Numerical Analysis of a Novel Twin-Impeller Centrifugal Compressor
Article dans une revue avec comité de lecture
Centrifugal compressors are widely used in many industrial fields such as automotive, aviation, aerospace. However, these turbomachines suffer instability phenomenon when the flow rate is too high or too low, called rotating stall and surge. These phenomena cause the operation failure, pressure fluctuations and vibrations of the thorough system. Numerous mechanical solutions have been presented to minimize these instabilities and expand the operating range towards low-flow rates like active control of the flow path, variable inlet guide vane and casing treatment. Currently, our team has developed a novel compressor composed of a twin-impeller powered by autonomous systems. We notice the performance improvement and instabilities suppression of this compressor experimentally. In this paper, an active control method is introduced by controlling the speed and rotation direction of the impellers to expand the operating range. A CFD study is then conducted to analysis flow morphology and thermodynamic characteristics based on the experimental observations at three special points. Numerical results and experimental measurements of compressor maps are consistent.
Showing items related by title, author, creator and subject.
CFD Analysis to explain the Operating range extension observed during Operation in Co-rotating Mode of a Twin-impeller Centrifugal Compressor Article dans une revue avec comité de lectureNGUYEN, Van-Thang; DANLOS, Amelie; RAVELET, Florent; DELIGANT, Michael; SOLIS, Moises; KHELLADI, Sofiane; BAKIR, Farid (EDP Sciences, 2021-11)Centrifugal compressors are widely used in many industrial applications because of their advantages. However, these turbomachines suffer at a low-flow rate from instabilities, such as rotating stall and surge. That leads ...
Article dans une revue avec comité de lectureNGUYEN, Van-Thang; ABED, Cheikh Brahim; DANLOS, Amelie; RAVELET, Florent; PARIDAENS, Richard; DELIGANT, Michael; KHELLADI, Sofiane; BAKIR, Farid (American Society of Mechanical Engineers, 2021-10-13)The present study deals with a low pressure-ratio centrifugal compressor consisting of two counter-rotating rotors called a Counter-Rotating Centrifugal Compressor (CRCC). The design method based on the loss model was ...
Etude numérique des gains de performances et de capacité d'aspiration apportés par un étage axial contra-rotatif par rapport à une pompe mono-rotor. Communication avec acteDANLOS, Amélie; RAVELET, Florent; SOLIS, Moises; BAKIR, Farid (2013)This study deals with the development of an efficient method of design for subsonic conter-rotating axial flow turbomachineries. From specifications of a reference axial pump with only one rotor, two configurations of ...
Experimental and Numerical Analysis of the Flow Inside a Configuration Including an Axial Pump and a Tubular Exchanger Communication avec acteSOLIS, Moises; RAVELET, Florent; KHELLADI, Sofiane; BAKIR, Farid (ASME, 2010)In centrifugal and axial pumps, the flow is characterized by a turbulent and complex behavior and also by physical mechanisms such as cavitation and pressure fluctuations that are mainly due to the strong interactions ...
Communication avec acteTOMOV, Petar; DANLOS, Amélie; KHELLADI, Sofiane; RAVELET, Florent; SARRAF, Christophe; BAKIR, Farid (IOP sciences conference series, 2015)The fact of injecting bubbles into a cavitating flow influences typical cavitating behavior. Cavitation and aerated cavitation experiments has been carried out on a symmetrical venturi nozzle with convergent/divergent ...