Introducing UHURA Project

The project UHURA is focusing on the unsteady flow behavior around high-lift systems.

It will for the first time deliver a deeper understanding of critical flow features at new types of high-lift devices for transport aircraft during their deployment and retraction together with a validated numerical procedure for their simulation.


Krueger flaps are leading edge high-lift devices that enable laminar flow wing technology. From previous experiences, the suitability of the leading edge device is known for at least the steady flow of the fully deflected device.

Nevertheless the unsteady flow behaviour of such kind of device during deployment has not yet been investigated. UHURA aims to close this gap for the full deflection and retraction process.

UHURA is an EC-funded project in the framework of Horizon 2020. It is a follow-on of DeSiReH (2009-2013), where the type of leading edge device has been established, and the 7th Framework project AFLoNext (2015-2018), where it has been further matured.


UHURA aims to validate numeric simulation capabilities for the unsteady flow around high-lift systems during their deployment and retraction.

UHURA performs detailed experimental measurements in several wind tunnels to obtain a unique data set for validation purposes of Computational Fluid Dynamics (CFD) software, including detailed flow measurements by Particle Image Velocimetry (PIV) and other optical measurement technologies.

Advanced CFD methods promising significant improvements in the design lead time are validated against this database to obtain efficient and reliable prediction methods for the design phase.


The consortium of UHURA consists of 12 participants in total from eight European member states (Belgium, Czech Republic, France, Germany, Italy, Netherlands, Sweden, and Spain).

The project is coordinated by the DLR Institute of Aerodynamics and Flow Technology.


Author(s) Title Event / Journal
Wallin S, Hanifi A, Bagheri F Meshing and CFD strategies for large scale turboprop WT model integrating morphing high-lift devices 10th Aerospace Technology Congress, October 8-9, 2019, Stockholm, Sweden
Ponsin J Experiences of using LBM Xflow in the EU H2020 Project UHURA 3DExperience Conference Design, Modeling & Simulation, March 11-12, 2020, Barcelona, Spain
Wallin S, Iannelli P, Prachar A, Ponsin J Unsteady CFD Results for Deflecting High-Lift Systems 8th European Congress on Computational Methods in Applied Science and Engineering (ECCOMAS 2020), July, 19 – 24, 2020, Paris, France
Wild J, Schmidt M, Vervliet A, Tanguy G A 2D Validation Experiment for Dynamic High-Lift System Aerodynamics
The UHURA project is presenting its intermediate results at mid-term of the project at a special session within the EASN virtual Conference 2020 on September 2nd, 2020. Especially the progress on unsteady simulation capabilities for high-lift flows is outlined in six presentations:
Author(s) Title
J. Wild Unsteady High-Lift Aerodynamics – Unsteady RANS Validation
An Overview on the UHURA Project
H. Maseland, J. Wild, H. van der Ven Progress in Meshing for Dynamic High-Lift CFD
A. Prachar, R. Heinrich, A. Raichle, J.C. Kok, F. Moens, T. Renaud Progress towards numerical simulation of the dynamic Krueger motion with Chimera methods
S. Chen, F. Bagheri, P. Eliasson and S. Wallin Hybrid RANS-LES simulation of a deflecting Krüger device
F. Capizzano, T. Sucipto A dynamic Immersed Boundary method for moving bodies and FSI applications
J Ponsin, C. Lozano Progress towards simulation of Krueger devices motion with Lattice Boltzmann Methods


If you want to get in contact with the consortium, please feel free to use the form on this website.