Authority of Plasma Actuators

Aerospace ◽  
2021 ◽  
Vol 8 (12) ◽  
pp. 396
Author(s):  
Takuto Ogawa ◽  
Kengo Asada ◽  
Satoshi Sekimoto ◽  
Tomoaki Tatsukawa ◽  
Kozo Fujii
Keyword(s):  
Flow Control ◽  
Stokes Equations ◽  
Computational Study ◽  
Single Point ◽  
Leading Edge ◽  
Plasma Actuator ◽  
Control Cost ◽  
Dbd Plasma ◽  
Burst Frequency ◽  
Airfoil Surface

A computational study was conducted on flows over an NACA0015 airfoil with dielectric barrier discharge (DBD) plasma. The separated flows were controlled by a DBD plasma actuator installed at the 5% chord position from the leading edge, where operated AC voltage was modulated with the duty cycle not given a priori but dynamically changed based on the flow fluctuations over the airfoil surface. A single-point pressure sensor was installed at the 40% chord position of the airfoil surface and the DBD plasma actuator was activated and deactivated based on the strength of the measured pressure fluctuations. The Reynolds number was set to 63,000 and flows at angles of attack of 12 and 16 degrees were considered. The three-dimensional compressible Navier–Stokes equations including the DBD plasma actuator body force were solved using an implicit large-eddy simulation. Good flow control was observed, and the burst frequency proven to be effective in previous fixed burst frequency studies is automatically realized by this approach. The burst frequency is related to the characteristic pressure fluctuation; our approach was improved based on the findings. This improved approach realizes the effective burst frequency with a lower control cost and is robust to changing the angle of attack.

Influence of Exposed Electrode Thickness on Plasma Actuators Performance for Coupled Deicing and Flow Control Applications

2021 ◽  
Author(s):  
F. F. Rodrigues ◽  
M. Abdollahzadeh ◽  
J. Pascoa ◽  
L. Pires
Keyword(s):  
Temperature Field ◽  
Surface Temperature ◽  
Flow Control ◽  
Active Flow Control ◽  
Plasma Actuator ◽  
Plasma Actuators ◽  
Dbd Plasma ◽  
Electrode Thickness ◽  
Dielectric Thickness ◽  
Surface Temperature Field

Abstract Dielectric Barrier Discharge (DBD) plasma actuators are a popular topic of research within the active flow control field. Recently, these devices have gained interest for deicing and ice prevention applications and it has been proved they allow to perform simultaneously deicing and flow control. Studies have shown that the exposed electrode plays an important role on the surface temperature field of the plasma actuator. Thus, in the current study, by the first time, we investigate the influence of the exposed electrode thickness on the induced velocity flow field and surface temperature field. Three plasma actuators with different dielectric thicknesses (0.3 mm, 0.6 mm and 1.02 mm) were mounted with a thick exposed electrode (thickness of 0.8 mm). These three actuators with thick exposed electrode were experimentally studied and compared against other three plasma actuators with same dielectric thickness but with a thin exposed electrode (thickness of 80 μm). The DBD actuators were experimentally studied considering their electrical, mechanical and thermal behavior. The results are presented and discussed in order to understand the influence of the exposed electrode thickness on the mechanical and thermal plasma actuator performances.

scholarly journals Preliminary Investigation of Using DBD Plasma for Application in Micro Combustors

2021 ◽  
Vol 82 (1) ◽  
pp. 105-112
Author(s):  
Nurfarah Diana Mohd Ridzuan Tan ◽  
Fudhail Abdul Munir ◽  
Musthafah Mohd Tahir ◽  
Herman Saputro ◽  
Masato Mikami
Keyword(s):  
Flow Control ◽  
Air Flow ◽  
Preliminary Investigation ◽  
Flow Characteristics ◽  
Infrared Camera ◽  
Plasma Actuator ◽  
Plasma Actuators ◽  
Dbd Plasma ◽  
Air Flow Control ◽  
Wide Usage

Dielectric-Barrier-Discharge (DBD) plasma actuators are one of the recent research topics that has caught worldwide attention. Plasma actuators are typically used in the aerospace field of study for their flow control and wide usage of different types of plasma actuators. DBD plasma actuator is an immobile actuator that able to be utilized for its flexibility and light weight parts. Due to the wide usage of DBD plasma, it is also able to be useful in the field of combustion in terms of air flow control. In this research, the DBD plasma actuator is tested on its ability to be applied in micro combustors based on the air flow controlling aspect, the temperature of plasma and effects of vibration of plasma. Experiments were performed in the wind tunnel with smoke generator to show the flow separation by DBD plasma actuator while infrared camera and accelerometer were used to sense the temperature and vibration respectively to investigate the effects of DBD plasma actuator on these aspects. Results shows that the plasma generated has minimal effects of the flow characteristics whereas the temperature of plasma has a maximum of 90?celcius when it is generated continuously. The vibration results indicate that generating plasma produces a small amount of vibration.

High Lift Airfoil Leading Edge Separation Control with Nanosecond Pulse DBD Plasma Actuators

2010 ◽  
Author(s):  
Jesse Little ◽  
Keisuke Takashima ◽  
Munetake Nishihara ◽  
Igor Adamovich ◽  
Mo Samimy
Keyword(s):  
Leading Edge ◽  
Nanosecond Pulse ◽  
Plasma Actuators ◽  
Separation Control ◽  
Dbd Plasma ◽  
High Lift ◽  
Edge Separation

Experimental Analysis of Closed-Loop Flow Control Around Airfoil Using DBD Plasma Actuator

2017 ◽  
Author(s):  
Satoshi Shimomura ◽  
Takuto Ogawa ◽  
Satoshi Sekimoto ◽  
Taku Nonomura ◽  
Akira Oyama ◽  
...  
Keyword(s):  
Flow Control ◽  
Pressure Fluctuation ◽  
Closed Loop ◽  
Control Method ◽  
Angle Of Attack ◽  
Leading Edge ◽  
Plasma Actuator ◽  
Chord Length ◽  
Dbd Plasma ◽  
Attached Flow

This paper experimentally investigates the effectiveness of a closed-loop flow control method using a DBD plasma actuator for a NACA0015 airfoil, in which the surface pressure fluctuation is fed back to the system; the actuator was driven when the pressure fluctuation exceeds the setup threshold. The Reynolds number based on the chord length is set to 63,000 and the angle of attack is in the range from 12 to 15 degrees. The actuator was installed on the surface at 5% of the chord length from the leading edge. The results show that the closed-loop control worked better than the continuous operation. In the angle of attack of 12 and 14 degrees, the complete attached flow was attained by setting the appropriate threshold value of the pressure fluctuation. On the other hand, in 15 degrees, although the complete attached flow was not attained, the flow separation was partially suppressed.

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