Featured Research

from universities, journals, and other organizations

How hypergravity impacts electric arcs

Date:
December 18, 2013
Source:
Springer Science+Business Media
Summary:
A new study on electric discharge behavior under intense gravitational forces shows that its dynamic changes as gravity increases. Arc discharges are common in everyday conditions like welding or in lightning storms. But in altered gravity, not as much is known about the behavior of electric discharges.

A new study on electric discharge behaviour under intense gravitational forces shows that its dynamic changes as gravity increases.

Arc discharges are common in everyday conditions like welding or in lightning storms. But in altered gravity, not as much is known about the behaviour of electric discharges. For the first time, Jiří Šperka from Masaryk University, Czech Republic, and his Dutch colleagues studied the behaviour of a special type of arc discharge, so-called glide arc, in varying hypergravity conditions, up to 18 G. In a paper just published in The European Physical Journal D, they demonstrate how the plasma channel of this glide arc discharge moves due to external forces of buoyancy in varying gravity conditions. These results could have implications for improved safety precautions in manned space flights, and in the design of ion thrusters used for spacecraft propulsion.

Though electric discharges can be affected by gravity, the electromagnetic forces between charged particles are typically much stronger than any gravitational forces. Therefore, in order to understand this effect, the authors designed an experimental device to perform measurements on atmospheric pressure glide arc helium plasma under the forces of hypergravity.

They changed the buoyancy force acting on the plasma channel of the glide arc while maintaining a constantly low external gas flow. To do so they relied on the Large Diameter Centrifuge at the European Space Agency's European space research and technology centre (ESTEC) facility in Noordwijk, the Netherlands.

They found that gravity strongly influences the glide arc discharge. These effects stem from thermal buoyancy, which increases with gravity. As such, increasing the centrifugal acceleration of gravity makes the glide arc movement substantially faster. Whereas at 1 G the discharge was stationary, at 6 G it glides with 7 Hz frequency and at 18 G that number rises to 11 Hz. The authors thus established a simple model for the glide arc movement assuming low gas flow velocities, which they validated with experimental results.


Story Source:

The above story is based on materials provided by Springer Science+Business Media. Note: Materials may be edited for content and length.


Journal Reference:

  1. Jiří Šperka, Pavel Souček, Jack J. W. A. Loon, Alan Dowson, Christian Schwarz, Jutta Krause, Gerrit Kroesen, Vít Kudrle. Hypergravity effects on glide arc plasma. The European Physical Journal D, 2013; 67 (12) DOI: 10.1140/epjd/e2013-40408-7

Cite This Page:

Springer Science+Business Media. "How hypergravity impacts electric arcs." ScienceDaily. ScienceDaily, 18 December 2013. <www.sciencedaily.com/releases/2013/12/131218095849.htm>.
Springer Science+Business Media. (2013, December 18). How hypergravity impacts electric arcs. ScienceDaily. Retrieved July 29, 2014 from www.sciencedaily.com/releases/2013/12/131218095849.htm
Springer Science+Business Media. "How hypergravity impacts electric arcs." ScienceDaily. www.sciencedaily.com/releases/2013/12/131218095849.htm (accessed July 29, 2014).

Share This




More Matter & Energy News

Tuesday, July 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Lithium Battery 'Holy Grail' Could Provide 4 Times The Power

Lithium Battery 'Holy Grail' Could Provide 4 Times The Power

Newsy (July 28, 2014) — Stanford University published its findings for a "pure" lithium ion battery that could have our everyday devices and electric cars running longer. Video provided by Newsy
Powered by NewsLook.com
The Carbon Trap: US Exports Global Warming

The Carbon Trap: US Exports Global Warming

AP (July 28, 2014) — AP Investigation: As the Obama administration weans the country off dirty fuels, energy companies are ramping-up overseas coal exports at a heavy price. (July 28) Video provided by AP
Powered by NewsLook.com
Shipping Crates Get New 'lease' On Life

Shipping Crates Get New 'lease' On Life

Reuters - Business Video Online (July 25, 2014) — Shipping containers have been piling up as America imports more than it exports. Some university students in Washington D.C. are set to get a first-hand lesson in recycling. Their housing is being built using refashioned shipping containers. Lily Jamali reports. Video provided by Reuters
Powered by NewsLook.com
Europe's Highest Train Turns 80 in French Pyrenees

Europe's Highest Train Turns 80 in French Pyrenees

AFP (July 25, 2014) — Europe's highest train, the little train of Artouste in the French Pyrenees, celebrates its 80th birthday. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins