Quote:
Originally Posted by freebeard
With the bare metal engine compartment have you thought about the aerodynamics of that compartment interior?
My thinking would be full bellypan with louvers at the rear corners of the hood, to throw hot air around the A-pillars.
|
The rear corners of the hood are likely to be more of a high pressure area under the effect of that side profile graph.
If one moved them outward to the top back of the fenders, where that curve is ending parallel to the car's flanks; maybe... But that's just my basic understanding of aero. And any aerodynamicist worth his salt knows; he doesn't really know for sure.
What that aero freeware called again? That may be the tool to employ to more accurately see what's what.
"
the bare metal engine compartment":
I've thought that a gentler radius from the firewall to the 'below foot' floorpan, along with an extended, slightly drooping but bump-up-able, possibly adjustable bellypan may be an idea.
But radiusing the firewall-floorpan is not an easy mod that wont effect chassis rigidity etc.
At this point of modification the: Up through the A-pillars to a roof slot above the sun visors thing becomes feasible.
I'd say that a deformable and bounce back front skirt from conveyor belt is easier. (if not lighter)
One can think of this as 'pulling a vacuum into which the engine compartment exit air can flow more easily, or without competition.
I NB that one would want to add a much (left-right) curvature as possible to such, to give it rigidity in the up/down direction as well as better aero.
ie: The skirt would start as far forward as the front most bit of bumper in the center and curve backward as much as possible from there, and all that while looking good!?
Also to NB:
Exhaust has around 4X more volume than intake air due to temperature. (on average through the exhaust length)
That means that, after any tuned lengths and Pressure Wave Termination, cooling it asap will result in less back-pressure...
There is also evidence of very noticeable decreases in noise from cooling exhaust.
ie:
From (and including) any Pressure wave termination back; cooling the exhaust is desirable for economy etc and under-body flow directing and perhaps some small cooling fins are worth a thought.
Less desirable is the condensation of the gallon of water formed for every gallon of fuel burned, rusting your mufflers etc out!
Then there's that whole Optimal Place to Exit thing.
(I NB that the max vacuum area of your beetle seems to be above the number plate from that video and NB that these might be made to exit in that area.
)
Today
Other popular topics in this forum...
