Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

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

13.05.2014

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.


This shows the flow field around the plasma actuator.

Credit: ©Science China Press

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).

... more about:
»Astronomy »CAS »Exploration »SCP »UAV »temperature

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.

###

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/

ZHANG Xin | Eurek Alert!

Further reports about: Astronomy CAS Exploration SCP UAV temperature

More articles from Physics and Astronomy:

nachricht Astronomers discover dizzying spin of the Milky Way galaxy's 'halo'
26.07.2016 | NASA/Goddard Space Flight Center

nachricht Lonely Atoms, Happily Reunited
26.07.2016 | Technische Universität Wien

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Self-assembling nano inks form conductive and transparent grids during imprint

Transparent electronics devices are present in today’s thin film displays, solar cells, and touchscreens. The future will bring flexible versions of such devices. Their production requires printable materials that are transparent and remain highly conductive even when deformed. Researchers at INM – Leibniz Institute for New Materials have combined a new self-assembling nano ink with an imprint process to create flexible conductive grids with a resolution below one micrometer.

To print the grids, an ink of gold nanowires is applied to a substrate. A structured stamp is pressed on the substrate and forces the ink into a pattern. “The...

Im Focus: The Glowing Brain

A new Fraunhofer MEVIS method conveys medical interrelationships quickly and intuitively with innovative visualization technology

On the monitor, a brain spins slowly and can be examined from every angle. Suddenly, some sections start glowing, first on the side and then the entire back of...

Im Focus: Newly discovered material property may lead to high temp superconductivity

Researchers at the U.S. Department of Energy's (DOE) Ames Laboratory have discovered an unusual property of purple bronze that may point to new ways to achieve high temperature superconductivity.

While studying purple bronze, a molybdenum oxide, researchers discovered an unconventional charge density wave on its surface.

Im Focus: Mapping electromagnetic waveforms

Munich Physicists have developed a novel electron microscope that can visualize electromagnetic fields oscillating at frequencies of billions of cycles per second.

Temporally varying electromagnetic fields are the driving force behind the whole of electronics. Their polarities can change at mind-bogglingly fast rates, and...

Im Focus: Continental tug-of-war - until the rope snaps

Breakup of continents with two speed: Continents initially stretch very slowly along the future splitting zone, but then move apart very quickly before the onset of rupture. The final speed can be up to 20 times faster than in the first, slow extension phase.phases

Present-day continents were shaped hundreds of millions of years ago as the supercontinent Pangaea broke apart. Derived from Pangaea’s main fragments Gondwana...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

GROWING IN CITIES - Interdisciplinary Perspectives on Urban Gardening

15.07.2016 | Event News

SIGGRAPH2016 Computer Graphics Interactive Techniques, 24-28 July, Anaheim, California

15.07.2016 | Event News

Partner countries of FAIR accelerator meet in Darmstadt and approve developments

11.07.2016 | Event News

 
Latest News

New material could advance superconductivity

28.07.2016 | Materials Sciences

CO2 can be stored underground for 10 times the length needed to avoid climatic impact

28.07.2016 | Earth Sciences

The intravenous swim team

28.07.2016 | Medical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>