Search found 375 matches

by admin
Thu Aug 19, 2010 7:15 am
Forum: Flow calculators and fluid flow problems
Topic: Chilled Water Pipe Header Size Calculation
Replies: 1
Views: 17683

Re: Chilled Water Pipe Header Size Calculation

You can use flow rate and diameter calculator at:
http://www.pipeflowcalculations.com/flowrate/index.htm
where if you enter water velocity of 2 m/s and density of 1000 kg/m3 you can get pipe diameter.
by admin
Tue Aug 17, 2010 9:40 pm
Forum: Flow calculators and fluid flow problems
Topic: SEAWATER PIPES TRASPORT
Replies: 1
Views: 4522

Re: SEAWATER PIPES TRASPORT

I think that you can solve it easily with calculator at: http://www.pipeflowcalculations.com/pressuredrop/index.htm There you enter flow rate 2500 l/s and other inputs except pressure drop. Changing pipe diameter and calculating you will have different values for pressure drop. Once you get 1000 mmW...
by admin
Tue Aug 17, 2010 6:52 am
Forum: Flow calculators and fluid flow problems
Topic: Converting pressure loss from Pipe Pressure Test ...
Replies: 1
Views: 3545

Re: Converting pressure loss from Pipe Pressure Test ...

For your values I get velocity of 1.7 m/s which is ok for water, and it would be ok also if you are in the range of 2 m/s velocity.
More important is that the 4 psi pressure drop does not create cavitation and that there is sufficient pressure for the end user.
by admin
Thu Aug 12, 2010 2:23 pm
Forum: Flow calculators and fluid flow problems
Topic: Gas Flow through VERY small pipe
Replies: 11
Views: 15759

Re: Gas Flow through VERY small pipe

downybear wrote: MD: In nozzle which I have in my hand right now D1 is 4 mm, D2 is 2 mm. Output to intake is 4 mm as well.
Input looks like on your image.
So you have another nozzle like one my image but in mirror on output? Diameters changes from 4 - 2 - 4 mm?
by admin
Thu Aug 12, 2010 12:21 pm
Forum: Flow calculators and fluid flow problems
Topic: Gas Flow through VERY small pipe
Replies: 11
Views: 15759

Re: Gas Flow through VERY small pipe

Here is the model that might give us results - it is the outlet nozzle: image - injector 2.jpg Now, pressure at pos. 1 is the pressure measured by "pressure sensor" and pressure at pos. 2 is the pressure on the "pressure sensor intake" - right? Diameter at pos. 1 and 2. are neede...
by admin
Thu Aug 12, 2010 9:00 am
Forum: Flow calculators and fluid flow problems
Topic: Gas Flow through VERY small pipe
Replies: 11
Views: 15759

Re: Gas Flow through VERY small pipe

Can you tell me if the scheme on the top is good representation of the problem?
by admin
Thu Aug 12, 2010 8:59 am
Forum: Flow calculators and fluid flow problems
Topic: Gas Flow through VERY small pipe
Replies: 11
Views: 15759

Re: Gas Flow through VERY small pipe

To be able to upload you have to put it in .jpeg or similar.
Here are images with my scheme for the problem.
by admin
Thu Aug 12, 2010 7:47 am
Forum: Flow calculators and fluid flow problems
Topic: Flow rates in oil pipes
Replies: 4
Views: 23365

Re: Flow rates in oil pipes

For laminar flow (Re<2300) flow rate will change with 4 power of diameter Q/Q1 = (D/D1)^4 For turbulent flow where friction factor is not depending on the Reynolds number flow rate will change with 2.5 power of diameter Q/Q1 = (D/D1)^2.5 Anyway, you can try with calculator at: http://www.pipeflowcal...
by admin
Wed Aug 11, 2010 11:03 am
Forum: Flow calculators and fluid flow problems
Topic: Gas Flow through VERY small pipe
Replies: 11
Views: 15759

Re: Gas Flow through VERY small pipe

Can you draw some image about your injector?
by admin
Wed Aug 11, 2010 7:23 am
Forum: Flow calculators and fluid flow problems
Topic: Gas Flow through VERY small pipe
Replies: 11
Views: 15759

Re: Gas Flow through VERY small pipe

Some picture will tell more ... Regarding the pipe sizes,... All calculations in "basic" fluid dynamics are based on the assumption that fluid is continuous, which is actually not true, but if the diameter is big enough than you are OK. Big enough means that diameter is bigger than the fre...