EU - TRAVIATA - Turbine Research for Aerodynamical Vane-frame Improvements in Advanced Two-spool Arrangements

Project: Research project

Description

In the aerodynamics of TVF (Turning Vane Frame) modules for future UHPE (Ultra-High Bypass-Ratio Engine) architectures the interaction with the HPT (high pressure turbine) and LPT (low pressure turbine) rotor is one of the major key factors for loss generation and has to be be accounted for already in the design process. The TVF inlet flow is driven by the HPT characteristics including wakes, secondary flow effects and tip leakage as well as purge flows. In order to provide relevant test data to guide the TVF aerodynamic design, it is critical that engine-relevant TVF inlet and exit flow conditions are provided.
Therefore the main objective of this project is to execute a rig test programme for TVF aerodynamic designs, coupled
with an upstream HPT stage and downstream LPT blade, in a flow environment representative of future geared civil
turbofan aero-engine applications. Since the performance of any HPT-LPT transition duct is impacted by the level of
the incoming flow effects, a variation of HPT tip gap and purge flow levels is planned. The aerodynamic performance
of the TVF is also affected by the downstream LPT rotor. This test programme aims to deliver both the HPT/TVF/LPT
system performance as well as the breakdown of the component performance levels.
The two-spool transonic test turbine facility at TU Graz equipped with a secondary air system will be used for
performing the investigations. Besides conventional measurement with rakes and pneumatic probes advanced
instrumentation such as fast response pressure probes and sensors as well as optical measurement techniques will be
used to study the time-resolved component interaction.
Two main test campaigns are planned. In the first test, a baseline TVF configuration is studied. In the second step an
optimized HPT+TVF+LPT setup will be investigated. The improvement can then be evaluated and demonstrated by
means of the available rig data. In this way it is guaranteed that a rise in technology readiness level from TRL4 to
TRL5 will be possible and that the input for a Ground Test Demo (TRL6) can be provided.
StatusActive
Effective start/end date1/04/1831/03/21