PANDORA Open Fan Open Test Case

Overview This dataset provides a full-scale open-fan geometry for the use within aerodynamic benchmarking and numerical method validation activities. The dataset was developed within the Horizon Europe research project PANDORA Project – OPEN FAN VALIDATION FOR CARBON-FREE AIRCRAFTS by DLR's Institute of Propulsion Technology and is intended to support open scientific research in civil aerospace turbomachinery aerodynamics. Dataset Content The release includes: Simplified 3D surface geometry of an open fan configuration (STEP/IGES format) CFD-ready surface definitions suitable for meshing and numerical simulation Reference operating conditions for benchmark cases Validation datasets for aerodynamic performance assessment Supporting documentation for numerical setup and post-processing Geometry Definition The provided geometry represents a simplified analysis model derived for CFD purposes. It does not include: Manufacturing tolerances Material specifications Internal structural components Assembly or integration definitions Native CAD feature trees or parametric design history Operational Data and Specification Table 1: Top level specification Maximum Cruise MXCR Take-Off TKOF Thrust (N) 18000 92500 Altitude (m) 10668 0 Flight Mach (-) 0.78 0.25 V0 (m/s) 231.2 87.3 P0 (Pa) 23842 101325 ΔTISA (K) 0 +15 Table 2: Geometric data Rotor Vane Diameter (m) 3.96 3.96 Blade number 12 8 Table 3 Operational and CFD-based performance data MXCR TKOF RPM (1/m) 982 1228 Delta pitch rotor (deg) 0.0 19.7 Delta pitch stator (deg) 0.0 -10.2 Power Coefficient cp (-) 3.34 1.40 Thrust Coefficient ct (-) 0.77 0.78 Advance Ratio J (-) 3.75 1.08 Open Fan Thrust (N) 19412 93198 Apparent or Pseudo Efficiency (%) 82.75 60.44 Effective or Overall Efficiency (%) 70.83 58.49 Intended Use The dataset is intended exclusively for: Academic CFD research Turbomachinery aerodynamic benchmarking Validation of numerical simulation methods (RANS/LES/URANS) Open science and reproducibility studies The dataset is not intended for manufacturing, certification, operational use, or industrial production. Export Control and Legal Notice This dataset has been reviewed in accordance with institutional procedures and applicable National and European Union export control regulations. The released data does not contain controlled technical information enabling reproduction or manufacturing of a functional propulsion system. It is limited to simplified aerodynamic surface representations intended for scientific analysis. Any use of the dataset is restricted to non-commercial scientific research purposes only. Intellectual Property The intellectual property rights of the dataset are owned by DLR's Institute of Propulsion Technology. The design was developped in the framework of the PANDORA project. Funding This work has received funding from the European Union’s Horizon Europe research and innovation programme under Grant agreement ID: 101096156 doi 10.3030/101096156 Licensing A license needs to be accepted by anyone using the geometry prior to downloading the files. All files, including the agreement, will be provided upon request. Please get in touch with any of the contact persons to received a dowload link.