## Search found 371 matches

Sat Jun 15, 2013 9:39 pm
Forum: Flow calculators and fluid flow problems
Topic: Water Turbine Calculations
Replies: 3
Views: 9705

### Re: Water Turbine Calculations

Actual flow rate you can calculate based on the height difference and pipe diameter that you have. You can't tell at the start that you will have 100 l/s. That you can calculate. Here is report from calculation using pressure drop calculator: Pipe pressure drop calculator 1. volume flow rate (q): q ...
Thu Jun 13, 2013 9:03 pm
Forum: Flow calculators and fluid flow problems
Topic: air pressure drop calculation misleading
Replies: 1
Views: 3383

### Re: air pressure drop calculation misleading

Hi Adam, As you can see in calculator flow rate has symbol of - qn and it is for normal conditions (p=101325 Pa, T=0) so density is also at that condition. I can also add option to enter flow at p1 or p2 but I think it is not very convenient way for calculation - I think much more often you will not...
Mon May 20, 2013 1:29 pm
Forum: Flow calculators and fluid flow problems
Topic: Natural Gas Pipeline Commisioning Calculations Problem
Replies: 2
Views: 8547

### Re: Natural Gas Pipeline Commisioning Calculations Problem

For me it makes no sense also.
Where did you get purge rate of 0.00311 min/meter?
Mon May 20, 2013 1:15 pm
Forum: Flow calculators and fluid flow problems
Topic: Reynolds number calculator for Android phones
Replies: 1
Views: 3260

### Reynolds number calculator for Android phones

Reynolds number calculator is from now available for Android smart phones. Calculator is created on the basis of well established Reynolds number calculator for desktop users. It is designed for simple and quick calculation of Reynolds number based on known diameter, flow stream velocity (volume or ...
Fri Apr 19, 2013 7:42 am
Forum: Flow calculators and fluid flow problems
Topic: Depth of water in a 10 inch pipe
Replies: 1
Views: 3210

### Re: Depth of water in a 10 inch pipe

What is flow rate?
Is pipe filled with water or is it filled just for some level?
Fri Apr 19, 2013 7:34 am
Forum: Flow calculators and fluid flow problems
Topic: K Factor Calculator for fittings
Replies: 7
Views: 9211

### Re: K Factor Calculator for fittings

It depends on velocity that you use with K value. If you calculate minor loss as Dp = K rho * v^2 / 2 and use velocity on D1 than you should use K1, and for D2 - K2.
Sun Apr 07, 2013 9:24 am
Forum: Flow calculators and fluid flow problems
Topic: CYLINDER LEAK DOWN TESTER
Replies: 13
Views: 15478

### 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: 15478

### 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: 15478

### 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: 15478

### 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...