Spirit flow-x, Справочник по функциям

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Flow-X─ Function Reference
4-217
Flow-X General functions - fxISO5167_ISA1932Nozzle
pressure at the downstream tapping
(p
2
).
Temperature
Location 1: Upstream
Input 'Temperature' represents the
upstream temperature (t
1
).
2: Downstream
Input 'Temperature represents the
temperature at the downstream
tapping (t
2
).
3: Recovered
Input 'Temperature' represents the
downstream temperature at a
location Where the pressure has
fully recovered (t
3
).
Since temperature measurement is
usually downstream of the flow
device this is the most common
setting.
- 2
Temperature
Correction This parameter specifies how the
temperature should be corrected from
downstream to upstream conditions (or
vice versa)
1: (1-

)/

Isentropic expansion using (1-

)/

as
the temperature referral exponent
2: Constant
Isentropic expansion using input
'Temperature Exponent' as the
temperature referral exponent [-].
Please note that this value must be <
0
3: Joule Thomson
Isenthalpic expansion using input
'Temperature Exponent' as the Joule
Thomson coefficient [°C/bar].
This method is prescribed by
ISO5167-1:2003.
3
Temperature
Exponent Refer to input Temperature Correction
Unit depends on input Temperature
Correction value -
-
°C/bar 0
Density Location This parameter specifies if and how the
density should be corrected from
downstream to upstream conditions (or
vice versa).
1: Upstream
Input 'Density' represents the
density at the upstream pressure
tapping (

1
).
2: Downstream
Input 'Density' represents the
density at the downstream tapping
(

2
).
3: Recovered
Input 'Density' represents the
density downstream at a location
Where the pressure has fully
recovered (

3
).
- 1
Density Exponent. This factor is used when density correction
is enabled. The formula 1/

will be used
- 0