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

Abstract : Recently, the need for smaller axial fans with high specific speeds lead 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. This dissertation is organized in four parts: rotor-stator and rotor-rotor stages design; design of the experimental facility, AERO²FANS allowing global performance and local unsteady measurements; comparison between the two stages and design validation; investigation on the effects of the rotation ratio and the axial spacing on the global and the local performances.
Document type :
Theses
Complete list of metadatas

Cited literature [88 references]  Display  Hide  Download

https://pastel.archives-ouvertes.fr/tel-00795114
Contributor : Abes Star <>
Submitted on : Monday, June 17, 2013 - 12:30:21 PM
Last modification on : Wednesday, May 29, 2019 - 5:53:23 PM
Long-term archiving on : Wednesday, September 18, 2013 - 4:12:54 AM

File

NOURI_-_Hussain.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-00795114, version 2

Collections

Citation

Hussain Nouri. Etude expérimentale de l'écoulement et de l'interaction entre deux rotors contrarotatifs subsoniques. Autre. Ecole nationale supérieure d'arts et métiers - ENSAM, 2012. Français. ⟨NNT : 2012ENAM0053⟩. ⟨tel-00795114v2⟩

Share

Metrics

Record views

660

Files downloads

3061