[MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

Post here information about your own engineering projects, including but not limited to building your own car or designing a virtual car through CAD.
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LVDH
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Joined: Tue Mar 31, 2015 1:23 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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Ft5fTL wrote:
Thu Nov 28, 2019 4:09 pm
LVDH wrote:
Thu Nov 28, 2019 3:17 pm
So here are the results of this process:
https://mantiumchallenge.com/scrutineer ... rina-2019/
Like I wrote, congratulations to Pure Power =D> =D> =D> . I think he needs to employ some regulations guy next year.
Well at least i'm first on that one :D The thing is, Fusion 360 doesn't open the templates as where should it be and i have no clue how to fix it.
Oh, I see. You should have asked on the forum, we would probably have found a solution. Now its over, but you should get this sorted out for next year, as your cars always look very well designed.

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

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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Dear lord I fixed that.

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LVDH
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Joined: Tue Mar 31, 2015 1:23 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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If we made a mistake, you can protest it. I just checked, it would only bump you up one position though.

JJR
JJR
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Joined: Fri Jul 12, 2013 7:02 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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Hi !

I promised last week to do some CFD simulation of early 90 ´s F1 cars. I use Ferrari F1 from 1993 as basic.

Some key features on aero in early 90 ´s:

1.Flat bottom up to rear wheels where rear diffuser start
2.Exhaust blown diffuser
3.Simple splitter ( first car to have it was Tyrrell 019 from 1990 )
4.Front wing endplate extensions ( Adrian Newey inovation from 1991 on Williams FW14 )
5.Multi element rear wing ( my cars has 6 elements )

- I believe I used front and rear wing foil from Leyton House (year 1990 - 1992)
- diffuser is linear (not complex 3D shape )
- car has cooler and engine bay flow ( 3,5 L V12 engine )

https://drive.google.com/file/d/1fQbYrF ... sp=sharing
https://drive.google.com/file/d/1LUCr9a ... sp=sharing
https://drive.google.com/file/d/1qI9vx0 ... sp=sharing
https://drive.google.com/file/d/1N4GKqV ... sp=sharing

Results:

CDA = 1,354
CLA= -2,525
L/D= 1,865
CLA front= 35,9%
Coolers flow= 1,2 m3/sec

This is after 1,5 week of development. There is big potencial to improve . Maybe I will continue to explore aero potencial of those cars. I think it can be easly improved to CLA about 3,5 and more .
Last edited by JJR on Fri Nov 29, 2019 3:58 pm, edited 3 times in total.

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CAEdevice
40
Joined: Thu Jan 09, 2014 2:33 pm
Location: Erba, Italy

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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JJR wrote:
Fri Nov 29, 2019 2:18 pm
Hi !

I promised last week to do some CFD simulation of early 90 ´s F1 cars. I use Ferrari F1 from 1993 as basic.

Some key features on aero in early 90 ´s:

1.Flat bottom up to rear wheels where rear diffuser start
2.Exhaust blown diffuser
3.Simple splitter ( first car to have it was Tyrrell 19 from 1990 )
4.Front wing endplate extensions ( Adrian Newey inovation from 1991 on Williams FW14 )
5.Multi element rear wing ( my cars has 6 elements )

- I believe I used front and rear wing foil from Leyton House (year 1990 - 1992)
- diffuser is linear (not compex 3D shape )
- car has cooler and engine bay flow ( 3,5 L V12 engine )

https://drive.google.com/file/d/1fQbYrF ... sp=sharing
https://drive.google.com/file/d/1LUCr9a ... sp=sharing
https://drive.google.com/file/d/1qI9vx0 ... sp=sharing
https://drive.google.com/file/d/1N4GKqV ... sp=sharing

Results:

CLA = 1,354
CDA= -2,525
L/D= 1,865
CLA front= 35,9%
Coolers flow= 1,2 m3/sec

This is after 1,5 week of development. There is big potencial to improve . Maybe I will continue to explore aero potencial of those cars. I think it can be easly improved to CLA about 3,5 and more .
Thank you JJR! Very interesting work. I guess you are simulatin a high downforce setup.

