CFD - Computational Fluid Dynamics, Motorsport, Formula 1

[Guest]

I made an MP4/20 rear wing last night. It may not be perfect (the airfoils are completely aribtrary shapes); does anybody want to run in in CFD?

I have now looked at your geometry which I got from SchumiGo, however I am afraid you would not prefer to do CFD on it.

Please understand that wings are all about proper aerofoil sections. The one you did on CAD I am afraid would be a so called a draggy wing! The sections will not work at all. There is no smooth and curved surfaces what so ever.

Please spend some time to refine your model so that we can get the most out of it.

As a starter I prefer you using one of the standard NACA sections.

Many Thanks

[schumiGO]

Ok mate) I gess ther is some clear point in you words...


So Does anybody know the most easer and clear way to input NACA profiles to Solid Works scearch.....

Instead of puting near 50 points in coordinate field and then use splien.

Thanks a lot.

[Guest]

Ok mate) I gess ther is some clear point in you words...


So Does anybody know the most easer and clear way to input NACA profiles to Solid Works scearch.....

Instead of puting near 50 points in coordinate field and then use splien.

Thanks a lot.

There are a lot of ways you can achieve this.

Paste the co-ordinate points in a notepad document and save it. Open the .txt document in Solidworks which will import all the points. Simply connect them by means of a spline and you are done!

Please let me know if you were able to do it.

Many Thanks

[schumiGO]

Ok mate) I gess ther is some clear point in you words...


So Does anybody know the most easer and clear way to input NACA profiles to Solid Works scearch.....

Instead of puting near 50 points in coordinate field and then use splien.

Thanks a lot.

There are a lot of ways you can achieve this.

Paste the co-ordinate points in a notepad document and save it. Open the .txt document in Solidworks which will import all the points. Simply connect them by means of a spline and you are done!

Please let me know if you were able to do it.

Many Thanks

Some good decision is possible if you use PROFILI 2.0 software.
Open profil in programe. Save like DFX. Open this file in SW and read it like sketch.

Best regards. SchumiGo!

[Guest]

Dont have access to PROFILI 2.0 mate, if its a freeware then please let me know from where to download it?

Did you manage to analyse the McLaren wing that guy sent you?

Thanks

[schumiGO]

Dont have access to PROFILI 2.0 mate, if its a freeware then please let me know from where to download it?

Did you manage to analyse the McLaren wing that guy sent you?

Thanks

Mate. Can you registered, or write me a letter. thanks a lot.

[Guest]

Dont have access to PROFILI 2.0 mate, if its a freeware then please let me know from where to download it?

Did you manage to analyse the McLaren wing that guy sent you?

Thanks

Mate. Can you registered, or write me a letter. thanks a lot.

There you go mate, good I have a user name now

[miqi23]

Dont have access to PROFILI 2.0 mate, if its a freeware then please let me know from where to download it?

Did you manage to analyse the McLaren wing that guy sent you?

Thanks

Mate. Can you registered, or write me a letter. thanks a lot.

There you go mate, good I have a user name now

Well almost, sorry forgot to login

[schumiGO]

Ok mate! Here you are!
So read PM message and after some time be ready to Flow some geometry that we will prepair.

Thanks a lot. best regards.

[PolyAero]

Howdy guys,
Recently a dozen or so Aero students, at my college, became involved in FSAE ( http://www.fsae.com for more info). We have created our car in Solidworks and are now attempting to get starting performing CFD and optimizing our cars sidepods, tunneling system, and wings. We have ran several tests on the wings on this site (including the three element wing supplied by StiK on page two of this thread) and now know the basics of FloWorks 2005. We have one substantial problem...we have no idea how to get the calculations that both StiK and other members have aquired. For example StiK supplied the following photograph: http://mega.ist.utl.pt/~lgsc/resultados.JPG which supplied the downforce, drag, etc. of the wing he used. My question is...how the hell do we get results like this using FloWorks. We have replicated his velocity/streamline plots, but since we are very new to FloWorks, we have no idea how to extract the data into a file for further analysis or if FloWorks will automatically perform these calculations. Thanks guys.

[miqi23]

The way FloWorks operate is that before you analyse any part for downforce or drag or any other paramter, you set goals for that parameter. And once your solution converges a results file is created for that goal which can be assessed through the tree on the left of your screen. Simply double click on it and you will get the results in a tabular form.

Thanks.

[PolyAero]

Awesome, got it to work. Thank you miqi.

[PolyAero]

Awesome, got it to work. Thank you miqi.

[AeroGT3]

Hey,

I'm new to the forum as well. I'm an Aerospace engineering junior at Cal Poly San luis obispo, and I'm the Aero lead for our Formula SAE team. This is the first year Aero is being done (I literally pulled a team together in the past 2-3 weeks) and I'm trying to find the best way to make use of CFD to cut down testing time. I've been learning Floworks, and it seems relatively user friendly, but I'm curious as to you guys' thoughts on how accurate and applicable it is/would be to wings and underbody elements of a formula style car at low speed and low reynolds numbers (Less than 1 million.)

I'm especially concerned with its ability to model the ground effects on the front wing and the underbody. How can the stationary ground be modeled with respect to the moving undertray? Any suggestions? I've heard it can be done in Fluent, but that it can be complex and quite difficult. While we have access to Fluent and Gambit, and the computing resources as well, we don't yet have the experience to use either. Also, I've run the 2 element model on page two of this thread, and I keep getting stall on the trailing edge of the first element, which generally agrees with what theory would suggest. Does anyone care to comment? I adjusted the minimum gap size and wall thickness to correspond with the features of the geometry, but had to modify the gap to be larger as gap thickness for the smaller spacing caused insane run times. I tried more advanced manual meshing/refinement, but the calculations were going to take longer than I would have the computer for. My results are shown below. Note the quality is poor as the original bmp was changed to a jpeg. Thanks in advance for any comments, inputs, or advice you may have.
[IMG:1071:726]http://i23.photobucket.com/albums/b397/ ... oodCFD.jpg[/img]

[West]

In engineering classes at UCI (probably elsewhere also) an assumption made in fluid analysis is to assume the object speed (in your case the car and ground) to zero while the fluid is moving at whatever speed you want.
I dunno how to set that up in Floworks since I haven't used it.

Try fitting a gurney flap and see what happens. You'll probably want to close the gap even if it takes extra computing time. I have Simon McBeath's Racecar Aerodynamics that gives a few relations on gap/flap/chord sizes, but can't find it right now.