Pipe Cross-Section, Water Flow Calculation: Internal Diameter, Formula, Thick & Thin Sections

Hello.
I don't know if there is any formula or program to calculate something like this.
Well, I have a specific pipe section, one thin and the other thick, it is about the internal diameter of the flow.
The pipe is of course for the flow of water.

But you messed it up, I don't understand any of it, but maybe this will tell you something. I don't know any pattern, but one should be, the rule is - we have a thick pipe, we reduce to a heavier one; in heavier, the pressure will drop, but the flow speed will increase, if we reduce it back to a thicker one, the pressure will increase minus the losses, the flow speed will decrease, this is how the Weturi venturi works (I do not know how to spell it, sorry if I wrote it wrong) to change the pressure, we use reducers when closed tap, the pressure in the pipes will be the same. If that doesn't help, describe it in more detail, maybe I'll come up with something.

Two important issues are whether you are interested in pressure drop or water flow. And one more thing is whether it is about the flow of water in the pipe or the outflow of water from this pipe to the atmosphere. It's best to put a diagram with written values, i.e. some assumptions, and what you want to receive, then I think I can help you.

For some theory, see 'fluid viscosity' and 'laminar flow'. However, this is going deep into hydrodynamics and it will not be possible without the basics of physics.

How to calculate the flow rate of water from a pipe with a known diameter and static pressure.

And what is the length of the pipe ??

Please provide a formula or a table to calculate for different pipe lengths.

You don't want to look for me in physics textbooks either.

see Bernoulli equation

fluid speed:

v = (4 * Qv) / (3600 * ? * r ^ 2) [m / s]

where: Qv = m / ? [m3 / h] - volume flow (expenditure)

m - flow rate [L / h]

? - fluid density [kg / m3]
water-998, glycol-1115

I have trouble quantifying the amount of water flowing in a 2 inch pipe with a pressure of 3 atmospheres. Although I found answers on a similar topic, I do not know how to calculate it. What will determine the amount of flowing water in the pipe, what are the dependencies, diameter, pressure, distance of water supply. I am trying to replace the water pipes on my farm and I want to do it on my own. In the network I want to have a pressure of max 3 atmospheres, the maximum peak water expenditure I need is 10 m3 per hour, the distances are 50-100 m what kind of PE 50 or PE 63 pipes to use?

analyze it and if you have any questions, I can help

best regards


Please correct any spelling mistakes
mod - mirrzo

Thanks for the answer. Honestly, I don't understand much of it. I am a farmer by education and I can help in this area, but in this subject I am a leg. Practically, I do not need to have perfect information, because if I wanted to get it, I would have to report to the designer, I will only mention that this pipe will supply livestock buildings (5 pcs) with a total staffing of about 3,000 pigs (250 DJP), but I am most interested in during the rush, that is, filling the sprayer (5 m3 in 0.5 hours) at a pressure of 3 atmospheres will flow through the PE 50 pipe as much water as needed or must be 63. How can someone please give it in a peasant fashion, how much water will flow through these pipes at a pressure of 2 , 3, 4 atmospheres. The hydrophore is powered by a PE 63 pipe, the pump capacity is max 190 liters per minute.

with a PE 50 pipe at a distance of 50 m, water temperature, e.g. 10 degrees Celsius at a flow of 10,000 L / h (i.e. 10 m3 / h), the speed of water in the pipe is 1.37 m / s, and then the pump delivers 167 L / min.

Thanks for your help, you convinced me that I have to lay the PE 63 pipe.

and this 1.37 is it going to be too much?

for me it will be ... I don't know about my friend

greetings and there is no crisis !!!!! friend said

Gentlemen, however, I would like to continue with the jurka-16 question. Although he sent some theory to him, I still don't know how to calculate the following problem.

I have to calculate what is the gas consumption (m ^ 3 / s) given only certain pressure [bar] and nozzle outlet diameter [mm]. Thank you in advance for your answer.

ie you probably have a pressure difference in front of and behind the nozzle. But it depends not only on the diameter of the nozzle, but also on the shape. You would have to find the parameters of such a nozzle that interest you.

Quote:

ie you probably have a pressure difference in front of and behind the nozzle. But it depends not only on the diameter of the nozzle, but also on the shape. You would have to find the parameters of such a nozzle that interest you.

The problem is that I do not have access to such data (the machine tool catalog does not contain it). I just have only the nozzle outlet diameter, gas supply pressure (oxygen or nitrogen), and process duration. Is it possible to estimate the consumption of these gases on the basis of such reduced data? Do I have to think of the shape of such a nozzle?

just as air resistance depends not only on the area front but also on the resistance coefficient, and the "resistance" of the nozzle depends not only on its diameter.

Nazahin, give everything you have, count and write what is five
best regards

Gentlemen, I will step on the subject, but I mean freely flowing air (several m? / h) through a tunnel with a flap that opens up to a maximum of 90 °. Half the tunnel is open at 45 ° and the flow can be assumed to be halved. What will it look like depending on the direction of the flow? - once it will slide down the flap, another time it will bump into it.
For now, I have figured out that for a tunnel with a cross-section other than a circle, you need to determine the equivalent diameters, and then read the resistances from the table. Only these tables are not visible.