Featured Research

from universities, journals, and other organizations

Shifting winds in turbine arrays

Date:
October 22, 2013
Source:
American Institute of Physics (AIP)
Summary:
Researchers modeling how changes in air flow patterns affect wind turbines’ output power have found that the wind can supply energy from an unexpected direction: below.

Experimental "isocontours" data show the mean streamwise velocity along the center line of a scaled wind turbine array.
Credit: J.Newman/RPI

Researchers modeling how changes in air flow patterns affect wind turbines' output power have found that the wind can supply energy from an unexpected direction: below.

According to the researchers, who report their results in the journal Physics of Fluids, many wind turbine array studies overlook the fact that important airflow changes occur inside the array.

"We discovered that a typical measure of the significance of flow changes was rather deficient," says Jensen Newman, co-author of the paper and a graduate student at Rensselaer Polytechnic Institute's Department of Mathematical Sciences. Inspired by a desire to describe the flow experienced by realistic wind turbine arrays in greater detail, the team created a model of how flow affects wind turbines' output power.

The researchers introduced a mathematical way to measure changes in the flow that gives a more accurate representation of the magnitude of these changes than other current measures. "It shows that in addition to energy being made available to the turbines from above, energy is also transferred from below," Newman explains.

The tools and methodologies developed by the team for calculating changes in the flow can now be applied to other studies -- for any type of flow with a repetitive pattern. Since they were also able to show that energy comes from below the rotors, it may be possible to exploit this by developing wind farms that draw more heavily on this previously unidentified source of energy.

Going forward the researchers plan to further expand the scope of their model. "We'll apply this analysis to the case of two-bladed vs. three-bladed turbines to identify the critical differences in flow patterns and how these affect turbine power production," says Newman. "Similar analysis will be performed using much larger turbines to examine how the physics discovered here scale with turbine size so that the extrapolation of the results to full-scale wind farms can be better understood."


Story Source:

The above story is based on materials provided by American Institute of Physics (AIP). Note: Materials may be edited for content and length.


Journal Reference:

  1. Jensen Newman, Jose Lebron, Charles Meneveau, Luciano Castillo. Streamwise development of the wind turbine boundary layer over a model wind turbine array. Physics of Fluids, 2013; 25 (8): 085108 DOI: 10.1063/1.4818451

Cite This Page:

American Institute of Physics (AIP). "Shifting winds in turbine arrays." ScienceDaily. ScienceDaily, 22 October 2013. <www.sciencedaily.com/releases/2013/10/131022131649.htm>.
American Institute of Physics (AIP). (2013, October 22). Shifting winds in turbine arrays. ScienceDaily. Retrieved October 22, 2014 from www.sciencedaily.com/releases/2013/10/131022131649.htm
American Institute of Physics (AIP). "Shifting winds in turbine arrays." ScienceDaily. www.sciencedaily.com/releases/2013/10/131022131649.htm (accessed October 22, 2014).

Share This



More Matter & Energy News

Wednesday, October 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Thanks, Marty McFly! Hoverboards Could Be Coming In 2015

Thanks, Marty McFly! Hoverboards Could Be Coming In 2015

Newsy (Oct. 21, 2014) If you've ever watched "Back to the Future Part II" and wanted to get your hands on a hoverboard, well, you might soon be in luck. Video provided by Newsy
Powered by NewsLook.com
Robots to Fly Planes Where Humans Can't

Robots to Fly Planes Where Humans Can't

Reuters - Innovations Video Online (Oct. 21, 2014) Researchers in South Korea are developing a robotic pilot that could potentially replace humans in the cockpit. Unlike drones and autopilot programs which are configured for specific aircraft, the robots' humanoid design will allow it to fly any type of plane with no additional sensors. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
Graphene Paint Offers Rust-Free Future

Graphene Paint Offers Rust-Free Future

Reuters - Innovations Video Online (Oct. 21, 2014) British scientists have developed a prototype graphene paint that can make coatings which are resistant to liquids, gases, and chemicals. The team says the paint could have a variety of uses, from stopping ships rusting to keeping food fresher for longer. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
China Airlines Swanky New Plane

China Airlines Swanky New Plane

Buzz60 (Oct. 21, 2014) China Airlines debuted their new Boeing 777, and it's more like a swanky hotel bar than an airplane. Enjoy high-tea, a coffee bar, and a full service bar with cocktails and spirits, and lie-flat in your reclining seats. Sean Dowling (@SeanDowlingTV) has the details. Video provided by Buzz60
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:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

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