Étude expérimentale de l'écoulement et de l'interaction entre deux rotors contrarotatifs subsoniques

Abstract

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible.This is an author-deposited version published in: http://sam.ensam.eu Handle ID: .http://hdl.handle.net/10985/8509 To cite this version :Hussain NOURI, Florent RAVELET, Farid BAKIR -Étude expérimentale de l'écoulement et de l'interaction entre deux rotors contrarotatifs subsoniques -La Houille Blanche -Vol. 2014, n°3, p.13-26 -2014 Any correspondence concerning this service should be sent to the repository Administrator : archiveouverte@ensam.eu ÉTUDE EXPERIMENTALE DE L'ECOULEMENT ET DE L'INTERACTION ENTRE DEUX ROTORS CONTRAROTATIFS SUBSONIQUES EXPERIMENTAL STUDY OF THE FLOW AND THE INTERACTION IN-BETWEEN TWO COUNTER-ROTATING SUBSONIC AXIAL-FLOW FANSRecently, the need for smaller axial fans with high specific speeds leads to the design of counter-rotating axial fans. The design of this kind of machines, which have promising aerodynamic performances, suffers from a lack of knowledge about their aerodynamics. Counter-rotating rotors, widely studied in aeronautics, are an effective alternative to conventional machines and offer many advantages: rotation ratio and diameter reduction, and high flexibility in use. However, a better understanding of their working and of the rotors interaction is required to enhance their design and to make them widely integrated in current applications. This experimental research work investigates on a ducted counter-rotating stage designed with a home code, MFT based on an inverse design method for rotors and rotor-stator stages, and to which a rapid and simple method is implemented to design the rear rotor. The study focuses on the effects of the rotation ratio and on the axial spacing between rotors. It highlights several aspects of the rotors interaction through global performance and local unsteady measurements.