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jjn9128
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Joined: Tue May 02, 2017 10:53 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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JJR wrote:
Fri Nov 29, 2019 2:18 pm
Hi !

I promised last week to do some CFD simulation of early 90 ´s F1 cars. I use Ferrari F1 from 1993 as basic.

Some key features on aero in early 90 ´s:

1.Flat bottom up to rear wheels where rear diffuser start
2.Exhaust blown diffuser
3.Simple splitter ( first car to have it was Tyrrell 19 from 1990 )
4.Front wing endplate extensions ( Adrian Newey inovation from 1991 on Williams FW14 )
5.Multi element rear wing ( my cars has 6 elements )

- I believe I used front and rear wing foil from Leyton House (year 1990 - 1992)
- diffuser is linear (not compex 3D shape )
- car has cooler and engine bay flow ( 3,5 L V12 engine )

https://drive.google.com/file/d/1fQbYrF ... sp=sharing
https://drive.google.com/file/d/1LUCr9a ... sp=sharing
https://drive.google.com/file/d/1qI9vx0 ... sp=sharing
https://drive.google.com/file/d/1N4GKqV ... sp=sharing

Results:

CDA = 1,354
CLA= -2,525
L/D= 1,865
CLA front= 35,9%
Coolers flow= 1,2 m3/sec

This is after 1,5 week of development. There is big potencial to improve . Maybe I will continue to explore aero potencial of those cars. I think it can be easly improved to CLA about 3,5 and more .
1990's Tyrrell had a peak CzS over 4.5 with minimum ~3.9 with all the rule changes. CxS was 1.3 to 1.7, again depending on years and rules, from Gascoyne and Agathangelou for a Barcelona type medium DF circuit.

EDIT: Not meant as criticism just as a point of reference!
#aerogandalf
"There is one big friend. It is downforce. And once you have this it’s a big mate and it’s helping a lot." Robert Kubica

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LVDH
30
Joined: Tue Mar 31, 2015 1:23 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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JJR wrote:
Fri Nov 29, 2019 2:18 pm
Hi !

I promised last week to do some CFD simulation of early 90 ´s F1 cars. I use Ferrari F1 from 1993 as basic.

Some key features on aero in early 90 ´s:

1.Flat bottom up to rear wheels where rear diffuser start
2.Exhaust blown diffuser
3.Simple splitter ( first car to have it was Tyrrell 019 from 1990 )
4.Front wing endplate extensions ( Adrian Newey inovation from 1991 on Williams FW14 )
5.Multi element rear wing ( my cars has 6 elements )

- I believe I used front and rear wing foil from Leyton House (year 1990 - 1992)
- diffuser is linear (not complex 3D shape )
- car has cooler and engine bay flow ( 3,5 L V12 engine )

https://drive.google.com/file/d/1fQbYrF ... sp=sharing
https://drive.google.com/file/d/1LUCr9a ... sp=sharing
https://drive.google.com/file/d/1qI9vx0 ... sp=sharing
https://drive.google.com/file/d/1N4GKqV ... sp=sharing

Results:

CDA = 1,354
CLA= -2,525
L/D= 1,865
CLA front= 35,9%
Coolers flow= 1,2 m3/sec

This is after 1,5 week of development. There is big potencial to improve . Maybe I will continue to explore aero potencial of those cars. I think it can be easly improved to CLA about 3,5 and more .
This is cool. It is interesting to see that there is such low pressure at the diffuser but not at the leading edge of the floor. Maybe you could create some streamlines to show from where the diffuser gets fed with air.
Also how accurately did you model the car? Did you use real dimensions or just eyeballed it?

