ETRIOLLA
Experimental TRansonic Investigations On Laminar flow and Load Alleviation
| Coordinatore | IBK-INNOVATION GMBH & CO. KG
Organization address
address: REHDORFER STRASSE 4 contact info |
| Nazionalità Coordinatore | Germany [DE] |
| Totale costo | 4˙232˙359 € |
| EC contributo | 3˙174˙269 € |
| Programma | FP7-JTI
Specific Programme "Cooperation": Joint Technology Initiatives |
| Code Call | SP1-JTI-CS-2012-01 |
| Funding Scheme | JTI-CS |
| Anno di inizio | 2013 |
| Periodo (anno-mese-giorno) | 2013-01-01 - 2015-12-31 |
Partecipanti
| # | ||||
|---|---|---|---|---|
| 1 |
IBK-INNOVATION GMBH & CO. KG
Organization address
address: REHDORFER STRASSE 4 contact info |
DE (NUERNBERG) | coordinator | 1˙662˙225.00 |
| 2 |
REVOIND INDUSTRIALE
Organization address
address: VIA CASALE MARCANGELI 13 contact info |
IT (ORICOLA) | participant | 952˙245.00 |
| 3 |
TOTALFORSVARETS FORSKNINGSINSTITUT
Organization address
address: Gullfossgatan 6 contact info |
SE (STOCKHOLM) | participant | 334˙800.00 |
| 4 |
UNIVERSITY OF BRISTOL
Organization address
address: TYNDALL AVENUE SENATE HOUSE contact info |
UK (BRISTOL) | participant | 224˙999.84 |
Mappa
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Obiettivo del progetto (Objective)
'The proposal tackles the CfP JTI-CS-2012-1-GRA-02-019. Within the project a Wind-Tunnel-Model is designed, built and tested that is capable of being tested with two main purposes: - access the extend of laminarity on the wing - evaluate the performance of LC&A system in the trailing edge of the wing In order to do this the project tackles different points: - a model design is performed that creates a wind-tunnel model with an elastic behaviour comparable to the full-scale wing. This model is as big as possible, although fulfilling all specifications in terms of wind-tunnel restrictions (size, maximum force) in order to allow a hig Reynolds-Number and therefore allow to assess the laminar extend on the wing during the tests in a way that the results are comparable to the full-scale tests. - a first possible LC&A solution which is input to the project is evaluated and optimized and compared with a solution, that was newly designed and optimized LC&A within the project. The best solution is scaled down to model scale and implemented into the model. Within the tests step/ gaps and contaminats are introduced to the model in order to evaluate the stability of the laminar behaviour of the wing with respect to this parameters. In the second test-phase the LC&A devices are used in order to modify the load-distribution on the wing. Before testing the model-wing a ground-vibration test is performed in order to show that the model can be operated safely in the wind-tunnel.'
Introduzione (Teaser)
The Green Regional Aircraft (GRA) is set to meet demanding criteria for weight reduction and increased aerodynamic and energy efficiency, reducing fuel consumption and emissions. Scientists are developing a realistic model of its wing for wind tunnel testing.
Descrizione progetto (Article)
Air travel continues to increase with increasing globalisation, bringing both people and cargo to distant destinations for pleasure and business. Fuel consumption high in the atmosphere releases emissions where they have the largest and most immediate effect on global climate.
The European Clean Sky initiative is the EU's most ambitious aeronautical research programme ever. It is a unique public-private partnership to significantly decrease the environmental impact of flight, and the GRA is one of its platforms. The EU is funding the ETRIOLLA (Experimental transonic investigations on laminar flow and load alleviation) project to develop a realistic wind tunnel model to test a novel wing concept for the GRA.
The wing is designed to facilitate natural laminar flow (NLF) that will reduce drag as well as for load control and alleviation (LC&A) to manage passive gusts of wind and reduce weight on the plane. Both will reduce fuel consumption and emissions.
ETRIOLLA has faced and overcome important challenges to make the wing model as realistic as possible given the constraints of wind tunnel testing. The model is as large as possible to generate high Reynolds numbers (associated with turbulent flow) yet fit within the geometric confines of the wind tunnel.
More than 40 global and partial structural models were assessed, resulting in selection of a wind tunnel candidate configuration. However, subsequent studies showed that a conventional wind tunnel model with full strength and stiffness could not fulfil requirements, bringing the team back to the drawing board. Scientists came up with an innovative solution that increases bending stiffness and reduces torsional stiffness.
The team evaluated optimisation of two LC&A device settings and chose the one that increased performance under cruise conditions. All materials have been ordered and partners have begun the manufacturing process. Preliminary models for virtual testing preceding the actual wind tunnel testing have been developed.
ETRIOLLA expects to answer important open questions about NLF and LC&A devices for the GRA wings. This will increase the EU's competitiveness in both the associated technologies and as airlines with minimal environmental impact in an increasingly eco-friendly consumer society.