Nose cone idea

Here are our CFD links and discussions about aerodynamics, suspension, driver safety and tyres. Please stick to F1 on this forum.
manchild
17
Joined: Fri Jun 03, 2005 9:54 am

Nose cone idea

Postby manchild » Fri Aug 24, 2007 9:27 pm

Two versions shown on pic - same idea. Would it work? :oops:

pic shows cross section of nose cone
Image

Image
Last edited by manchild on Fri Aug 24, 2007 10:49 pm, edited 1 time in total.

Tom
0
User avatar
Joined: Thu Jan 12, 2006 11:24 pm
Location: Bicester

Postby Tom » Fri Aug 24, 2007 9:33 pm

It might work, you can't really tell without a wind tunnel or CFD, but you would hit trouble in the crash tests.
Murphy's 9th Law of Technology:
Tell a man there are 300 million stars in the universe and he'll believe you. Tell him a bench has wet paint on it and he'll have to touch to be sure.

tomislavp4
0
User avatar
Joined: Fri Jun 16, 2006 4:07 pm
Location: Sweden & The Republic of Macedonia

Postby tomislavp4 » Fri Aug 24, 2007 10:11 pm

Yeah, I´ve tought of this also.

[IMG:150:120]http://img337.imageshack.us/img337/280/untitled1tj4.th.png[/img] (click for big)

the lower picture shows current designs, the air from the front wing hits the nosecone on the lower side creating LIFT

in the new design the air goes over the nosecone (part of it I guess) so the lift is not experienced + the wing-shaped front section of the nosecone adds downforce

But this is only my opinion, we still need CFD to see if it really works :wink:

Carlos
11
User avatar
Joined: Sat Sep 02, 2006 6:43 pm
Location: Canada

Postby Carlos » Fri Aug 24, 2007 10:59 pm


allan
0
Joined: Sat Jan 14, 2006 9:14 pm
Location: Waterloo, Canada

Postby allan » Fri Aug 24, 2007 11:13 pm

i agree with tom on this idea...
I thought some supercars used this design too, such as the F50 and the Paganni, am i right?

Ciro Pabón
218
User avatar
Joined: Tue May 10, 2005 11:31 pm

Postby Ciro Pabón » Sat Aug 25, 2007 12:03 am

It seems a solid idea. Reminds me of the slots on the front of aircraft wings. I think of three effects that can diminish its benefits.

1. I don't know if the lift that tomislavp4 mentions is related somehow with the air you wish to direct to the undertray. In this case, maybe part of the downforce generated in the Manchild Nosecone could cost downforce at the undertray, because it would rob it of air.

2. The air that exits the "slot", in front of the "windshield" also interacts with the upper body. I don't know if the current body design has the "wrong" shape (it's convex) or what effect has this air on the body.

3. From intuition, it seems to increase drag. The car has two noses now and the "second" one is blunter than the current one.

I can think of three good things:

1. It's cool.

2. I think that the frontal crash tests would have no problem (after all, you can design the shape of the beam box that connects the "new nose" to the rest of the car to give it the rigidity desired, at the cost of section of the air passage. Maybe the critical forces would be lateral. Are there lateral crash tests?

3. Again, the design offers a "crushable volume", with two separate sections that could be designed to "collapse" in front of the driver. That maybe can be used to diminish deaceleration exerted on the "main body" on a crash. It's like a front wing on steroids in this sense.

... and a happy Friday afternoon, btw. ;)
Ciro

sasquatch
0
Joined: Tue Apr 22, 2003 2:31 am
Location: Melbourne, Australia

Postby sasquatch » Sat Aug 25, 2007 10:28 am

why can i never see the pictures?? Are they removed quickly from the server?

manchild
17
Joined: Fri Jun 03, 2005 9:54 am

Postby manchild » Sat Aug 25, 2007 11:36 am

Ciro Pabón wrote:1. I don't know if the lift that tomislavp4 mentions is related somehow with the air you wish to direct to the undertray. In this case, maybe part of the downforce generated in the Manchild Nosecone could cost downforce at the undertray, because it would rob it of air.


