Spirit flow-x, Справочник по функциям

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4-60
Flow-X─ Function Reference
Flow-X General functions - fxAGA3_C
Pressure
Location 1: Upstream tapping
Input 'Pressure' represents the
pressure at the upstream
pressure tapping (p
1
).
Since the absolute pressure is
usually measured at the
upstream tapping this is the
most common setting.
2: Downstream tapping
Input 'Pressure' represents the
pressure at the downstream
tapping (p
2
).
- PRESL
OC 1
Temperature
Location 1: Upstream tapping
Input 'Temperature' represents
the upstream temperature (t
1
).
2: Downstream tapping
Input 'Temperature represents
the temperature at the
downstream tapping (t
2
).
3: Recovered pressure
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.
- TEMP
LOC 3
Temperature
Correction
1: Use (1-

)/

Isentropic expansion using (1-

)/

as the temperature
referral exponent
2: Use temperature exponent
Isentropic expansion using
input 'Temperature Exponent'
as the temperature referral
exponent [-]
- TEMP
COR 1
Temperature
Exponent To correct the temperature from
down- to upstream conditions (or
vice versa) the formula (

-1)/

(isentropic expansion) will be used
when the input value is set to 0,
else the input value will be used.
For more details refer to section
'Temperature correction'.
TEMP
EXP 0