Panametrics PanaFlow MV80, Руководство пользователя, Страница: 169 / 184

PanaFlow™ MV80, MV82 & MV84 User’s Manual 157
Appendix C. Flow Meter Calculations
Appendix C. Flow Meter Calculations
C.1 In-Line Flow Meter Calculations
C.1.1 Volume Flow Rate
Qv
f
K
---
=
C.1.2 Mass Flow Rate
Q
M
Q
V

=
C.1.3 Flowing Velocity
V
f
Q
V
A
-----
=
Where:

A
= Cross sectional area of the pipe (ft
2
)

f
= Vortex shedding frequency (pulses/sec)

K
= Meter factor corrected for thermal expansion (pulses/ft
3
)

Q
M
= Mass flow rate (lbm/sec)

Q
V
= Volume flow rate (ft
3
/sec)

V
f
= Flowing velocity (ft/sec)


= Density (lbm/ft
3
)