L. Binet, D. Tristant, J.C. Camus, L. Perthuis, D. Pesenti

Shrouded tail rotors found on some helicopters are a french design called Fenestron. Although the rotors provide increased performance, acoustics emissions can be reduced in some in-flight configurations. The purpose of the Fenestron Noise Study program funded by the French Directorate for Civil Aeronautics Programs (DPAC) and based on earlier research contracts is to improve and validate the aerodynamic/acoustic numerical tools dedicated to the analysis and prediction of Fenestron generated noise. The Flight Test Center at Istres and the Eurocopter company are involved in this program that is led by the ONERA Department of Digital Flow Simulation and Aeroacoustics (DSNA).The program has planned for two flight test campaigns. Its purpose is to study the sources of the noise nuisance generated by the Fenestron rotor on the Dauphin 365N helicopter. A first test campaign has been carried out in 2008 but another complementary test campaign will be conducted to take acoustic measurements on the ground. The ONERA computation tools should enable industry to improve the definition of the rotor type Fenestron so that its noise emission is significantly reduced.

35th European Rotorcraft Forum 2009,

Conference Paper

englisch

21,0 x 29,7 cm, 15 Seiten

DGLR-Bericht, 2009, 2009-03, 35th European Rotorcraft Forum 2009 - Conference Proceedings; S.1-15; 2009; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

in getr. Zählung;

noise reduction, tail rotors, rotorcrafts

Bestellbar

2009