Flow-X─ Function Reference
4-63
Flow-X General functions - fxAGA3_C
Pressure correction
The relation between the pressure at the upstream tapping p
1
and the pressure at the
downstream tapping (p
2
) is as following:
1000
1
2
units
K
p
p
p
The relation between the pressure at the upstream tapping and the downstream tapping is
as following:
LOSS
p
p
p
1
3
units
LOSS
K
p
p
2
2
1
1
4
1
1
E
E
C
Where:
p
1
Pressure at upstream tapping
psia
p
2
Pressure at downstream tapping
psia
p
3
Fully recovered downstream pressure
psia
p
Differential pressure
inH20 @
60°F
p
LOSS
Pressure loss over the meter
psi
C
Discharge coefficient as calculated by the standard
-
α
Flow coefficient
-
β
Diameter ratio at the upstream pressure and temperature
-
E
Velocity of approach factor
-
K
units
Unit conversion factor to convert a value expressed in 'inH2O @60°F' to the
corresponding expressed in 'psi' (conversion as specified in section 'Unit
Types')
-
Temperature correction
When input 'Temperature correction' is set to 1, then an isentropic expansion based on the
isentropic coefficient is applied:
67
.
459
67
.
459
1
1
2
2
1
p
p
t
t
Summary of Contents for flow-x
Page 1: ...Function Reference Certified flow calculations Flow and batch calculations Worksheet functions...
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