The ACONIT project: an innovative design approach of active flow control for surge prevention in gas turbines
Communication avec acte
The objective of the ACONIT project is to design, manufacture and test actuators for flow control for an implantation in an aircraft engine. The actuators will fulfil aeronautics requirement in order to increase the Technology Readiness Level (TRL) in this domain. In particular, for the present proposal, one plans to focus on the extension of the stable operating range of axial compressor, allowing thus a reduction of the surge margin through postponing the stall onset. To do so, the first objective of the work is to improve the knowledge of the flow physics of an efficient flow control system by joint numerical and experimental analyses performed in a low speed, single stage axial compressor. The results of this analysis will be used to derive the fluidic specifications for high-TRL actuators and control systems. These specifications will be the base for the design and manufacturing of amplified piezo-electric actuator prototypes whose fluidic performance and operational performance in an environment with vibration and controlled level of temperature will be precisely evaluated before manufacturing final actuators that will be integrated in a full-scale engine test facility. Their performance will be evaluated in terms of Surge Margin Improvement (SMI) as well as in terms of energy balance between the induced consumption and the machine performance improvements. The consortium grouped for carrying out this project is composed of a SME (CTEC), two academic institutions (Bundeswehr University Munich and ENSAM) and a Research Centre (ONERA). It groups skills ranging from internal flow analysis in turbomachinery, to flow control or actuators design, manufacturing and characterisations.
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Article dans une revue avec comité de lectureBARETTER, Alberto; GODARD, Benjamin; JOSEPH, Pierric; ROUSSETTE, Olivier; ROMANÒ, Francesco; BARRIER, Raphael; DAZIN, Antoine (MDPI AG, 2021)On many occasions, fan or compressor stages have to face azimuthal flow distortion at inlet, which affects their performance and stability. These flow distortions can be caused by external events or by some particular ...
Detailed Pressure Measurements During the Transition to Rotating Stall in an Axial Compressor: Influence of the Throttling Process Communication avec acteMARGALIDA, Gabriel; DAZIN, Antoine; JOSEPH, Pierric; ROUSSETTE, Olivier (ASME, 2018)This paper presents experimental unsteady pressure measurements gathered on a single stage axial compressor during pre-stall and transition to stall operations. The aim of this study is to analyze the transition from a ...
Comparison and Sensibility Analysis of Warning Parameters for Rotating Stall Detection in an Axial Compressor Article dans une revue avec comité de lectureMARGALIDA, Gabriel; JOSEPH, Pierric; ROUSSETTE, Olivier; DAZIN, Antoine (MDPI, 2020)The present paper aims at evaluating the surveillance parameters used for early stall warning in axial compressors, and is based on unsteady pressure measurements at the casing of a single stage axial compressor. Two ...
Active flow control in an axial compressor for stability improvement : On the effect of flow control on stall inception Article dans une revue avec comité de lectureMARGALIDA, Gabriel; JOSEPH, Pierric; ROUSSETTE, Olivier; DAZIN, Antoine (Springer Verlag (Germany), 2021)In this paper, the effect of an active flow control system on the onset mechanism of rotating stall in an axial compressor is experimentally investigated. A particular emphasis is thus given on the flow patterns present ...
Quantitative thermal analysis of heat transfer in liquid–liquid biphasic millifluidic droplet flows Article dans une revue avec comité de lectureROMANO, Marta; PRADERE, Christophe; TOUTAIN, Jean; HANY, Cindy; BATSALE, Jean-Christophe (Taylor and Francis, 2014)In this paper, infrared thermography is used to propose a simple quantitative approach toward understanding the thermal behaviour of a liquid–liquid biphasic millifluidic droplet flow under isoperibolic conditions. It is ...