Vehicle & Technical > Discovery
HiClone air swirler
Tyke:
Think your right mate . . . . it always goes like this when the engineers get thinking a bit . . . . but hey, it's only what some of us do for a living :lol:
shaun and co:
Be interesting to see what you come up with for this one. Cant say i notice much difference with or without snorkel but then me and observation............... :roll: :roll: :roll:
thermidorthelobster:
--- Quote from: "Tyke" ---
--- Quote --- Safari snorkel aperture has a cross-sectional area of 14x10cm
--- End quote ---
But only at some infinitely thin section . . . . the tube is tapered . . . . . and also not of true form, this complicates determining the losses at bends etc.
--- End quote ---
What do you mean, infinitely thin section? None of my snorkel is infinitely thin, otherwise it would break :? I'm talking about the bit that sweeps through the stationary air column. Obviously I'm simplifying but that doesn't mean you can't make generalisations. The figure I got for the swept volume of air seems to be orders of magnitude greater than the engine intake volume. So the things you say will make a difference, but they're not the overriding factor. Just because you simplify the calculations doesn't mean the model doesn't work.
Tyke:
--- Quote ---Just because you simplify the calculations doesn't mean the model doesn't work
--- End quote ---
Not suggesting it does mate . . . . just thinking about the 'nitty-gritty' .
The thin section refers to the csa of the column of air, inside the snorkel, at a given section along it's length and the effects these changes of csa will have on the velocities and pressures within the intake system.
Agreed that taking the swept volume at the intake is perfectly adequate to determine the volume of air that should, theoreticaly, be transfered through the sytem, and give you a velocity of the air at the intake . . . . but what happens beyond that . . . . ?
I'd expect to see the airbox pressurising, across the air filter, as a result of the air being scooped into the intake and a measurement of this differential across the air filter compared to a 'standard setup' would give an indication of any potential fuel charge improvements that may be a result of fitting a snorkel.
Combine this with the fact that high pressure always migrates to areas of lower pressure, in an attempt to loose kinetic energy, then it stands to reason that if the pressure is lower on the engine side of the air filter then more air will be sucked/forced through the system into the engine. This will result in a higher content of oxygen available to mix with the fuel. Given the effects of the intercooler making the air charge denser then it would also stand to reason that the engine would see a better quality fuel/air mix and hence give a bigger bang on ignition . . . . . . within reasonable limits . . . . :twisted: . . . . engines can run a bit 'warm' with the mix on the lean side
Come on RRB . . . . lets have some data to play with :wink:
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