scholarly journals Finite Element Flow Simulations of the EUROLIFT DLR-F11 High Lift Configuration

2014 ◽  
Author(s):  
Kedar Chitale ◽  
Michel Rasquin ◽  
Jeffrey Martin ◽  
Kenneth Jansen
Keyword(s):  
Finite Element ◽  
High Lift ◽  
Flow Simulations

scholarly journals Aeroelastic behaviour of a wing with over-the-wing mounted UHBR engine

2020 ◽  
Vol 11 (4) ◽  
pp. 1045-1055 ◽  
Author(s):  
N. Neuert ◽  
D. Dinkler
Keyword(s):  
Three Dimensional ◽  
High Lift ◽  
Reduced Order ◽  
Aerodynamic Loads ◽  
Flow Simulations ◽  
Dimensional Effects ◽  
Line Theory ◽  
Lifting Line ◽  
Bypass Ratio ◽  
Lifting Line Theory

Abstract The aeroelastic behaviour of a wing with an over-the-wing pylon-mounted ultra-high bypass ratio engine and high-lift devices is studied with a reduced-order model. Wing, pylon and engine structures are reduced separately using the modal approach and described by their natural frequencies and modes. The characteristic aerodynamic loads are investigated with steady and unsteady flow simulations of a two-dimensional profile section. These results indicate possible heave instabilities at strongly negative angles of attack. Three-dimensional effects are taken into account using an adapted lifting line theory according to Prandtl. Due to high circulations resulting from the high-lift systems, the effective angles of attack are in the range of the potential instabilities. The substructures and aerodynamic loads are coupled in modal space. For the wing without three-dimensional effects, the bending instability occurs at the corresponding negative angles of attack. Even though there is potential for improvement, including the three-dimensional effects shifts the endagered area to possible operation points.

High-order temporal accuracy for 3D finite-element ALE flow simulations

2014 ◽  
Vol 100 ◽  
pp. 204-217 ◽  
Author(s):  
A. Hay ◽  
K.R. Yu ◽  
S. Etienne ◽  
A. Garon ◽  
D. Pelletier
Keyword(s):  
Finite Element ◽  
High Order ◽  
3D Finite Element ◽  
Flow Simulations
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