Nomenclature
General Symbols
|
cross-sectional flow area (m2) |
|
nozzle discharge coefficient |
|
specific heat capacity (J/kgoK) |
|
diameter (m) |
|
mass flow rate per unit area (kg/m2s) |
|
gravitational acceleration (9.80665 m/s2) |
|
enthalpy (J/kg) |
|
flow resistance coefficient |
|
fluid level (m) |
|
length-to-diameter ratio for a duct |
|
actual duct length (m) |
|
mass (kg) |
|
fraction of mass remaining above the
break elevation  |
|
 normalized to time of ADS-1 actuation |
|
mass flow rate (kg/s) |
|
non equilibrium flow parameter in Relaxation Length Model |
|
experimental parameter in Henry-Fauske Subcooled Flow Model |
|
pressure (Pa) |
|
entropy (J/kgoK) |
|
temperature (oK) |
|
time (seconds) |
|
velocity (m/s) |
|
specific volume (m3/kg) |
|
volume (m3) |
|
vapor mass fraction (quality) |
|
axial direction (m) |
Greek Symbols
|
vapor void fraction |
|
denotes a differential value (i.e.,  ) |
|
specific heat ratio  |
|
critical duct length required for the development of equilibrium flow determined by Fauske (0.10 m) |
|
dynamic viscosity (kg/ms) |
|
modeled dimensionless group  |
|
 normalized to time of ADS-1 actuation |
|
fluid density (kg/m3) |
|
specific frequency of continuum (s-1) |
Subscripts
|
initial condition (time equals zero) |
|
time of ADS-1 actuation |
|
condition at the break location |
|
critical (choked) flow condition |
|
velocity, temperature and free-energy equilibrium for all phases |
|
exit condition (i.e., break) |
|
Equilibrium Rate Model |
|
saturated liquid property |
|
saturated vapor property value - saturated liquid property value |
|
saturated vapor property |
|
Homogeneous Equilibrium Model |
|
arbitrary fluid phase |
|
fluid mixture property |
|
stagnation condition |
|
Orifice Equation Model |
|
evaluated at a constant pressure |
|
receiver condition |
|
pressurizer condition |
|
Relaxation Length Model |
|
evaluated at a constant entropy |
|
saturation condition |
|
system property or condition |
|
evaluated at a constant temperature |
|
nozzle-throat condition |
|
two-phase fluid mixture |
|
evaluated at a constant volume |
| |
