[MVRC] Mantium Virtual Racecar Challenge 2017

Post here information about your own engineering projects, including but not limited to building your own car or designing a virtual car through CAD.
Alonso Fan
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by Alonso Fan » Sat Aug 12, 2017 11:01 am

thanks LVDH, the new version works a treat. All the pp works too

however, i'd like a little help please. i'm introducing a new double layer front wing somewhat akin to TF's and I don't understand how to make it work. I get a high pressure region filling all the vertical space between the elements and low pressure on top of the upmost wing and on the bottom of the lowest wing. They're not working as two individual wings even though one is at the top of the allowable volume and the other is at the bottom. they have plenty of space between them vertically. i'm so baffled. last year with occfd and wflow I had no such issues. as a result i'm getting cl(f) as positive...
MVRC - SHM Racing

CAEdevice
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by CAEdevice » Sat Aug 12, 2017 12:46 pm

Alonso Fan wrote:
Sat Aug 12, 2017 11:01 am
thanks LVDH, the new version works a treat. All the pp works too

however, i'd like a little help please. i'm introducing a new double layer front wing somewhat akin to TF's and I don't understand how to make it work. I get a high pressure region filling all the vertical space between the elements and low pressure on top of the upmost wing and on the bottom of the lowest wing. They're not working as two individual wings even though one is at the top of the allowable volume and the other is at the bottom. they have plenty of space between them vertically. i'm so baffled. last year with occfd and wflow I had no such issues. as a result i'm getting cl(f) as positive...
I suggest you two ways to improve: run a race with the intro class model designed with CAESES, studying how it works, or to share your post processing and geometry and ask for advices.

Alonso Fan
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Joined: Sat Apr 06, 2013 5:21 pm
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by Alonso Fan » Sat Aug 12, 2017 4:09 pm

Question for Chris:

This might sound cheeky and hopefully it won't come to this lbut is there anything stopping me from downloading the intro class geometry, modifying it and altering it and submitting it as a full entry? :mrgreen:
MVRC - SHM Racing

rjsa
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by rjsa » Sat Aug 12, 2017 4:54 pm

You'll have to make sure it meets the rules, but other than that can't see why not.

And IMO, a good way to get started.

RicME85
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by RicME85 » Sat Aug 12, 2017 9:31 pm

Already asked that, yes you can, once you modify anything outside of what is stated in the intro rules then it automatically becomes a full class entrant.

cdsavage
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by cdsavage » Sat Aug 12, 2017 10:32 pm

Alonso Fan wrote:
Sat Aug 12, 2017 4:09 pm
Question for Chris:

This might sound cheeky and hopefully it won't come to this lbut is there anything stopping me from downloading the intro class geometry, modifying it and altering it and submitting it as a full entry? :mrgreen:
Yep, not a problem as long as it complies with the full rulebook.

etsmc
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Joined: Wed Apr 04, 2012 12:20 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by etsmc » Mon Aug 14, 2017 12:49 am

anyone else notice that the submission date in the latest email says 23.07.2017 should it be 20.08.2017? as that is listed on the website?

CAEdevice
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by CAEdevice » Mon Aug 14, 2017 7:58 am

Hi, after the last MLow update, I get this "oscillating" pressure integral on the engine inlet.

Image

rjsa
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by rjsa » Mon Aug 14, 2017 12:30 pm

I get this too.

Alonso Fan
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by Alonso Fan » Mon Aug 14, 2017 2:41 pm

how far along the car are cl(r) and cl(f) measured?
MVRC - SHM Racing

rjsa
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by rjsa » Mon Aug 14, 2017 2:55 pm

Wheel center

Alonso Fan
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by Alonso Fan » Mon Aug 14, 2017 3:36 pm

So they are exact values at a point rather than general values?
MVRC - SHM Racing

rjsa
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Joined: Fri Mar 02, 2007 2:01 am

Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by rjsa » Mon Aug 14, 2017 3:51 pm

Times 1/2*rho*v2 will give the force on each axle.

AratzH
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by AratzH » Mon Aug 14, 2017 9:04 pm

I must be very lucky. After figuring out why my simulations wouldn'g go past the blockMesh step (it had to do with the MPI implementation I had) I get very stable intake figures... Also noticeable less downforce and drag :shock:

Image
MVRC -> TF

etsmc
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Re: [MVRC] Mantium Virtual Racecar Challenge 2017

Post by etsmc » Wed Aug 16, 2017 3:37 am

Well, I think I will be submitting today as I can't seem to make any improvements to the car. Really struggling with making downforce and still keeping the flow to the HX.
And unless I can get a laptop setup with MantiumFlow on it then there will not be much development on the car for the race after either.

Goodluck for the next race I hope other's have been able to make more improvements than I, looking forward to the renders so I can see what other are doing.



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