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> Cool 914 Flow Simulation, What's the air look like around a 914 at 100mph?
Joemo5
post Jul 12 2019, 04:53 PM
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I snuck some time in after work today to toss in a 3D model of a 914 into Solidworks flow simulation. Shhh... don't tell the boss!

I found the model on Grabcad from Eric O. If he's here.. Thanks! I figured you guys would love to see this so here's a plot of the velocity streamlines. The lines show the flow path, and the color shows how fast the air is going.

Attached Image

Better yet, here's an video showing the flow in 3D. If you've got the band width, watch in HD 1080p

URL Link: https://youtu.be/-1dZOuYtUiU


https://www.youtube.com/watch?v=-1dZOuYtUiU


In order to finish the simulation without running overnight, I had to limit how fine the mesh was which means that the simulation is not 100% accurate. The model is pretty basic too and not completely accurate. If by chance anyone has a more accurate model, I'd love to rerun the simulation with a finer mesh and better model. (IMG:style_emoticons/default/idea.gif)
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mepstein
post Jul 12 2019, 05:05 PM
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That’s really cool. Thanks for sharing.
(IMG:style_emoticons/default/beerchug.gif)
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wes
post Jul 12 2019, 05:17 PM
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Excellent (IMG:style_emoticons/default/beerchug.gif) thanks!
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BPic
post Jul 12 2019, 05:21 PM
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Very cool. Thank you for sharing this. (IMG:style_emoticons/default/beerchug.gif)
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sb914
post Jul 12 2019, 05:25 PM
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Post of the month! :Qarl:edit : of the year ! Thanks
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IronHillRestorations
post Jul 12 2019, 05:34 PM
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I remember reading in an old Panorama that said the 914 with the lights down had the best CD of any production Porsche up until the 924 (I think). I'll have to see if I can find that article.
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Joemo5
post Jul 12 2019, 05:58 PM
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Thanks guys. I looked up the Cd value once and remember thinking it was low. @IronHillRestorations I'd like to read the article especially if its got any real world values for comparisons
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IronHillRestorations
post Jul 12 2019, 06:01 PM
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Can you add the flaps at the bottom of the firewall?
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JeffBowlsby
post Jul 12 2019, 06:30 PM
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Mo Aero stuff:


Attached File(s)
Attached File  zTN_GEN_AerodynamicAids.pdf ( 276.51k ) Number of downloads: 267
Attached File  zTN_GEN_AerodynamicAids1.pdf ( 1.4mb ) Number of downloads: 86
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Joemo5
post Jul 12 2019, 07:19 PM
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@JeffBowlsby Sweet documents. Thanks!

@IronHillRestorations Sure. If I get some more free time I'll add them in. I don't know what they look like though. My car came partially disassembled. Got any pics?
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wndsrfr
post Jul 12 2019, 07:34 PM
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Any way to add a front spoiler and rear spoiler to the model? Sure would be neat to see how the flow is on Kermee at 100-140mph....
Here's a few pics...Oh, and ground clearance at front is 4 inches....

Attached Image Attached Image
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Andyrew
post Jul 12 2019, 08:13 PM
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Thanks for sharing!!
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Andyrew
post Jul 12 2019, 08:14 PM
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Can you show it at 180mph? Curious to what happens at the rear end.
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914-300Hemi
post Jul 12 2019, 11:00 PM
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Thanks for sharing. Great video. Would interesting to see where the heat escapes.
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Mikey914
post Jul 13 2019, 12:55 AM
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QUOTE(IronHillRestorations @ Jul 12 2019, 05:01 PM) *

Can you add the flaps at the bottom of the firewall?

These
https://900designs-container.zoeysite.com/f...air-deflector-1

The only problem is that your model will treat the engine area as a flat surface, not a cavity.


Attached thumbnail(s)
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76-914
post Jul 13 2019, 08:03 AM
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QUOTE(Andyrew @ Jul 12 2019, 07:14 PM) *

Can you show it at 180mph? Curious to what happens at the rear end.

(IMG:style_emoticons/default/agree.gif) And at 130mph.
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Tdskip
post Jul 13 2019, 08:28 AM
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Thanks for posting this-super cool
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johnhora
post Jul 13 2019, 09:26 AM
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Thanks for taking the time to run this...very cool and interesting info.
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jd74914
post Jul 13 2019, 09:58 AM
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QUOTE(Joemo5 @ Jul 12 2019, 08:19 PM) *

@IronHillRestorations Sure. If I get some more free time I'll add them in. I don't know what they look like though. My car came partially disassembled. Got any pics?

More important than flaps are likely spinning wheels to be honest. Lots change when wheels move and the ground moves in my experience. (IMG:style_emoticons/default/smile.gif)

SW started using a version of Mentor FloEFD-does it let you set turbulence models and all of that fun stuff? It used to be limited to a heavily damped k-e model to solve fast.

Neat stuff!
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Superhawk996
post Jul 13 2019, 12:22 PM
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Nice job with the CFD work. (IMG:style_emoticons/default/beerchug.gif)

Looks like you'll have a new full time job as the 914 aero guy!

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