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

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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LVDH wrote:
Fri Nov 29, 2019 10:40 am
If we made a mistake, you can protest it. I just checked, it would only bump you up one position though.
Oh no, I’m sure I brought the bad part back along the way.

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LVDH
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Joined: Tue Mar 31, 2015 1:23 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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rjsa wrote:
Fri Nov 29, 2019 6:26 pm
LVDH wrote:
Fri Nov 29, 2019 10:40 am
If we made a mistake, you can protest it. I just checked, it would only bump you up one position though.
Oh no, I’m sure I brought the bad part back along the way.
Sounds like Pure Power needs a new guy for the CAD department and you have to talk with your shipping people...

JJR
JJR
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Joined: Fri Jul 12, 2013 7:02 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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[/quote]
This is cool. It is interesting to see that there is such low pressure at the diffuser but not at the leading edge of the floor. Maybe you could create some streamlines to show from where the diffuser gets fed with air.
Also how accurately did you model the car? Did you use real dimensions or just eyeballed it?
[/quote]

Maim aero devices are modeled precise according to 1993 rules and the rest is also quite accurate.

This weekend Im away from my computing PC so I will post streamlines on monday.
A forgot to mentioned that ride height is 25mm with zero rake angle.

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LVDH
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Joined: Tue Mar 31, 2015 1:23 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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JJR wrote:
Fri Nov 29, 2019 9:12 pm
This is cool. It is interesting to see that there is such low pressure at the diffuser but not at the leading edge of the floor. Maybe you could create some streamlines to show from where the diffuser gets fed with air.
Also how accurately did you model the car? Did you use real dimensions or just eyeballed it?
Maim aero devices are modeled precise according to 1993 rules and the rest is also quite accurate.

This weekend Im away from my computing PC so I will post streamlines on monday.
A forgot to mentioned that ride height is 25mm with zero rake angle.
I actually really like this project. It is something archeological but about F1 cars and the kind I really like.
For this morning here is some more modern stuff:
Image
https://mantiumchallenge.com/cfd-images ... rina-2019/
It looks like CAEdevice and OKRacing had a good look at each others cars. JJR is the only one letting the air exit the radiator ducts from below, which is an interesting solution. Somehow I have the feeling that the CAEdev and OKR solution is the way to go. The small wing seems to direct the air in a favorable direction and the suction below probably helps extract the air from the duct. The two can probably tell us more.

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maunde
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Joined: Sat Nov 02, 2019 11:36 am

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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Im sorry if this has been covered, are there differences in the mesh quality between the standard dev Mantium (what we use while modelling our cars) and what is used for the competition?
A kiwi looking to fly like McLaren.

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CAEdevice
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Joined: Thu Jan 09, 2014 2:33 pm
Location: Erba, Italy

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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maunde wrote:
Sat Nov 30, 2019 8:52 am
Im sorry if this has been covered, are there differences in the mesh quality between the standard dev Mantium (what we use while modelling our cars) and what is used for the competition?
No, the mesh settings are the same. The only difference should be the number of iterations (4000 instead of 2500).

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CAEdevice
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Joined: Thu Jan 09, 2014 2:33 pm
Location: Erba, Italy

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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LVDH wrote:
Sat Nov 30, 2019 8:46 am
The small wing seems to direct the air in a favorable direction and the suction below probably helps extract the air from the duct. The two can probably tell us more.
Yes, the main function is to generate a small but not negligible suction (it increases the cooling flow a bit, from 3.0 to 3.1 m^3/s). It also isolates the rear wing from the cooling and bargeboard effects, and this makes the rear wing optimisation simpler.
On the contrary, it gives, by itself, much less df than I hoped.

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machin
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Joined: Tue Nov 25, 2008 1:45 pm

Re: [MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

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The final round of the MVRC 2019 is less than a day away....

The video will be live here at 13:00 CET:-



Early indications are for a really tight performance between the championship contenders....
COMPETITION CAR ENGINEERING -Home of VIRTUAL STOPWATCH