Unmanned air vehicle flow separation control using dielectric barrier discharge plasma at high wind

May 12, 2014

Plasma technology based on Dielectric Barrier Discharge (DBD) has been widely demonstrated to be a novel active flow control method. In order to make the plasma flow control technology more practical, the plasma authority must be improved at high wind speed. Dr. ZHANG Xin and his group from School of Aeronautic, Northwestern Polytechnical University set out to tackle this problem. After 2-years of innovative research, they have developed a novel plasma actuator to improve the plasma authority at high wind speed. They found that the novel plasma actuator acting on the surface of UAV could obviously suppress the boundary layer separation and reduce the model vibration at the wind speed of 100 m/s. Their study expanded the plasma actuator authority and demonstrated an important role of plasma actuator in the real application. Their work, entitled "Unmanned air vehicle flow separation control using dielectric barrier discharge plasma at high wind speed", was published in SCIENCE CHINA Physics, Mechanics & Astronomy. 2014, Vol 57(6).

Plasma flow control technology based on DBD has been widely demonstrated to be a novel active flow control method for boundary layer control, lift augmentation and separation control. Compared with the traditional active flow control, the plasma flow control has simple structure without moving parts and is convenient for real time control due to its fast response. Many researchers have engaged in the study of plasma flow control. However, in the existing literature, the wind speeds of stall separation control on three-dimensional aerial vehicle using DBD plasma actuator so far were no more than 50 m/s, but the flow speed of real flight is generally above 100 m/s. Therefore, in order to make the plasma flow control technology more practical, the plasma authority must be improved at higher wind speeds.

This work explored the aerodynamic control using novel plasma on a UAV at high wind speeds. The results indicated that the novel plasma actuator was not only jet actuator but also vortex generator, as shown in Figure 1. It can create relatively large-scale disturbances in the separated wake shear layer and promote momentum exchange between low speed and high speed regions which lead to shear layer separation delay. It was found that the maximum lift coefficient of the UAV was increased by 2.5% and the lift/drag ratio was increased by about 80% at the wind speed of 100 m/s. This study demonstrated an important role of plasma actuator in the real application.
-end-
This research project was partially supported by the Exploration Foundation of Weapon Systems. It is an important breakthrough in the recent history of the study of plasma flow control. Future research will focus on flight verification testing for the UAV and on the effects of atmospheric parameters, including atmospheric pressure, temperature, and particularly air humidity.

See the article:

Zhang X, Huang Y, Wang W B, et al. Unmanned air vehicle flow separation control using dielectric barrier discharge plasma at high wind speed. SCI CHINA Phys Mech Astron, 2014 Vol. 57 (6): 1160-1168

http://phys.scichina.com:8083/sciGe/EN/abstract/abstract508799.shtml

Science China Press Co., Ltd. (SCP) is a scientific journal publishing company of the Chinese Academy of Sciences (CAS). For 60 years, SCP takes its mission to present to the world the best achievements by Chinese scientists on various fields of natural sciences researches.

http://www.scichina.com/

Science China Press

Related Plasma Articles from Brightsurf:

Plasma treatments quickly kill coronavirus on surfaces
Researchers from UCLA believe using plasma could promise a significant breakthrough in the fight against the spread of COVID-19.

Fighting pandemics with plasma
Scientists have long known that ionized gases can kill pathogenic bacteria, viruses, and some fungi.

Topological waves may help in understanding plasma systems
A research team has predicted the presence of 'topologically protected' electromagnetic waves that propagate on the surface of plasmas, which may help in designing new plasma systems like fusion reactors.

Plasma electrons can be used to produce metallic films
Computers, mobile phones and all other electronic devices contain thousands of transistors, linked together by thin films of metal.

Plasma-driven biocatalysis
Compared with traditional chemical methods, enzyme catalysis has numerous advantages.

How bacteria protect themselves from plasma treatment
Considering the ever-growing percentage of bacteria that are resistant to antibiotics, interest in medical use of plasma is increasing.

A breakthrough in the study of laser/plasma interactions
Researchers from Lawrence Berkeley National Laboratory and CEA Saclay have developed a particle-in-cell simulation tool that is enabling cutting-edge simulations of laser/plasma coupling mechanisms.

Researchers turn liquid metal into a plasma
For the first time, researchers at the University of Rochester's Laboratory for Laser Energetics (LLE) have found a way to turn a liquid metal into a plasma and to observe the temperature where a liquid under high-density conditions crosses over to a plasma state.

How black holes power plasma jets
Cosmic robbery powers the jets streaming from a black hole, new simulations reveal.

Give it the plasma treatment: strong adhesion without adhesives
A Japanese research team at Osaka University used plasma treatment to make fluoropolymers and silicone resin adhere without any adhesives.

Read More: Plasma News and Plasma Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.