Étude expérimentale de l’écoulement et de l’interaction entre deux rotors contrarotatifs subsoniques
TypeArticles dans des revues avec comité de lecture
Recently, the need for smaller axial‐flow fans with high specific speeds leads to the design of counter‐rotating axial fans. The design of this type 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.
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NOURI, Hussain; RAVELET, Florent; BAKIR, Farid; SARRAF, Christophe; REY, Robert (ASME, 2012)An experimental study on the design of counter-rotating axial-flow fans was carried out. The fans were designed using an inverse method. In particular, the system is designed to have a pure axial discharge flow. The ...
Experimental study of blade rigidity effects on the global and the local performances of a thick blades axial-flow fan NOURI, Hussain; RAVELET, Florent; SARRAF, Christophe; BAKIR, Farid (ASME, 2010)An experimental investigation on the aerodynamic performances of thick blades axial-flow fans was carried out in this study. Two fans are considered, the first one is rotomoulded (in plastic) and the second one is milled ...
NOURI, Hussain; DANLOS, Amélie; RAVELET, Florent; BAKIR, Farid; SARRAF, Christophe (2013)The purpose of this work is to study experimentally the aerodynamic characteristics of a subsonic counter-rotating axial-flow fans system operating in a ducted configuration. The fans of diameter D = 375 mm were designed ...
NOURI, Hussain; RAVELET, Florent; BAKIR, Farid; SARRAF, Christophe (ASME, 2011)An experimental study on counter-rotating axial-flow fans was carried out. The fans of diameter D = 375 mm were designed using an inverse method. The counter-rotating fans operate in a ducted-flow configuration and the ...
Experimental study of blade thickness effects on the global and local performances of a Controlled Vortex Designed axial-flow fan SARRAF, Christophe; NOURI, Hussain; RAVELET, Florent; BAKIR, Farid (2011)The purpose of this work is to study the effects of blade thickness on the performances of an axial-flow fan. Two fans that differ only in the thickness of their blades were studied. The first fan was designed to be part ...