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European Program for Transition Prediction

Objective



Objectives and content EUROTRANS, the European programme on Transition prediction, is a continuing technology research started with Brite Euram ELFIN I and ELFIN II programmes. The main objectives are to analyse and to improve the laminar-turbulent transition prediction methods, both from a fundamental point of view and for practical applications.

EUROTRANS is divided in two tasks
- Task 1 deals with transition prediction using the local, linear stability theory and the well known en method.

For this purpose, experimental data obtained during the ELFIN II wind tunnel tests will be selected and analysed carefully with the objective of obtaining correlated n factors at the onset of transition Task 1 will also include two subtasks devoted to the improvement of a simplified method for transition prediction and to the application of the local theory for complex basic flows resulting from Navier-Stokes computations;
Task 2 consists in applying more general and more complex approaches based on non local methods in order to demonstrate their feasibility for practical problems. The first step will be to choose a limited number of significant test cases of Task 1 and of ELFIN I and ELFIN II flight experiments.

These test cases will be evaluated first with the non local, linear approach and the resulting transition n factors will be compared with those obtained in Task 1. It is then planned to perform non local, non linear computations for typical test cases exhibiting strong interactions between cross flow and Tollmien-Schlichting disturbances. It is hoped that these computations would explain why the local theory fails in certain cases to predict the onset of transition.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES
Address
2,Avenue De La Division Leclerc, 29
92322 Chatillon
France

Participants (10)

Alenia Aerospazio - Un'Azienda Finmeccanica SpA
Italy
Address
Viale Dell'aeronautica
80038 Pomigliano D'arco - Napoli
Centro Italiano Ricerche Aerospaziali ScpA
Italy
Address
Via Maiorise
81043 Capua
Dassault Aviation SA
France
Address
78 Quai Marcel Dassault
92552 Saint-cloud
Defence Evaluation and Research Agency (DERA)
United Kingdom
Address

GU14 6TD Farnborough
Dornier Luftfahrt GmbH
Germany
Address

82230 Wessling
FFA - THE AERONAUTICAL RESEARCH INSTITUTE OF SWEDEN
Sweden
Address
Ranhammaarsvaegen, 12/14
161 11 Bromma
GERMAN AEROSPACE CENTRE
Germany
Address
Bunsenstraße 10
37073 Goettingen
INSTITUTO SUPERIOR TECNICO
Portugal
Address
Avenida Rovisco Pais, Pav. Mecanica 1-2°
1049-001 Lisboa
N/A
Saab AB
Sweden
Address

581 88 Linköping