Numerical Simulation of a Fully Integrated Engine Ground Test

In the frame of the DLR project SAMURAI, the German Aerospace Center performed an engine ground test with an installed IAE V2527, which was accompanied by various CFD studies. One of these studies aimed at simulating the experimental set-up, including aircraft, ground and hangar with a RANS approach. Therefore, the two equation eddy viscosity model Menter SST and the Reynolds stress model SSG/LRR-g were utilized. The scope of this paper is to illustrate the numerical approach and results of this simulation. Numerical results from the jet flow were compared with measured data obtained using both a Particle Image Velocimetry and Backward Oriented Schlieren method. Regarding the velocity distributions within the outer jet shear layer, the comparison with particle image velocimetry data showed good agreement especially for the Menter SST turbulence model. However, the turbulent kinetic energy was generally overpredicted in the CFD results

Static and dynamic numerical simulations of a generic UCAV configuration with and without control devices

A contribution for the assessment of the static and dynamic aerodynamic behavior of a generic UCAV configuration with control devices using CFD methods is given. For the CFD simulations the unstructured grid based DLR TAU-Code and the structured grid based NLR solver ENSOLV are used. The numerical methods are verified by experimental wind tunnel data. The current investigations should provide a contribution to assess the prediction capability of control device effectiveness using CFD methods. The presented computational results for the assessment will be validated by dedicated experimental data. Furthermore, it should support the understanding of the flow physics around the trailing edge control devices of highly swept configurations with a vortex dominated flow field. Design requirements should be able draw by analyzing the interaction between the vortical flow and the control devices. The present work is part of the NATO STO/AVT Task Group AVT-201 on Stability and Control prediction method

Overset LES of a solid and porous NACA0012 trailing edge

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