|July 6, 2013, 21:46||
Floefd for external aerodynamics?
Mike von Bertouch
Join Date: Jul 2013
Posts: 1Rep Power: 0
I recently trialled FloEFD for use in modelling modifications to aircraft but struck a fundamental problem right from the first benchmark test. I have used naca windtunnel reports in the past to validate cfd modelling approaches/tools before committing to a project or product.
The first test for FloEFD was a NACA23012 2D model and despite fine tuning the mesh size and accuracy I couldn't get even close to the real world data - Clmax being well short of the test data and the Cl vs. alpha data also nowhere near reality. The moment coefficient data was very close in all cases tried for what it was worth though.
The feedback from mentor graphics was a little contradictory in that with sufficient mesh density the results should match reality but also that the boundary layer modelling wasn't ideal for external flows.
When a reference 3d wing was tried we achieved similar results.
A 2d supersonic inlet did work well (actually our next project) and I do love the tight integration with proe.
But if I have no confidence in the results...
Does anyone use this product for external flows and have validated their modelling with windtunnel or flight test data?
Last edited by Mikevb; July 9, 2013 at 02:33.
|July 15, 2013, 11:35||
Join Date: Jul 2009
Posts: 230Rep Power: 10
Can you write me a private message with whom you spoke from Mentor Graphics?
I work for MG and can check internally on your Problem and find out more.
Was it really someone from Mentor Graphics or from our reseller?
|benchmarking, floefd, testing, validation|
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