Search found 375 matches
- Sun Apr 07, 2013 9:24 am
- Forum: Flow calculators and fluid flow problems
- Topic: CYLINDER LEAK DOWN TESTER
- Replies: 13
- Views: 23952
Re: CYLINDER LEAK DOWN TESTER
Pressure is dropping not only due to change in pipe diameter but also due to local reistance losses in restriction and friction in pipe. In Bernolli equation flow is considered with no energy loss, but in real system it is not the case. Because of that you must add parts of equation that takes care ...
- Sat Apr 06, 2013 9:57 pm
- Forum: Flow calculators and fluid flow problems
- Topic: CYLINDER LEAK DOWN TESTER
- Replies: 13
- Views: 23952
Re: CYLINDER LEAK DOWN TESTER
Air in pressurized cylinder is heated due to compression, but while going through restriction it is cooled due to sudden drop in pressure.
- Sat Apr 06, 2013 3:17 pm
- Forum: Flow calculators and fluid flow problems
- Topic: CYLINDER LEAK DOWN TESTER
- Replies: 13
- Views: 23952
Re: CYLINDER LEAK DOWN TESTER
On the other hand I don't know how did you get K=10000? It is well known that for pipe entrance K=0.5 and for pipe exit K=1.0 for pipes with sharp edges. As the pipe length is very small, flow can be considered as adiabatic as there is not enough time to exchange heat with surroundings. That high sp...
- Fri Apr 05, 2013 8:28 pm
- Forum: Flow calculators and fluid flow problems
- Topic: CYLINDER LEAK DOWN TESTER
- Replies: 13
- Views: 23952
Re: CYLINDER LEAK DOWN TESTER
what you are measuring is actualy pressure difference in front and after 1 mm orifice - am I right? So with discharge calculator you can calculate how much air is flowing through discharge orifice. I here show my results for 5 bar pressure drop over 1 mm pipe with 6 mm length and K = 1.5 for entranc...
- Tue Apr 02, 2013 6:48 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Vacuum Relief Valve Sizing
- Replies: 2
- Views: 9107
Re: Vacuum Relief Valve Sizing
You must know how "quickly" it is in order to calculate flow rate of air required and pipe diameter needed for it. When you know time t that is needed to drop temperate from one point to another you can calculate how much volume ( V ) is changing in that time and from there you have flow r...
- Sat Mar 30, 2013 2:28 am
- Forum: Flow calculators and fluid flow problems
- Topic: velocity to pressure??
- Replies: 4
- Views: 8666
Re: velocity to pressure??
+ ((ρv^2)/2) due to pipe exit. Correct formula it is!dan-g wrote: ΔP=f(L/D)((ρv^2)/2)
- Fri Mar 29, 2013 9:54 pm
- Forum: Flow calculators and fluid flow problems
- Topic: velocity to pressure??
- Replies: 4
- Views: 8666
Re: velocity to pressure??
How is you system looking? Do you have one point where two pipes start and air exits to atmosphere? If so than you have two parallel lines with same pressure drop (pressure change) from the start to the finish and for that equal pressure difference two flow rates are established - which you can use ...
- Fri Mar 29, 2013 9:50 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Flow rate through an orfice plate
- Replies: 1
- Views: 5293
Re: Flow rate through an orfice plate
You are right.
you can try also orifice free calculator
you can try also orifice free calculator
- Thu Mar 28, 2013 8:45 am
- Forum: Flow calculators and fluid flow problems
- Topic: Help Please: Viscous Oil Flow Rate
- Replies: 5
- Views: 15085
Re: Help Please: Viscous Oil Flow Rate
I see... That is non statinary flow as you have pressure change over time so none of calculators availble on pipeflowcalculations.com is covering that problem. But in the near future it would be good to do one as many asks for tool that will solve similar problem. The problem is also that fluids tha...
- Mon Mar 25, 2013 8:30 pm
- Forum: Flow calculators and fluid flow problems
- Topic: CYLINDER LEAK DOWN TESTER
- Replies: 13
- Views: 23952
Re: CYLINDER LEAK DOWN TESTER
Thank you for your data, but I suggested you to use GAS DISCHARGE CALCULATOR and not isothermal just to check from the other point of view.
Your experience with tester for sure will be of interest for others as well as for me also.
Your experience with tester for sure will be of interest for others as well as for me also.