INFLUENCE OF A TURBULENCE CONTROL SCREEN ON THE AERODYNAMIC AND AEROELASTIC BEHAVIOR OF A UHBR FAN - Archive ouverte HAL Access content directly
Preprints, Working Papers, ... Year : 2022

INFLUENCE OF A TURBULENCE CONTROL SCREEN ON THE AERODYNAMIC AND AEROELASTIC BEHAVIOR OF A UHBR FAN

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. For these experiments, a turbulence control screen (TCS), a hemisphere, consisting of honeycomb and wiremesh panels, was installed in front of the rig in order to ensure homogeneous, disturbance-free inflow conditions. This kind of screen was developed in the early 1970 years to investigate flight-noise on static test beds. Today, they are commonly used in aero-engine and fan tests, because they improve the accuracy of acoustic measurements and provide more reproducible performance tests. However, the influence of such screens has been investigated only from an acoustic point of view in the past. This study presents a back-to-back comparison of measurements with and without the TCS, which allows a characterization of the effects on aerodynamic and aeroelastic behavior of the fan stage. The investigation was carried out for multiple stable operating points on two different speed lines to obtain a global image of the influence at part and design speed. The utilization of steady and unsteady instrumentation in different axial and circumferential duct positions allows a detailed analysis of similarities and differences of the configuration without and with the TCS and provides insight into underlying physical mechanisms.
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Dates and versions

hal-03658850 , version 1 (04-05-2022)

Identifiers

  • HAL Id : hal-03658850 , version 1

Cite

Alexandra Schneider, Benoît Paoletti, Xavier Ottavy, Christoph Brandstetter. INFLUENCE OF A TURBULENCE CONTROL SCREEN ON THE AERODYNAMIC AND AEROELASTIC BEHAVIOR OF A UHBR FAN. 2022. ⟨hal-03658850⟩
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