Red Bull RB8 Renault

[ing]

They have buried the nozzle deeper than before. The higher sides limit the amount of spread of the exhaust, in order to keep it concentrated.

I believe they are, like McLaren, tripping the prevailing flow field (flowing inboard ahead of the rear tires) across the outboard edge of the tunnel to create a vortex sheet that helps drive the exhaust flow down in combination with Coanda effect.

You can see from the picture showing the heat effects of the exhaust plume that the flow direction of the exhaust is generally more inboard.

[Corso]

Hello,
after reading this forum for about a year, I decided to register=).
And here is my question: have anyone heard off throttle sound of RB 8?
Looks like they are still use some blowing, not as much as last year.

[Coefficient]

Could the opening on top of the side pods be the exit for the slit on the nose? Maybe to improve airflow?

http://www.racecar-engineering.com/wp-c ... /uprb8.jpg

[raymondu999]

Coefficient - I think Thomin's talking of the outlet next to the helmet.

[Coefficient]

Coefficient - I think Thomin's talking of the outlet next to the helmet.

Yeah sorry, didn't explain myself. I just wanted to compare the Melbourne exhaust position with the test exhaust position.

The fuel residue on the new solution gives us an indication of plumage. It also suggests that the bodywork surrounding the exhaust exit is possibly obstructing the exhaust. Perhaps the pipe is pointed too aggressively at the bodywork. I think the fact that fuel particals are being dumped on top of the sidepod suggests that the Exhaust Fluid Flow is losing energy quite quickly or they are doing something strange with the overrun that makes the car vomit unburnt fuel onto the bodywork. Potential fire hazard over a race distance? The white stuff actually looks like the waxy stuff used in the production of Plastique. It's a petrol derivative that causes all that black smoke when a Geli Bomb explodes and it burns like hell for ages after the initial blast for maximum damage.

You can make a rudimentary form of it by mixing petrol and vaseline.

[FakeAlonso]

[Rikhart]

Is that flow viz on the tyre?

[Pierce89]

Hello,
after reading this forum for about a year, I decided to register=).
And here is my question: have anyone heard off throttle sound of RB 8?
Looks like they are still use some blowing, not as much as last year.

We've heard it, and we've argued over it

[GrizzleBoy]

Could the opening on top of the side pods be the exit for the slit on the nose? Maybe to improve airflow?

So, can we finally stop this whole "RB are putting the exhaust gases down the (out)side of the bridge at low speeds" thing now?

The majority of the exhaust is clearly not going there.

[FakeAlonso]

No DRS duct for RB

[.poz]

No DRS duct for RB

Aren't they using something similar to Ferrari (or vice-versa)

[Adrian Newby]

So, can we finally stop this whole "RB are putting the exhaust gases down the (out)side of the bridge at low speeds" thing now?

The majority of the exhaust is clearly not going there.

Nope, sorry! That would be too easy.

1) The center of those exhaust markings points straight down the corner of the bridge (where the bridge is catching the light).

2) The exhaust markings would be for the full range of velocities, not just slow or fast.

3) There is a bulge in the bodywork just below the "R" in Renault that the inside portion of the exhaust is running into, thereby exaggerating the markings on that side.

4) In contrast, the bodywork on the outside falls away from the exhaust, understating the exhaust on the outside. If there was as much bodywork on the outside of the exhaust, you would see as much or more marking as you see on the inside. To make the point, there is no bodywork over the top of the exhaust, but we certainly can't say that means there is no flow there.

5) Find a photo of this from above and this all becomes more clear. The sidepod/bridge are waisting in toward the center of the car, and your mind just naturally wants to make everything else parallel with that. But in reality, and when seen from above, which is the proper angle to judge in/out angles, the exhaust is flowing over the corner of the bridge, just aft of the intake for the tunnel.

[Crucial_Xtreme]

So, can we finally stop this whole "RB are putting the exhaust gases down the (out)side of the bridge at low speeds" thing now?

The majority of the exhaust is clearly not going there.

No we can't. I'm not sure what picture you're looking at. Yes the exhaust plume is wide. However if you were to follow the edge of the exhaust plume around to the point most rear of the car, you will see that it makes a point right at the new modified bridge, the crest of it. They've modified it to help the airflow. If anything the pic you quoted and the one below show it's doing exactly what they want. IMHO. But this discussion is for another topic.




Edit: Great minds think alike Newby

[raymondu999]

Is that a secondary tunnel behind the original tunnel?

[dren]

Is that a secondary tunnel behind the original tunnel?

That's a turning vane, the one right before the tire?