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design/size venturi tube (carburetor type operation)

  • Thread starter Thread starter Ilario
  • Start date Start date
Ah, here... So this is something I have to do for attempts? Don't you run away from this? and if I have to make a mold as I do to make "tentatives" that working with geometries of the order of 1 or 2 mm to point them on plastics is a gross? without talking about the invitation conities of the flow that are fundamental. . To do it in the workshop is suicide and I would never be sure that the evidence is truthful. . .
 
the "try and error" method is very used by engineers' deformed minds.

However the attempts you have to make them first on the piece of paper, when you find the solution proceed to realization. because your problem "undefined shadows entirely" is the only way to go.

you must have either a final speed or a reference depression otherwise you do not run:

make for attempts by paying attention that, being water, there is not too much depression to make it caviar.
 
Okay, since we're almost there, I apologize ignorance if I didn't say it before, but if I have a necessary flow that would be that of the product to be sucked (e.g. 1 l/min), that could be a reference to get depression? If you like?
 
Wow, if you have to suck from ambient pressure and you have the initial pressure of 3 bar...
It means you have to go to depression!
otherwise do not aspire!
advice, he works with absolute pressure. negative numbers hurt health!
in practice your p1 is 4 bar
p2 must be less than 1 bar, the lower the deeper the level from which you have to aspire. and as much as liquid as you want to aspire.
start with 0.5 bar and see what section you find. you could have incredible speeds
 
goes into a water softener, softeners eliminate limestone by passing hard water through resins, these resins hold limestone. but they are saturated and regenerated with sodium chloride (salt dissolved in water).
Therefore from the venturi passes the mesh water and must aspire this saline solution, of course according to the size of the softener (regenerate resin liquor) the amount of brine to be sucked in a given time varies, the more liters there are more brine I have to aspire therefore I should dimension more venturi with courses of different aspirations. Even competition does so, but I didn't want to copy theirs, I wanted to understand their size so that I can do "what I want when I want" :).
 
MBT said:
Wow, if you have to suck from ambient pressure and you have the initial pressure of 3 bar...
It means you have to go to depression!
otherwise do not aspire!
advice, he works with absolute pressure. negative numbers hurt health!
in practice your p1 is 4 bar
p2 must be less than 1 bar, the lower the deeper the level from which you have to aspire. and as much as liquid as you want to aspire.
start with 0.5 bar and see what section you find. you could have incredible speeds
Click to expand...
I think I understand what you mean, I have the water network at 3 bar, but since I taste something that has free fur in contact with the environment I have to calculate 1 bar of additional pressure right?
 
a great example, more than carburetors, are the spray paint guns. . .
which are also adjustable, so you can decide how much brine passes while keeping the water constant!
I don't know if it can be a suggestion...
 
Ilario said:
I think I understand what you mean, I have the water network at 3 bar, but since I taste something that has free fur in contact with the environment I have to calculate 1 bar of additional pressure right?
Click to expand...
I mean...
the pressure of 3 bar of the network is calculated considering that the atmospheric pressure is zero.
but to aspire an ambient pressure liquid, you have to do depression, i.e. negative pressure
not to mess with life, better to say that atmospheric pressure is 1 bar, so the net is at (3+1) 4 bar and to aspire just as long as you are under the 1 bar of ambient pressure
 
Please! thanks to you for the question because I'm learning too.

summing up:
water passes from the venturi and creates a depression that can suck the saline solution. it is in a separate tank and atmospheric pressure that through a venturi terminal duct. Right?
 
MBT said:
I mean...
the pressure of 3 bar of the network is calculated considering that the atmospheric pressure is zero.
but to aspire an ambient pressure liquid, you have to do depression, i.e. negative pressure
not to mess with life, better to say that atmospheric pressure is 1 bar, so the net is at (3+1) 4 bar and to aspire just as long as you are under the 1 bar of ambient pressure
Click to expand...
Yeah, maybe I explained badly, but I got it right then... just what you say...
 
PierArg said:
Please! thanks to you for the question because I'm learning too.

summing up:
water passes from the venturi and creates a depression that can suck the saline solution. it is in a separate tank and atmospheric pressure that through a venturi terminal duct. Right?
Click to expand...
That's right!
 
I would say, that knowing the scope of the brine, and given the diameter of the pipe, you could calculate the speed
from there, with formulas for load losses, calculate how much "depression" you need to get that flow.
by this value, using bernoulli, calculate the speed c2 and consequently the ø2 diameter of the conduit
 
Ilario said:
That's right!
Click to expand...
Here. because a missing data was the pressure you wanted to get out.

So you just need to know with which (de)minimum pressure can you aspire a certain amount (such as?) of brine (to have the correct "mix")?
do this you have a base to establish the adjustment for the various brine courses you need?

greetings
Mar
 
I would say that for today I had enough info to come up with something more concrete... I've been hallucinating right now. I've been doing some calculations this morning (and it's not the first time I try to make a robe) and I'm cooked... Anyway tomorrow I see to group all the info obtained and then I keep you updated on the results or questions possible... I thank you all for the moment, you are great;).
 

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