Discuss the sport you love with other motorsport fans
But, isnt that actually above the diffuser? seems like all that air is going to pass above it... that would be counter-productive. But who knows, maybe there's something allowing all that air to pass below
As long as its higher pressure above than below its downforce right? The shape looks to simple to be making something significantly higher than atmo though... then again i was asleep for most of my fluid mechanics lectures...
To have a tight *ss back there, they're su_cking it all in I should know, I do that often when I have pictures taken.That's gotta have an effect. I agree it's smooth back there as a babies bottom, but the air getting to that area is not the cleanest.
I love F1.
But, isnt that actually above the diffuser? seems like all that air is going to pass above it... that would be counter-productive. But who knows, maybe there's something allowing all that air to pass below
Well, no because the top side of the diffuser is curved and therefore will basically act as another wing element. The diffuser underside acts to accelerate air passing under the car - this creates lower pressure, in effect 'duckling' the car down onto the track. I believe it is more beneficial to minimize the amount of air flowing underneath the car, but i'm not knowlegable enough to state that as outright fact, i'd have to check...
To have a tight *ss back there, they're su_cking it all in I should know, I do that often when I have pictures taken.
I love F1.
You sure you were talking about F1??But, isnt that actually above the diffuser? seems like all that air is going to pass above it... that would be counter-productive. But who knows, maybe there's something allowing all that air to pass below
Well, no because the top side of the diffuser is curved and therefore will basically act as another wing element. The diffuser underside acts to accelerate air passing under the car - this creates lower pressure, in effect 'duckling' the car down onto the track. I believe it is more beneficial to minimize the amount of air flowing underneath the car, but i'm not knowlegable enough to state that as outright fact, i'd have to check...
No. Its more beneficial to have as much air as possible (and at the highest speed possible) passing underneath the car. If they have a certain ammount flowing underneath the diffuser, whatever air is passing above it is actually reducing the pressure difference (downforce) produced by the diffuser. Unless they allow some of this air (initially flowing above the car and thus 'missed' by the diffuser) to go underneath and feed the flow going below the diffuser; then they're actually feeding the diffuser and thus creating more downforce.
So....... from what i see, if they have a way of using the air going above the car and channeling it to go below, then they are effectively increasing the downforce produced by the diffuser. MAYBE that's what they are doing...
OR... They are actually increasing the cross-section to slow the velocity of airflow passing above the diffuser. This will also increase the pressure gradient (downforce).
I dont think they are looking for another wing element....
that sure is some stuff you know there!,
that sure is some stuff you know there!,
Dont worry... everyone will know how it works in a few weeks time
It is not necessary beneficial to have as much air as possible feeding under the floor. You need enough to feed the diffuser and not much more. The diffuser works on the principle of an expanding volume of air. As the modern diffusers are not as powerful as they used to be, they cannot cope wIth too large a volume of air. The reason the floors have the Sharp bevelled edges is to prevent air trying to migrate from above the floor to underneath. The turning vanes ahead of the side pods, and the Renault R31 exhausts work as an attempt to seal the floor by trying to create vortices down the side of the car. The large volume between the rear tyre and the chassis is an attempt to give this and the turbulence of the wheel itself, somewhere to go. Feeding the exhaust into this region adds to the volume of air in this area, and helps pull the side vortex through.
Just thought I'd help clear that up......
It is not necessary beneficial to have as much air as possible feeding under the floor. You need enough to feed the diffuser and not much more. The diffuser works on the principle of an expanding volume of air. As the modern diffusers are not as powerful as they used to be, they cannot cope wIth too large a volume of air. The reason the floors have the Sharp bevelled edges is to prevent air trying to migrate from above the floor to underneath. The turning vanes ahead of the side pods, and the Renault R31 exhausts work as an attempt to seal the floor by trying to create vortices down the side of the car. The large volume between the rear tyre and the chassis is an attempt to give this and the turbulence of the wheel itself, somewhere to go. Feeding the exhaust into this region adds to the volume of air in this area, and helps pull the side vortex through.
Just thought I'd help clear that up......
That's what i thought. Otherwise teams wouldn't be running cars as low to the ground as possible!! F1ea's theory also contradicts the idea behind why that Brabham 'fan-car' (and the Chaparral 2J for that matter) was so damn good - and there wasn't much airflow if any at all under those cars.
...which is what i said further up!
That's what i thought. Otherwise teams wouldn't be running cars as low to the ground as possible!! F1ea's theory also contradicts the idea behind why that Brabham 'fan-car' (and the Chaparral 2J for that matter) was so damn good - and there wasn't much airflow if any at all under those cars.
It's not necessarily the amount of air but the SPEED for the air that creates the difference in pressure. So the diffuser's job is simply to create negative pressure because of the expanded volume of space versus the relatively tight space under the car. It creates a vacuum that sucks the air into that space and the veins of the diffuser keep it all neat and flowy out the back maintaining/accelerating the flow under the car. So it works like that fan just not as efficient. I remember them trying to sell the fan as "cooling" LOL
That's what i thought. Otherwise teams wouldn't be running cars as low to the ground as possible!! F1ea's theory also contradicts the idea behind why that Brabham 'fan-car' (and the Chaparral 2J for that matter) was so damn good - and there wasn't much airflow if any at all under those cars.
It's not necessarily the amount of air but the SPEED for the air that creates the difference in pressure. So the diffuser's job is simply to create negative pressure because of the expanded volume of space versus the relatively tight space under the car. It creates a vacuum that sucks the air into that space and the veins of the diffuser keep it all neat and flowy out the back maintaining/accelerating the flow under the car. So it works like that fan just not as efficient. I remember them trying to sell the fan as "cooling" LOL
they ride the car low so that the cross-section is smaller, and this increases the air velocity. The diffuser allows this fast flowing air to exit cleanly from underneath the car; at such high velocity they'd have lots of energy loss otherwise. So the vacuum is created by a pressure difference, the more difference there is between the upper and low flow, the more downforce they'll produce. So for example, if they allow low pressure above the car (by increasing velocity), the pressure difference will be less...
Because the ammount of air above and below "should" be the same due to mass conservation stuff (its not so straight forward because air varies density with pressure), the remaining possibility to create a velocity differential is by having a different cross section.
See our F1 related articles too!
