No worries. I don't know. But I do know that this...gato azul wrote:How do you know? - Sorry mate, I don't want to come across as argumentative, but I think it is fair to assume, that there is still a need to went the air from the side pod intakes somewhere, otherwise we would need to see other outlets, if you would like to use Vent 1 exclusively for your VD concept.
...looks different than this (the former is much smaller, and I did a horrible job selecting pictures to reflect that).
And that this...
...looks suspiciously like a diffuser.
I've also not discounted the possibility that cooling air is added to this system. In fact, I said that it might even be beneficial. Every car's gotta cool its engine, and that air's gotta go somewhere after it has. Might as well do something else with it, yanno?
EDIT: It should be noted that the outer edge of the VD diffuser is nearly identical to the size and shape of the non-VD vent. For that reason, I think it's safe to assume that the VD can handle both the flow sourced from the air box inlets as well as cooling air.
You've essentially just rephrased what I've said already. But, I would point out that pressure will be vented from Exit 1 first, because that vent is larger than Exit 2, and pressure always follows the path of least resistance.gato azul wrote: How about this:
The intakes (ears) around the airbox feed directly the VD slots (Vent 2), if the snorkel/center pillar part becomes saturated, all excess air is vented into the cannon style center exit (Vent 1), to ensue, that you have maximum airflow through the inlets at all times.
The excess air joins the air which comes from the sidepods/coolers anyway in is released into the low pressure zone behind the car, helping to reduce drag a bit along the way.
The element/diffuser around the exit (vent 1) helps to extract the extra portion of air, which comes from the "ears" in addition to the normal air which comes via the sidepod/radiators.
Again, you've essentially just rephrased my explanation. The whole point of Exit 1 is so that the duct doesn't completely pressurize. By default, that means Exit 1 will never be overwhelmed.gato azul wrote:I do agree with you about the primary function of the VD (vent 2) and how it will affect the airflow around the wing, but I think that the sequence is the other way round, and that you never exceed the capacity of vent 1 to make vent 2 (VD) work.
Vent 1 will just "vent" any excess air which vent 2 (VD) can't handle, to ensure that you don't choke the intakes (ears)
That said, the system's diffuser is necessary to this end, because Exit 1 would be overwhelmed without it if the vent is appropriately sized. Remember, this system must accumulate pressure before it begins to work. That means Exit 1 must be large enough to never be overwhelmed, but small enough to allow pressure to escape from Exit 2. If Exit 1 is too large, the VD can't accumulate enough useful pressure. If Exit 1 is too small, the VD can't release enough pressure to prevent the duct from becoming completely pressurized and choking. This is the pain-in-ass tuning part, getting the sizes of the inlets and exits just right.
For another angle, how about this?
Inflate a balloon and just hold the pressure in with your fingers. Apply a piece of tape elsewhere on the balloon. Puncture the balloon through the tape, and that hole will then vent pressure. Even if you slowly release some of the balloon's pressure with your fingers, the taped puncture will still vent pressure until there's none left. But, it will escape from the mouth of the balloon at a higher rate. This is the VD in a nutshell.
Ambient pressure as in normal atmospheric pressure at sea level or thereabout. The pressure within the duct will be higher than ambient pressure. That said, the duct's pressure will be lower than that of the air being inducted. Inlet pressure is proportional to the airspeed of the car, and, if tuned properly, it will always be greater than that found within the duct. If this is not true, the duct cannot accumulate pressure, which is very necessary here.gato azul wrote:[...]
Sure you need a pressure differential, otherwise you won't have any air flow, but I'm not quite sure about your definition of "ambient pressure".
I apologize if I'm mangling terms here. I'm not a trained engineer. (Can't you tell?)
Tuned properly, this system is sound as (I think) I've described it. I'm still hoping that someone with an engineering background who understands exactly what I'm saying will step in and explain it better than I have thus far.
