Objective The long-term objective of the SNAAP project is to enable The European aircraft industry to design quieter propeller-driven aircraft providing for improved passenger comfort and reduced environmental noise. For propeller-driven systems, considerable effort is required to understand the mechanisms responsible for the noise generation on the propeller blade and for the associated mathematic modelling. The main objectives of this project are: the identification of the acoustic sources on advanced propeller and propfans, modelling the mechanisms responsible for the sound generation and its propagation, development and validation of an aeroacoustic code capable of predictions of propeller noise in the near field and far field.To achieve this, two propeller configurations will be investigated. The first will be an advanced propeller designed for a cruise Mach number of 0.7 and the second a swept propfan type operating at a cruise Mach number of 0.8 such as has been designed during the pilot phase of the Brite/Euram Gemini project. The proposed objectives will be accomplished by a series of specific tasks which will address the required theoretical and experimental development aspects and will define the scaling philosophy, the design, manufacture and instrumentation of propeller models capable of withstanding the stress due to the test conditions. In addition, the testing procedures and techniques for the analysis of the acoustic, aerodynamic and vibration data to be acquired in the tests will be established. In parallel with this the theoretical activity will develop both an aerodynamic and an acoustic code. The former will be based on Euler techniques and will provide input data essential for the acoustic code. The acoustic code will comprise of several modules each of which will account for different acoustic sources. Techniques for identifying the different acoustic sources from the test data will be developed. The codes will be validated and refined using the experimental data. Fields of science engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaircraftnatural sciencesphysical sciencesacousticsengineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaeronautical engineering Programme(s) FP3-AERO 1C - Specific programme of research and technological development in the field of industrial and materials technologies - Aeronautics research -, 1990-1994 Topic(s) Data not available Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator Alenia Aerospazio - Un' Azienda Finmeccanica SpA Address Viale dell'aeronautica 1 80038 Pomigliano d'arco Italy See on map EU contribution € 0,00 Participants (15) Sort alphabetically Sort by EU Contribution Expand all Collapse all Aircraft Research Association Ltd United Kingdom EU contribution € 0,00 Address Manton lane MK41 7PF Bedford See on map Aérospatiale Société Nationale Industrielle SA France EU contribution € 0,00 Address 316 route de bayonne 31060 Toulouse See on map Centro Italiano Ricerche Spaziali SpA Italy EU contribution € 0,00 Address Via maiorise - localita silvagni 81043 Capua See on map Dornier Luftfahrt GmbH Germany EU contribution € 0,00 Address An der bundesstraße 31 88039 Friedrichshafen See on map Dowty Defence and Air Systems Ltd United Kingdom EU contribution € 0,00 Address Anson business park cheltenham road GL2 9QN Gloucester See on map Fokker Aircraft BV Netherlands EU contribution € 0,00 Address 1117 ZJ Schiphol oost See on map Hoffman Propellers Germany EU contribution € 0,00 Address Küpferlingstraße 9 83022 Rosenheim See on map IBK INGENIEUR BUERO - DR GUENTER KRETZSCHMAR Germany EU contribution € 0,00 Address Eichendorffstrasse 120 90491 Nuernberg See on map Instituto Superior Técnico Portugal EU contribution € 0,00 Address Av. rovisco pais 1096 Lisboa See on map Nationaal Lucht- en Ruimtevaart Laboratorium Netherlands EU contribution € 0,00 Address 31,voorsterweg 8316 PR Marknesse See on map Office National d'Études et de Recherches Aérospatiales (ONERA) France EU contribution € 0,00 Address 29 avenue de la division leclerc 92322 Châtillon See on map RATIER-FIGEAC SA France EU contribution € 0,00 Address Route de cahors 46101 Figeac See on map Stichting Duits Nederlandse Windtunnel Netherlands EU contribution € 0,00 Address 8300 AD Emmeloord See on map THE PROVOST, FELLOWS AND SCHOLARS OF THE COLLEGE OF THE HOLY AND UNDIVIDED TRINITY OF QUEEN ELIZABETH NEAR DUBLIN HEREINAFTER TRINITY COLLEGE DUBLIN Ireland EU contribution € 0,00 Address Parsons building, trinity college 2 Dublin See on map University College Galway Ireland EU contribution € 0,00 Address 90 Galway See on map