Week 9 - Parametric study on Gate valve.
Parametric study
20MM Mesh
10
Disc position
Pressure contour
Velocity contour
20
Pressure contour
Velocity contour
30
Pressure contour
Velocity contour
40
Pressure contour
Velocity contour
50
Pressure contour
Velocity contour
60
Pressure contour
Velocity contour
70
Pressure contour
Velocity contour
80
Pressure contour
Velocity contour
Q – Flow rate
SG- Specific Gravity
- Pressure drop
|
Lift of disc |
Mass flow rate (kg /sec) |
Flow rate m3 / kg |
Flow rate in Gallon |
Pressure drop |
CV |
|
10 |
0.23800585 |
0.85682106 |
3.77247174 |
0.001380394 |
101.5370253 |
|
20 |
0.36035372 |
1.297273392 |
5.711726099 |
0.001288463 |
159.1224004 |
|
30 |
0.46725997 |
1.682135892 |
7.406225655 |
0.001181698 |
215.4485614 |
|
40 |
0.55514387 |
1.998517932 |
8.799214647 |
0.001058608 |
270.4433644 |
|
50 |
0.61783879 |
2.224219644 |
9.792949944 |
0.000976024 |
313.4608193 |
|
60 |
0.71241108 |
2.564679888 |
11.29195214 |
0.000820275 |
394.2658563 |
|
70 |
0.76679523 |
2.760462828 |
12.15395897 |
0.000721262 |
452.5548964 |
|
80 |
0.8252434 |
2.97087624 |
13.08038187 |
0.000603433 |
532.4832676 |
|
|
|
|
|
|
|
|
Lift of disc |
Mass flow rate (kg /sec) |
Flow rate m3 / kg |
Pressure drop |
KV |
|
10 |
0.23800585 |
0.85682106 |
9.51747E-05 |
87.82728845 |
|
20 |
0.36035372 |
1.297273392 |
8.88363E-05 |
137.6373683 |
|
30 |
0.46725997 |
1.682135892 |
8.14751E-05 |
186.3582558 |
|
40 |
0.55514387 |
1.998517932 |
7.29883E-05 |
233.927548 |
|
50 |
0.61783879 |
2.224219644 |
6.72944E-05 |
271.1366981 |
|
60 |
0.71241108 |
2.564679888 |
5.65559E-05 |
341.0312738 |
|
70 |
0.76679523 |
2.760462828 |
4.97292E-05 |
391.4500084 |
|
80 |
0.8252434 |
2.97087624 |
4.16052E-05 |
460.5862874 |
Flow Coffcient –
The flow coefficient of a device is a relative measure of its efficiency at allowing fluid flow. It describes the relationship between the pressure drop across an orifice valve or other assembly and the corresponding flow rate.
Q is the rate of flow (expressed in US gallons per minute),
SG is the specific gravity of the fluid (for water = 1),
ΔP is the pressure drop across the valve (expressed in psi).
The metric equivalent flow factor (Kv) is calculated using metric units :