Use Cases

Wing with three-dimensional wing tip

A flow around three-dimensional wing tip is a relatively complex test case relevant for number of industrial ares like aeronautics, automotive or bio engineering. It allows to study number of physical phenomena responsible for e.g. generation of the drag on the airplane, which increases fuel consumption in aviation. Despite its environmental and economical importance, there is lack of high-fidelity numerical data for high-Reynolds-number turbulent flows. This case is as well a good platform for testing number of different aspects of numerical modeling including mesh adaptivity, uncertainty quantification or data reduction. We aim for simulation of flow around NACA0012 wing tip and validation against existing literature data.

Application Area Aerospace
Used Code Nek5000
Contributing Partner  KTH

High fidelity simulation of rotating parts

Thanks to this use case, Nek5000 will be improved in the simulation of rotating parts, which would enable research in the direction of detailed flow field and aeroacoustics analyses of helicopters. We will start from the well known HART-II benchmark, improving NEK5000 behavior at benchmark conditions (relatively high Mach numbers). The results will be validated comparing with experimental data and specialized codes (ROSITA, etc). The final step will be the application to a rotor geometry provided by an industrial partner.

Application Area Aerospace
Used Code Nek5000
Contributing Partner  CINECA

Emission prediction of internal combustion (IC) and gas turbine (GT) engines

This use-case is dedicated to the modelling of pollutants in practical combustion systems using advance numerical simulations. It includes the solution of the chemistry problem with all the species and reactions along with its interaction with the turbulence. This use-case addresses the prediction of key chemical reactions and species that are responsible for the final formation of pollutants of interest for fuels of industrial interest.

Application Area Automotive and Aerospace
Used Code Alya
Contributing Partner BSC

Active flow control of aircraft aerodynamics including synthetic jet actuators

It addresses the numerical characterization of synthetic jet actuators on a full aircraft configuration to better control flow separation over the wings at low drag penalty. At moderate to high Reynolds number conditions as those found in landing or take off, the resolution of the boundary layer is prohibitive with the resources available at current supercomputer architectures. By the use of advance simulation techniques as wall-model large-eddy simulation (WMLES), this is now feasible at these conditions and research dedicated to this problem is showing high potential to achieve optimal aerodynamic performance.

Application Area Aerospace
Used Code Alya
Contributing Partner BSC

Coupled simulation of fluid and structure mechanics for fatigue and fracture

Advanced methodologies and technologies for maintenance and structural health monitoring (SHM) are required for the safety of civil aircrafts. Impacts from external objects on the fuselage structure may provoke a local damage of the material. In this case study, the use of SHM technology based on piezoelectric sensors is applied for damage detection and localisation. Experimental results are correlated against numerical predictions. The use of these new technologies leads to reduction of maintenance costs during service.

Application Area Aerospace
Used Code Alya
Contributing Partner BSC

Combustion instabilities and emission prediction

The simulation and prediction of combustion instabilities and accurate emissions is a major requirement towards digital twin design in aerospace and energy technology. The aim is to speed up complex geometry simulations of a real gas turbine representative of energy and aircraft propulsion technologies using innovative high performance computing. This required adapting the simulation framework to new architectures and parallel methods which would render the application ready for exascale leadership systems.

Application Area Aerospace and Energy
Used Code AVBP
Contributing Partner

Explosion in confined spaces

Current methods in safety certification are severely lacking and date back decades.  The goal is to provide an accurate and fast method to simulate extreme scenarios of explosions where experiments are highly unpractical. These scenarios are highly dynamic and involve hugely different geometrical scales from 0.1mm for the flame front to meters for the encased domain. To render these simulations practical highly efficient dynamic mesh adaptation methods are required. Here we use a previously performed statically resolved large eddy simulation of an explosion in a confined space and we aim to gain a factor 10 in time to solution using dynamic mesh refinement in a massively parallel framework.

Application Area Safety applications
Used Code AVBP
Contributing Partner

Tidal Energy Generation Modelling of drag and sedimentation effects of tidal turbines

The use case concerns modelling the tidal flow in a coastal environment with emphasis on how this can be used to optimise energy generation from tidal turbines. The simulation also allows us to understand the effects the turbines have the movement and deposition of sediment in the marine environment.

Application Area Renewables
Used Code Fluidity
Contributing Partner

Adjoint optimization in external aerodynamics shape optimization

One of the fastest growing fields in CFD research is adjoint optimization. It is based on the Adjoint method, which allows for very efficient calculation of sensitivities of the objective function with respect to design variables. This makes adjoint methods ideal for optimizing problems with large numbers of variables and/or large design spaces. FEniCS, thanks to his extremely ease of use and flexibility and to his python-based interface is a powerful tool to implement, test and interact with implementation of an adjoint CFD solver based on the Unicorn solver. This will be tested on the external aerodynamics of the DrivAer sedan model, one of the most advanced automotive benchmarking geometry .

Application Area Automotive and Aerospace
Used Code FEniCS
Contributing Partner

Design process and simulation of full equipped aero planes

The accurate simulation based prediction of external aerodynamics is a key technology for the design of aircrafts. The aerodynamic data production for specified configurations, power settings and speeds allows the prediction of the overall aircraft performance. (Configuration refers to the number of power units operating, whether flaps, landing gear or speed brakes are extended, etc.).

Application Area Aerospace
Used Code FLUCS
Contributing Partner

CFD coupling with computational structural mechanics including elastic effects

Including elastic effects (e.g. wing bending) and varying actual aircraft mass throughout the take-off, initial climb, cruise, approach and landing in aerodynamic data production requires CFD coupling with computational structural mechanics. Such multi-disciplinary simulations are used routinely today for improved aircraft performance prediction.

Application Area Aerospace
Used Code FLUCS
Contributing Partner