Thanks for clarifications of pros and cons Ciro (saves me time). :wink:

Diffuser is fed by air picked up below sidepods. Besides, front wings are high and the air that would go trough nose cone would be the air traveling on top of the front wing. Also, few years back I had another idea - something like this one only inverted with aperture in nose cone that would direct air below and I got answers that it would kill feeding of airbox...

BTW, perhaps benefit would also be better feeding of airbox and with slightly cooler air?

allan wrote:i agree with tom on this idea...
I thought some supercars used this design too, such as the F50 and the Paganni, am i right?

They use such outlets but for hot air from radiators I think.

sasquatch, can you see them now? I have no problem seeing them. Anyone else?

Image

Image

RH1300S
1
Joined: Mon Jun 06, 2005 2:29 pm

Postby RH1300S » Sat Aug 25, 2007 12:08 pm

Nice idea - thinking out of the box again? :D

My thoughts based on observation and guesswork :?

My understanding of how this works.....this type of arrangement is used often in sports cars to get air out of the heat exchangers (hate to word radiator ;)). The idea is to exploit the low pressure as the air accelerates over the nose of the car. The air in front of the heat exchanger is higher pressure, so is encouraged through it and into the low pressure area on top of the nose.

Probably not so much downforce inducing - more a reduction in lift.

I suppose it would only work if the air under the nose is at higher pressure than the air over it.

The air under the nose at that point is (presmuably) acclerated through the gap between the wing and the nose - so there may not be such a pressure difference.

Of course, doing this robs the under floor of the car of some (possibly) very useful air..................

Cool thinking 'though.

tomislavp4
0
User avatar
Joined: Fri Jun 16, 2006 4:07 pm
Location: Sweden & The Republic of Macedonia

Postby tomislavp4 » Sat Aug 25, 2007 12:51 pm

I think I can make quick model of a car with this nose in SolidWorks but only if someone can run a CFD simulation later :)

MMUK
0
User avatar
Joined: Sun Apr 08, 2007 4:35 am

Postby MMUK » Sun Aug 26, 2007 11:56 pm

I reckon going with the inverted aperture would be better, feeding more air under the car. Also, in the current setup the air could have a difficult time negotiating the current aperture angle, you'd have to have a favourable pressure gradient for it to want to go up the aperture.

Ill mesh and run any CFD models you have if required. Flow vis pics as well as numerical data will follow. It would have to include a simple front wing though, to gain a better understanding of the required onset angle onto the aperture.

modbaraban
0
User avatar
Joined: Thu Apr 05, 2007 4:44 pm
Location: Kyiv, Ukraine

Postby modbaraban » Mon Aug 27, 2007 12:34 am

MMUK wrote:I reckon going with the inverted aperture would be better, feeding more air under the car.

Wouldn't that create quite a lift?

MMUK wrote:It would have to include a simple front wing though, to gain a better understanding of the required onset angle onto the aperture.

It would be perfect to have a model of an existing car to run it with and without the aperture to see the difference. 8)

MMUK
0
User avatar
Joined: Sun Apr 08, 2007 4:35 am

Postby MMUK » Mon Aug 27, 2007 1:08 am

perhaps locally on the specific region of the nosecone, but the downforce gain under the car due to increase mass flow could outweigh it if designed properly.

The huge surface area of the underfloor means its the place where downforce gains are easily made.

MMUK
0
User avatar
Joined: Sun Apr 08, 2007 4:35 am

Postby MMUK » Mon Aug 27, 2007 1:15 am

modbaraban wrote:It would be perfect to have a model of an existing car to run it with and without the aperture to see the difference. 8)


yer that would be ideal 8)

but running a full car requires serious computing power to achieve reasonable results!

tomislavp4
0
User avatar
Joined: Fri Jun 16, 2006 4:07 pm
Location: Sweden & The Republic of Macedonia

Postby tomislavp4 » Mon Aug 27, 2007 8:04 am

I can model simple stuff but not current f1 cars :oops: car with simple wings an so is ok but for a more complex model I must leave it to someone else :?

Anyway this is just to see how the air will flow over the cone so we don´t really need mp4-22 :lol: something simple will do the job :wink:




Return to “Aerodynamics, chassis and tyres”

Who is online

Users browsing this forum: CCBot [Bot], Tim11RS and 0 guests