Featured Research

from universities, journals, and other organizations

Air safety and wake vortices

Date:
November 1, 2012
Source:
SINTEF
Summary:
Researchers are working on monitoring vortices created by aircraft during take-off and landing. The objective is both to maintain the level of safety and to improve the capacity of airports.

During take-off and landing, strong vortices are produced in the air on both sides of large aircraft.
Credit: SESAR

Researchers are working on monitoring vortices created by aircraft during take-off and landing. The objective is both to maintain the level of safety and to improve the capacity of airports.

During take-off and landing, strong vortices are produced in the air on both sides of large aircraft because of the pressure difference between the upper and lower sides of the wings. These so-called "wake vortices" can be dangerous because they are invisible, may be very fast-moving and extend many kilometres behind the aircraft.

Following aircraft can be affected by a powerful, rotating air movement and wake vortices have been the cause of several crashes. For this reason a distance of 11 kilometres must be maintained between aircraft taking off and landing.

Research scientists are now tackling this problem, both from a point of view of safety and in order to achieve a better flow of traffic. The objectives of the important EU programme "SESAR" are to reduce the congestion in European airspace, improve flight punctuality and reduce the impact of air transport on the climate. The programme consists of a total of 16 work packages, and SINTEF research scientists are participating in Work Package 12.2.2, which is studying wake vortices.

More frequent aircraft landings

"These vortices are clearly one of the causes of the delays which afflict air traffic," says Karstein Sψrli, a Senior Research Scientist at SINTEF ICT. The research team is also working on terrain-induced turbulence, and in collaboration with the Norwegian Meteorological Institute it has initiated a turbulence warning system serving 19 airports in Norway.

Svalbard Airport Longyearbyen will become the twentieth in December this year. The SINTEF research team's many years of R&D effort in this field were decisive in its becoming involved in the SESAR project.

In the SESAR programme, the team is involved in work to develop a system-oriented prototype which will be capable of improving the traffic capacity of airports. Instead of the rigid rules regarding a fixed distance between landing aircraft, the intention is to create a more dynamic, weather-dependent system.

Flight controllers shall be able to assess flight arrivals on the basis of local conditions such as winds crossing airport runways. Under crosswind conditions wake vortices from an aircraft which has just landed will dissipate rapidly and will therefore not present a danger. Hence the next aircraft can land sooner.

Mathematical models

"Wake vortices are affected by, among other things, "wind shear" and turbulence in the airspace near the airport," says Karstein Sψrli. "We use mathematical methods to simulate the way air currents behave in calm and rough weather, and emphasise the importance of being able to predict turbulence under given weather conditions and the influence of terrain and buildings in the vicinity of airport runways."

Interaction between measured data and models The test locations being studied are Charles de Gaulle Airport in Paris and Frankfurt Airport. Here, comprehensive measurement campaigns are being carried out using different types of equipment such as radar and LIDAR laser technology.

The interplay between the measured data describing the current situation and the research scientists' mathematical models forms the essence of the prototype which is being developed by the project.

The Thales group has overall responsibility for both the measurement campaigns and the project. Other participants are Indra, DFS and EUROCONTROL. The project will run until 2016.


Story Source:

The above story is based on materials provided by SINTEF. The original article was written by Εse Dragland. Note: Materials may be edited for content and length.


Cite This Page:

SINTEF. "Air safety and wake vortices." ScienceDaily. ScienceDaily, 1 November 2012. <www.sciencedaily.com/releases/2012/11/121101073006.htm>.
SINTEF. (2012, November 1). Air safety and wake vortices. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2012/11/121101073006.htm
SINTEF. "Air safety and wake vortices." ScienceDaily. www.sciencedaily.com/releases/2012/11/121101073006.htm (accessed July 31, 2014).

Share This




More Matter & Energy News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Britain Testing Driverless Cars on Roadways

Britain Testing Driverless Cars on Roadways

AP (July 30, 2014) — British officials said on Wednesday that driverless cars will be tested on roads in as many as three cities in a trial program set to begin in January. Officials said the tests will last up to three years. (July 30) Video provided by AP
Powered by NewsLook.com
7 Ways to Use Toothpaste: Howdini Hacks

7 Ways to Use Toothpaste: Howdini Hacks

Howdini (July 30, 2014) — Fresh breath and clean teeth are great, but have you ever thought, "my toothpaste could be doing more". Well, it can! Lots of things! Howdini has 7 new uses for this household staple. Video provided by Howdini
Powered by NewsLook.com
Amid Drought, UCLA Sees Only Water

Amid Drought, UCLA Sees Only Water

AP (July 30, 2014) — A ruptured 93-year-old water main left the UCLA campus awash in 8 million gallons of water in the middle of California's worst drought in decades. (July 30) Video provided by AP
Powered by NewsLook.com
Smartphone Powered Paper Plane Debuts at Airshow

Smartphone Powered Paper Plane Debuts at Airshow

AP (July 30, 2014) — Smartphone powered paper airplane that was popular on crowdfunding website KickStarter makes its debut at Wisconsin airshow (July 30) Video provided by AP
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