Red Bull RB8 Renault

[dren]

Is that the fuel door?

[Hail22]

I see a cylindrical shape inside that housing, possibly venting duct for hydraulic/Kers heat? thus creating hot flow to the RW?

[avatar]

hi all,

just to throw another theory in to the pot;

I and a couple of other before me mooted a possible use of the nose hole air as a passive flow switcher for a stronger flow further back on the car.

Given the apparent potential( judgung purely from opinions people have posted here) for the exhaust to be taking 2 different routes over the bridged area, is it not possible that there's a fluid switch varying the exhaust flow to give different benefits at different air speeds from the nose hole ...?

This does of course require the nose hole to be routed such that it still has just enough energy to switch a flow AND be tuned so it switches flow to create a desirable effect at desirable speeds - that may be beyond even Newey and his Aero team.

[Adrian Newby]

Here is my support for my theory...

And solid support it is.

Here's the support for my own theory, which is that if you're going to photoshop made-up airflows, you should at least make them pretty...

You're hired! That kicks the crap out of mine!

[hardingfv32]

I and a couple of other before me mooted a possible use of the nose hole air as a passive flow switcher for a stronger flow further back on the car.

1) There is no evidence that there is an actual duct i the nose. We have not seen a hole in the front bulkhead.

2) Routing the flow back to the exhaust would be almost impossible.

3) If you can actually get the flow routed to the exhaust area, the flow will be close to zero at the outlet do to drag in the duct.

4) we can not see an outlet near the exhaust tip.

Brian

[type056]

What are these?

[hardingfv32]

What are these?

Damage to a carbon fiber strip (stepped Gurney).

Brian

[Pup]

Damage to a carbon fiber strip (stepped Gurney).

Can you provide calculations to support that theory?

[joeyg02]

I don't mean to sound "frank" in this post, all I want to say is the article I posted a few pages back (based off information from team members in the garage, not necessarily RB team members) says that based off of the burnt marks on the heat shields the exhaust flow isn't going where RB want it to.

Basically what i'm saying is why are we (me included) arguing through 3 or 4 pages debating where the exhaust flow is going based on pictures from Barcelona, when they will most likely change the design to get it to flow where they want it to.

My personal "opinion" (and it is just that, an opinion, because i'm nowhere near an expert in air-flow) would be that based off of the "half-pipe" type curve in the bodywork directly behind the exhaust, they would want it to go somewhat into the opening directly underneath the exhaust that appears to lead directly to the 'tunnel' that exits on the floor closer to the diffuser. With that being said, I don't see how it would be possible with this current design (even though the depression directly behind the exhaust is pointing at it), especially at higher speeds because the air coming around the sidepod wouldn't allow the exhaust to do so (at least I don't think it would).

To make sense of my last paragraph and sum all of this up, and this is pure speculation... If that's where they are wanting the exhaust flow to go (into the tunnel, like I predicted) and it's not currently going there, then they need to make some sort of modification to the design directly behind the exhaust pipe to get it to go there.

Now, if anyone can please tell me, am I a complete idiot for thinking this? Or is it plausible? lol. Thanks for listening to my rant.

[bhall]

Any idea what is this?

It's the same as these, only with fewer slots. (For those of you scoring at home, the following is the RB7.)


(Click to enlarge)


(Click to enlarge)

[avatar]

I and a couple of other before me mooted a possible use of the nose hole air as a passive flow switcher for a stronger flow further back on the car.

1) There is no evidence that there is an actual duct i the nose. We have not seen a hole in the front bulkhead.

2) Routing the flow back to the exhaust would be almost impossible.

3) If you can actually get the flow routed to the exhaust area, the flow will be close to zero at the outlet do to drag in the duct.

4) we can not see an outlet near the exhaust tip.

Brian

1) agreed, but it's not clear there is no duct
2) not so sure about that, some of the f-duct solutions were further forward than MCLs, would it be that hard to route to the side pod rather than the engine cover?
3) I believe I included a caveat for that in my post
4) I haven't seen a clear pic of the whole exhaust tip myself - I may have to do a bit more hunting unless you can point me in the right direction?

[kilcoo316]

The nozzle is not pointed down because it is illegal to point it down, or even straight back: "From the side the exhaust must exit tailpipe-up and between 10 to 30 degrees from the reference plane."

Adrian Newey takes it from the minimum of 10 degrees up and channels it downward as much as possible.

I didn't even bother to read the technical regs - obviously you have - and actually considered the exhaust sealed diffuser... are you losing the run of yourself?


This exhaust flow is supposed to hit that vane infront of the wheel in some sort of coherent stream-tube, roll up and continue as a longitudinal vortex along the side of the diffuser?!?!

So what happens when the cross-flow around the side-pod hits it*? No way will it emerge in any coherent form, it'll be swept inboard in the cross-flow. To... yep... you've guessed it, that section of diffuser outside the deeper centre section.


*I know it doesn't work in whatever way RBR intended (as you've previously mentioned).

[Crucial_Xtreme]

[...] If you look at Neweby's post, there's clear markings as to where the exhaust is exiting and which way it is initially flowing. Which it directly towards the inside of the rear tyre.
McLaren are obviously doing this, why are we to think RB doesn't have the same intentions?

[hardingfv32]

So what happens when the cross-flow around the side-pod hits it*? No way will it emerge in any coherent form, it'll be swept inboard in the cross-flow.

+1

Brian

[shelly]

GdS says RB found a loophole in the regulations for the RW F-Duct. You still think is a reflection?

Yes and no. I think there is some kind of gizmo, but I think what was shown in the picture Piola has photoshopped were just reflections of the rear suspension members.