Well, I will be ordering the remainder of my parts tomorrow. I can't wait to get my car all back together.
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Originally posted by 325ix View PostWell, I will be ordering the remainder of my parts tomorrow. I can't wait to get my car all back together.
Originally posted by SpasticDwarf;n6449866Honestly I built it just to have a place to sit and listen to Hotline Bling on repeat.
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Ugh... I have forgotten more than I want to admit; who wants to help with Fluid Dynamics?
I need to determine flow rate of water coming out of a pressurized pipe (3/4" ID).
Water pressure is 40psi, hole orifice size is 0.25" diameter, and there are fifteen (holes) all on the same horizontal plane.
I have determined the area:
A = pi * r^2
A = pi * (.125")^2
A = 0.049087 in^2
A = 0.00034088 ft^2
I have the head pressure:
H = 2.31 * Line Pressure * Specific Gravity
H = 2.31 * P * Sg
H = 2.31 * 40psi * 1.00 (Sg of Water)
H = 92.4 feet
I have the Orifice Geometry:
K = 0.62 (provided by fluids literature)
Here's the issues I'm running into; there are a few ways to determine flow per orifice:
- find the orifice velocity by take the square root of: 2 * Gravity (32 ft/sec^2) * Head Pressure
- then determine flow rate by multiplying: area of one orifice * orifice velocity * K
- then converting the flow rate in ft^3 / sec to gal/min
OR
- flow rate (gal/min) = 25 * area of orifice * K * (head)^0.5
Problem is, I'm seeing numbers that are simply unrealistic with my physical experiment.
Anyone wanting to shed some help during the no-homework college break?
- Erik• Pattern Draft Imaging.com - "...Where Engineering Discipline and Photography Merge as One..."
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Metal Mover @ www.milehighcarhelper.com
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Originally posted by kablammo View Post
<-- Owned 3 of those cars.
Those motors were cool for their time. They aren't very special anymore, at least in terms of powerband/specific output.
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Originally posted by flying_violin View PostIs this a theoretical problem, or a real-world setup that needs to actually work?
I'm trying to mathematically show a client why a certain flow rate works for their application, and showing them a movie of proof just doesn't cut it.
- Erik• Pattern Draft Imaging.com - "...Where Engineering Discipline and Photography Merge as One..."
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Erik - For screens & perforated orifices, you've got to consider the open-area (percent open area) - hole sizes area versus full orifice size, and also blockage factors (hole size, number of holes). Don't recall the CFD details offhand - it's been a while - but I think that might be what you're missing considering...
Tom
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Originally posted by bluefox280 View PostReal-world.
Alpine II 318is
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Originally posted by flying_violin View PostDo the 15 holes lie in series along the pipe...
- Erik• Pattern Draft Imaging.com - "...Where Engineering Discipline and Photography Merge as One..."
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