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RISExperimental Study of Surge Precursors in a High Speed Multistage Compressor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Pressure measurements using high frequency response sensors have been carried out on the third rotor of the 3.5stage high speed compressor CREATE (rotation speed: 11,543 RPM, Rotor 1 tip speed: 313 m/s) over the complete ...
Leakage Flow Impact on Shrouded Stator Cavity Flow Topology and Associated High-Speed Axial Compressor Stage Performance
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents the investigation of realistic cavity leakage flow for the von Karman Institute for Fluid Dynamics H25 axial compressor stage, equipped with a shroud cavity of average Reynolds number Rer = 2.2 * 106 ...
Numerical Simulation of Aerodynamic Instabilities in a Multistage High Speed High Pressure Compressor on Its Test Rig—Part II: Deep Surge
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Aerodynamic instabilities such as stall and surge may occur in compressors, possibly leading to mechanical failures so their avoidance is crucial. A better understanding of those phenomena and an accurate prediction are ...
Corner Separation Dynamics in a Linear Compressor Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper considers the inherent unsteady behavior of the three-dimensional (3D) separation in the corner region of a subsonic linear compressor cascade equipped of 13 NACA 65-009 profile blades. Detailed experimental ...
Compressible Modal Instability Onset in an Aerodynamically Mistuned Transonic Fan
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper describes observed modal oscillations arising from a feedback mechanism between an acoustic resonance in the exit flow channel and aerodynamic and aeroelastic disturbances in a transonic fan stage. During tests, ...
UHBR Open-Test Case Fan ECL5/CATANA: Non-Linear Analysis of Non-Synchronous Blade Vibration at Part-Speed Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The onset of non-synchronous vibrations has been predicted for a composite open-test-case UHBR fan geometry by time-linearized simulations at part-speed conditions. In the current study, time-accurate simulations with ...
Numerical Characterization of an High Pressure Compressor Stage Equipped With a Closed Shrouded Stator Cavity
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In axial compressors, shrouded stator cavity flows are responsible for performance degradation due to their interaction with the power stream. The present paper aims at exploring the possibility of employing a single-stage ...
On Using Fast Response Pressure Sensors in Aerodynamic Probes to Measure Total Temperature and Entropy Generation in Turbomachinery Blade Rows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This contribution addresses the possibility of exploiting the temperature dependency of piezoresistive sensors as a temperature measurement per se. This requires the characterization of the sensor, or the probe as a ...
Aerodynamic Investigation of a Composite Low-Speed Fan for UHBR Application
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A composite fan stage representative of a modern Ultra High Bypass Ratio (UHBR) architecture has been investigated experimentally on a novel test facility at Ecole Centrale de Lyon. These measurements show indications for ...
Experiments on Tuned UHBR Open-Test-Case Fan ECL5/CATANA: Stability Limit
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Research of the past decades has shown that the operating range of modern fans and compressors is often limited by aeroelastic phenomena before the onset of pure aerodynamic instability. Prediction of these mechanisms is ...