Search found 375 matches
- Sun Aug 08, 2010 9:27 am
- Forum: Flow calculators and fluid flow problems
- Topic: Gas Flow In Small Pipe
- Replies: 3
- Views: 5575
Re: Gas Flow In Small Pipe
I still don't have calculator for this kind of problem but you can read theory at: Discharge through valves, fittings and pipes http://www.pipeflowcalculations.com/pipeflowtheory/discharge_through_valves_fittings_and_pipes.htm and for expansion factor Y please find formula for orifices at: Flow thro...
- Fri Aug 06, 2010 9:01 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Gas Flow In Small Pipe
- Replies: 3
- Views: 5575
Re: Gas Flow In Small Pipe
You must tell me the pressure difference from start to finish to calculate flow rate.
I think that 8 bar is on the start, and what do you have on the end - a tank or atmosphere or cylinder?
I think that 8 bar is on the start, and what do you have on the end - a tank or atmosphere or cylinder?
- Fri Aug 06, 2010 7:27 pm
- Forum: Flow calculators and fluid flow problems
- Topic: FLOWRATE CALCULATIONS
- Replies: 1
- Views: 3582
Re: FLOWRATE CALCULATIONS
Here you have simple pressure drop calculator and it can be used to calculate water flow rate as well:
http://www.pipeflowcalculations.com/pre ... /index.htm
http://www.pipeflowcalculations.com/pre ... /index.htm
- Fri Aug 06, 2010 7:25 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Car Exhaust Diameter Flow Question
- Replies: 3
- Views: 11141
Re: Car Exhaust Diameter Flow Question
My opinion is the best solution is to have no car exhaust pipe at all if you want highest power :) Now as this is not a option, than you are trying to get close to it - which is pipe should be as big as possible, but, Flow through car exhaust is by no means stationary - it is oscillating with time v...
- Thu Aug 05, 2010 2:35 pm
- Forum: Flow calculators and fluid flow problems
- Topic: P in pipe that goes up 18' then back down...
- Replies: 4
- Views: 6815
Re: P in pipe that goes up 18' then back down...
Yes, you are right on both...
- Thu Aug 05, 2010 7:46 am
- Forum: Flow calculators and fluid flow problems
- Topic: P in pipe that goes up 18' then back down...
- Replies: 4
- Views: 6815
Re: P in pipe that goes up 18' then back down...
For that height the pressure will be above evaporation point for the normal temperatures (20-30 OC). In order to start the circulation energy (head) on one side must be higher than energy (head) on the other. It can be achieved with pump or with level difference between two tanks. In the second case...
- Thu Aug 05, 2010 7:34 am
- Forum: Flow calculators and fluid flow problems
- Topic: losses thru a valve
- Replies: 3
- Views: 5960
Re: losses thru a valve
This problems in my opinion can be solved only by experiment.
Calculation is maybe possible but with very limited accuracy.
Maybe using numerical methods some better results can be obtained but again, some experiment is also required - that is what I think.
Calculation is maybe possible but with very limited accuracy.
Maybe using numerical methods some better results can be obtained but again, some experiment is also required - that is what I think.
- Tue Aug 03, 2010 7:28 am
- Forum: Flow calculators and fluid flow problems
- Topic: losses thru a valve
- Replies: 3
- Views: 5960
Re: losses thru a valve
The calculator for air pressure drop http://www.pipeflowcalculations.com/airflow/index.htm can be used with value of resistance coefficient - K entered. Value for K can be obtained from the valve manufacturer or found in literature. If you can tell me more about the valve - type of valve (globe, gat...
- Mon Aug 02, 2010 10:00 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Venturi Expansion Factor and Discharge Coefficient
- Replies: 6
- Views: 11490
Re: Venturi Expansion Factor and Discharge Coefficient
As fluid is considered as incompressible no expansion factor is included in calculator, for this time but will be soon.
For the second point you are right of course and it will be indicated more clearly. Thank you for your analysis.
For the second point you are right of course and it will be indicated more clearly. Thank you for your analysis.
- Mon Aug 02, 2010 7:49 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Venturi Expansion Factor and Discharge Coefficient
- Replies: 6
- Views: 11490
Re: Venturi Expansion Factor and Discharge Coefficient
And just to point out following: I have two questions that I would appreciate if any one help me to find their answers. let's start. The discharge coefficient used for venturi in the calculator is: Cd=a+b.(Ln Re)^2+c.(Ln Re)^3 and apparently the expansion factor used for it, is: Buckingham Eq: Y=1-(...