Technology Transfer

A Chimera Overlapping Mesh CFD Technique for Complex Applications

Applications

Chimera multigrid parallel computation for steady viscous flow around high lift transport aircraft configuration
 

Chimera computation for unsteady viscous interaction between main rotor and fuselage. Helicopter in forward flight.
 

Steady viscous calculation of turbomachinery
rotor with a groove at the blade tip.

 > Aircraft, Helicopter, Turbomachinery

• High-lift aircraft configurations.
• Propellers.
• Accurate turbomachinery design .

Keywords

• CFD, Structured mesh, Chimera, URANS&RANS equations, High-lift, Aircraft, Propeller, Turbomachinery

Advantages

• Simplified meshing of complex geometries.
• No re-meshing for relative body motions.
• Addition of body elements ( flaps, spoilers) and icing accretion effects.
• Accurate CFD modeling around technological details in turbomachines (gaps, grooves at the blade tip, holes and slots).
• Multi-block structured approach.
• Automatic mesh adaptation, high order numerical schemes.

Description

• Overlapping structured meshes.
• Steady and unsteady viscous flow simulation, turbulence modeling.
• Deforming meshes, multi-grid acceleration technique, parallel mode.
• Implementation in Onera's elsA CFD software.

Expertise

• Theoretical and Applied CFD.

Customers

• Airbus, Eurocopter, Snecma, Turbomeca.

Last Update: 3 October 2006 - © ONERA 2009 - Terms of use