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Dataset Open Access

SPLEEN - High Speed Turbine Cascade – Test Case Database

Lavagnoli, Sergio; Lopes, Gustavo; Simonassi, Loris; Torre, Antonino Federico Maria

This is an open-access database of experimental data of the flow in a high-speed low-pressure turbine cascade. The data have been collected at the von Karman Institute for Fluid Dynamics in the period 2018-2022 within the H2020 Clean Sky 2 project SPLEEN – Secondary and Leakage Flow Effects in High-Speed Low-Pressure Turbines, a project in collaboration with Safran Aircraft Engines.

This version contains documents that describe the experimental setup, instrumentation, measurement uncertainties, geometries, and database structure.

The database contains experimental data of the test campaign conducted on the linear cascade codenamed SPLEEN C1 in the VKI high-speed wind tunnel S1/C.

The turbine cascade geometry is representative of designs of high-speed low-pressure turbines for next-generation geared turbofan engines.

The measurement datasets describe the flow through the turbine cascade tested at on- and off-design conditions, with and without a wake generator located upstream of the cascade, and with and without endwall cavity injection/suction. The database includes measurements of pressure, temperature, flow angles, Mach numbers, pressure loss, unsteady blade and endwall pressure and quasi-shear-stress.

Version v1 of the database includes measurement datasets performed on the turbine cascade WITH FLAT ENDWALL (no cavity) WITHOUT WAKE GENERATOR (Steady inlet flow). Future versions will also include experimental data of the test case turbine equipped with a wake generator (unsteady inflow with wakes) and endwall cavity flow purge / suction. 

The project has received Funding from the Clean Sky 2 Joint Undertaking under the European Union's Horizon 2020 research and innovation program under the grant agreement 820883.

WARNING! The geometry of the SPLEEN C1 cascade contained in this version (v1) is not correct (wrong cascade stagger angle). Files affected by this error: SPLEENC1_Geometry_Airfoil_2D_CAD_v1.igs SPLEENC1_Geometry_Airfoil_2D_CAD_v1.stp SPLEENC1_Geometry_Airfoil_2D_CAD_v1.x_t The coordinates of the SPLEEN C1 geometry provided in the file SPLEENC1_Geometry_Airfoil_2D_v1.xlsx are instead correct. PLEASE USE version 2 of the SPLEEN C1 CAD files (SPLEENC1_Geometry_Airfoil_2D_CAD_v2) provided in the new versions of the database.
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