GKN Aerospace talks about why they choose OMNIS™/AutoGrid for their structured meshing

    Antoine Remiot     Customer Case     18.05.2016

Business Challenges

"As a key player in the aerospace market, at GKN Aerospace we need to be very demanding regarding the capabilities of the tools we use. In the fast-paced environment that is the CFD world, our engineers need a robust and quick mesh generator, providing an accurate capturing of our complex turbomachinery geometries." 

Improvement

"Since we acquired OMNIS™/AutoGridwe divided our meshing time by 5, allowing us to spend more time on the post-processing and the solving of our real challenges." 

says Martin Olausson, GKN Aerospace Engine Systems in Sweden

"My colleagues using NUMECA direct competitor's meshing tool, can't keep the pace with us! In fact, they are getting more and more interested by NUMECA's tools, so we’ve organized an internal OMNIS™/AutoGrid training for them, so we can take advantage of OMNIS™/AutoGrid’s advantages for an even larger set of our applications."

Typical turbomachinery geometry meshed by GKN Aerospace. In yellow the passages that are really meshed. Below the quality and the mesh generation time for each part.

"With OMNIS™/AutoGrid, it is only a matter of a few hours to come up with a high quality periodic matching mesh around multiple blade rows, starting from scratch. The row-wizard setting up automatically a different topology for each type of machine configuration (axial compressor, axial turbine, centrifugal impeller, etc.) provides us a huge gain of time."

"We are investigating a lot of advanced features, such as cavities using the ZR effects, fillets on the hub, snubber with fillets, partial tip gaps, etc., so the possibility to include them automatically and easily in the final mesh allows us to capture more accurately the topology of the flow. Globally speaking, this tool saves us time and increases the accuracy of our CFD simulations."

Fillets can be imported from a CAD model, or directly created within the interface of OMNIS™/AutoGrid. In GKN’s case, they are created within AG5.

 

Non-axisymmetric and partial tip gaps (in black) can be created on the hub and on the shroud of a blade.

 

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Posted by Antoine Remiot

Antoine is a Technical Sales Engineer, dedicated to the Turbomachinery market. He has been working at NUMECA HQ since 2014, starting on a customer support position, and then moving to his current Technical Sales position. Passionately fond of Aeronautics, Antoine holds a degree in Mechanical Engineering from the Faculté Polytechnique de Mons, Belgium.