Browsing by Author "van Rooijen, Bart"

Now showing 1 - 3 of 3
  • Thumbnail Image
    ItemOpen Access
    Coupled fan-intake dynamic distortion characterization at crosswind conditions
    (AIAA, 2025-02) Piovesan, Tommaso; Zachos, Pavlos K.; MacManus, David G.; Kempaiah, Kushal; Michaelis, Dirk; van Rooijen, Bart; Vahdati, Mehdi; Sheaf, Christopher
  • Thumbnail Image
    ItemOpen Access
    High-resolution turbofan intake flow characterization by automated stereoscopic-PIV in an industrial wind tunnel environment
    (IOP Publishing, 2023-11-30) Kempaiah, Kushal U.; Piovesan, Tommaso; Zachos, Pavlos K.; Michaelis, Dirk; Gebbink, Roy; van Rooijen, Bart; Prieto, Daniel Gil; MacManus, David; Sciacchitano, Andrea; Sheaf, Christopher
    Unsteady inlet flow distortion can influence the stability and performance of any propulsion system, in particular for more novel, short and slim intakes of future aero-engine configurations. As such, the requirement for measurement methods able to provide high spatial resolution data is important to aid the understanding of these flow fields. This work presents flow field characterisations at a crossflow plane within a short aeroengine intake using stereoscopic particle image velocimetry (SPIV). A series of tests were conducted across a range of crosswind and high angle of attack conditions for a representative short and slim aspirated intake configuration at two operating points in terms of mass flow rate. The velocity maps were measured at a crossflow plane within the intake at an axial position L/D = 0.058 from where a fan is expected to be installed. The diameter of the measurement plane was 250 mm, and the final spatial resolution of the velocity fields had a vector pitch of 1.5 mm which is at least two orders of magnitude richer than conventional pressure-based distortion measurements. The work demonstrates the ability to perform robust non-intrusive flow measurements within modern intake systems in an industrial wind tunnel environment across a wide range of operating conditions; hence, it is suggested that SPIV can potentially become part of standard industrial testing. The results provide rich datasets that can notably improve our understanding of unsteady distortions and influence the design of novel, closely coupled engine-intake systems.
  • Thumbnail Image
    ItemOpen Access
    Use of non-intrusive flow diagnostics for aero-engine inlet flow distortion measurements in an industrial wind-tunnel
    (AIAA, 2025-01-06) Piovesan, Tommaso; Zachos, Pavlos K.; MacManus, David; Michaelis, Dirk; van Rooijen, Bart; Sheaf, Christopher; Arzoglou, Dimitris
    In crosswind conditions, aero-engine intakes experience unsteady flow distortions at the fan face, typically caused by the ingestion of ground vortices and flow separation. These distortions can negatively impact both intake performance and the compatibility of the downstream propulsion system. Understanding the aerodynamics of these flows is crucial for developing next-generation aircrafts with propulsion systems integrated more closely with the airframe. Optical measurement techniques provide detailed datasets in both space and time to support this understanding, but several challenges limit their widespread use in propulsion integration testing. This study demonstrates a novel application of non-intrusive flow diagnostics in an industrial setting for propulsion integration testing. Optical measurements were conducted within an aspirated intake configuration and, later, within a fully coupled fan-intake propulsion system representative of a modern high-bypass aero-engine. Several innovative solutions were developed to improve the integration of optical systems into industrial settings and enhance data acquisition efficiency. The analysis of the results yielded significant contributions about the unsteady interactions within civil intakes at crosswind and high incidence conditions, which are expected to have a notable impact on the development of future, closely integrated propulsion systems architectures able to meet the specified NetZero targets.