Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

€ 10 million for more realistic rotor blade tests

13.01.2016

For a normal test of a prototype rotor blade, the simultaneously occuring loads in the field are simplified. As part of the “Future rotor blade concept” research project, scientists at Fraunhofer IWES are developing new methods that provide significantly more realistic data and allow a load-appropriate design to be produced. The Federal Ministry for Economic Affairs and Energy and the Federal State of Bremen intend to invest € 10 million to further develop methodological expertise and an innovative test infrastructure in Bremerhaven.

Reliable and economical determination of the operational robustness of XXL blades


New testing methods will focusing on sensitive parts of the rotor blade.

Fraunhofer IWES/Diether Hergeth

Better safe than sorry: Since, in reality, only one rotor blade will undergo the complete blade testing procedure right through to certification, the calculative safety factors selected are not necessarily those leading to optimum costs, but rather those which can cope with the operational loads with certainty. A higher number of tests that can be realized at reasonable cost allow the safety margins to be reduced, which, in turn, means a more economical design for the rotor blades.

This is the starting point for the rotor blade experts at Fraunhofer IWES. Separating a blade into segments for testing - e.g. root segment and rotor blade tip - has two advantages: Tests become possible at higher frequencies and with a more accurate load profile. The tests are rendered even more accurate when individual sections with a critically high load and greater material thickness or strong curvatures, for example, are investigated separately. This innovative approach not only produces more informative results, but also reduces the testing times by a calculated 30%, which means a noticeable cost saving.

Test infrastructure to be operational by the middle of 2018

At the conclusion of the first phase of the research project, which will take five years in total, the infrastructure will be operational and the test methods developed. Florian Sayer, head of department, commented on the time frame as follows: “It is a very ambitious schedule, but we can build on ten years of experience with mechanical test methods and a sound understanding of material properties and the behaviour of fibre composites; and the pressure in the industry to innovate is a definite incentive.”

Rotor blade for detailed investigations

While component and blade segment tests are already turning up more and more frequently in the industry’s list of requirements, the testing of critical sections is still a long way off. This is done by dividing the rotor blade according to the requirements of the investigation in order to be able to take a closer look at the critical areas. The subsequent execution of the load tests requires a complex infrastructure and profound knowledge of how complex load cases affect the structure.

A so-called hexapod test stand with a Reynolds platform to apply torsion forces and bending moments in parallel is being constructed in Bremerhaven - right next to the established complete-blade test stands and material testing laboratories. Manufacturers of rotor blades benefit from significantly shorter tests and particularly realistic load simulations, and their modified infrastructure set-up leads to lower energy costs as well.

From the overall perspective of the wind power industry, these test facilities play their part in reducing the energy production costs: When developers have a sure foundation on which they can employ greater creative freedom to develop a blade design optimised for efficiency and reliability, the economic efficiency of wind power utilization and thus its development potential increases.

Weitere Informationen:

http://www.windenergie.iwes.fraunhofer.de/en.html

Britta Rollert | Fraunhofer Institut für Windenergie und Energiesystemtechnik IWES

More articles from Power and Electrical Engineering:

nachricht Did you know that UV light helps to ensure safe bathing during the summer months?
25.07.2016 | Heraeus Noblelight GmbH

nachricht Making magnets flip like cats at room temperature
21.07.2016 | Johannes Gutenberg-Universität Mainz

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

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

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...

Im Focus: A Peek into the “Birthing Room” of Ribosomes

Scaffolding and specialised workers help with the delivery – Heidelberg biochemists gain new insights into biogenesis

A type of scaffolding on which specialised workers ply their trade helps in the manufacturing process of the two subunits from which the ribosome – the protein...

Im Focus: New protocol enables analysis of metabolic products from fixed tissues

Scientists at the Helmholtz Zentrum München have developed a new mass spectrometry imaging method which, for the first time, makes it possible to analyze hundreds of metabolites in fixed tissue samples. Their findings, published in the journal Nature Protocols, explain the new access to metabolic information, which will offer previously unexploited potential for tissue-based research and molecular diagnostics.

In biomedical research, working with tissue samples is indispensable because it permits insights into the biological reality of patients, for example, in...

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

Newly discovered material property may lead to high temp superconductivity

25.07.2016 | Materials Sciences

Did you know that UV light helps to ensure safe bathing during the summer months?

25.07.2016 | Power and Electrical Engineering

Hey robot, shimmy like a centipede

22.07.2016 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>