|
|
发表于 2010-6-21 23:41:30
|
显示全部楼层
来自： 美国
你问的太含混：
3 B, _, q: ^: j' J' Q" h9 d0 Y0 \8 K! _/ Y3 E8 `
1。 若是水， 则应该参考：, i. v- F# W3 S! M
' C) \. s: k# e: ]8 y2 f/ fIf the gas whose flow is computed includes steam, COSMOSFloWorks can predict an
" c+ L. ~- a( _7 E* |/ vequilibrium volume condensation of water from this steam (without any surface
, L" Q7 l4 W, econdensation) taking into account the corresponding changes of the steam’s temperature, # L. H {8 E7 m% c/ T1 t* ~
density, enthalpy, specific heat, and sonic velocity. In accordance with the equilibrium ( N, s! W) f( ~2 [% v& P9 i
approach, the condensed water’s local mass fraction in the local total mass of the steam , F" |# h) R* E+ {5 m5 U+ \
and the condensed water is determined from the fluid’s local temperature, pressure, and, if
) R, T! B# `1 X! w! O5 m) Fa multi-component fluid is considered, the steam’s local mass fraction. Since this
' F6 |7 }6 U1 wcondensation model is at equilibrium, the condensation has no history, i.e. it is a local fluid " T' g: O3 o0 `0 o
property only.
# \% {/ r+ B# RIn addition, it is assumed that
9 n9 h+ _. p* g• the condensed water’s volume is equal to zero, so this prediction is correct only if
j, i* g& a" Fthe condensed water’s relative volume does not exceed 5%,) Z$ Y+ k( _2 x+ F
• the steam’s temperature lie in the range of 283...610 K and the pressure does not
# a5 z1 E3 W8 S& \exceed 10 MPa. |
|
楼主