Study of Noise and Aerodynamics of Advanced Propellers

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 technology › mechanical engineering › vehicle engineering › aerospace engineering › aircraft
• natural sciences › physical sciences › acoustics
• engineering and technology › mechanical engineering › vehicle engineering › aerospace engineering › aeronautical engineering
• humanities › philosophy, ethics and religion › philosophy

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

Participants (15)

Aircraft Research Association Ltd

United Kingdom

Address

Manton Lane
MK41 7PF Bedford

Aérospatiale Société Nationale Industrielle SA

France

Address

316 Route De Bayonne
31060 Toulouse

Centro Italiano Ricerche Spaziali SpA

Italy

Address

Via Maiorise - Localita Silvagni
81043 Capua

Dornier Luftfahrt GmbH

Germany

Address

An Der Bundesstraße 31
88039 Friedrichshafen

Dowty Defence and Air Systems Ltd

United Kingdom

Address

Anson Business Park Cheltenham Road
GL2 9QN Gloucester

Fokker Aircraft BV

Netherlands

Address

1117 ZJ Schiphol Oost

Hoffman Propellers

Germany

Address

Küpferlingstraße 9
83022 Rosenheim

IBK INGENIEUR BUERO - DR GUENTER KRETZSCHMAR

Germany

Address

Eichendorffstrasse 120
90491 Nuernberg

Instituto Superior Técnico

Portugal

Address

Av. Rovisco Pais
1096 Lisboa

Nationaal Lucht- en Ruimtevaart Laboratorium

Netherlands

Address

31,voorsterweg
8316 PR Marknesse

Office National d'Études et de Recherches Aérospatiales (ONERA)

France

Address

29 Avenue De La Division Leclerc
92322 Châtillon

RATIER-FIGEAC SA

France

Address

Route De Cahors
46101 Figeac

Stichting Duits Nederlandse Windtunnel

Netherlands

Address

8300 AD Emmeloord

THE PROVOST, FELLOWS AND SCHOLARS OF THE COLLEGE OF THE HOLY AND UNDIVIDED TRINITY OF QUEEN ELIZABETH NEAR DUBLIN HEREINAFTER TRINITY COLLEGE DUBLIN

Ireland

Address

Parsons Building, Trinity College
2 Dublin

University College Galway

Ireland

Address

90 Galway