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发表于 2010-6-21 23:41:30
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来自： 美国
你问的太含混：
W. |6 W: L3 k4 w% [
7 i7 K. l5 r W A! _1。 若是水， 则应该参考：
) N' Z4 T3 _4 z1 u! [7 L4 A2 ^5 q8 o' q3 L4 }
If the gas whose flow is computed includes steam, COSMOSFloWorks can predict an
7 B5 l3 A5 C; i2 l- R Bequilibrium volume condensation of water from this steam (without any surface ( \* S" a1 E% o. o/ p7 g
condensation) taking into account the corresponding changes of the steam’s temperature,
0 t7 J" O! F7 M- t# Odensity, enthalpy, specific heat, and sonic velocity. In accordance with the equilibrium
! K0 l& q9 C4 F/ r5 Mapproach, the condensed water’s local mass fraction in the local total mass of the steam : p( W: ]" r1 X& h
and the condensed water is determined from the fluid’s local temperature, pressure, and, if 7 |, w4 O5 B" a. |6 E
a multi-component fluid is considered, the steam’s local mass fraction. Since this ]& o, [1 m0 x
condensation model is at equilibrium, the condensation has no history, i.e. it is a local fluid
- x* @' o* e" w, C! cproperty only.
+ i8 F7 t* P* } `' ^& z# `& xIn addition, it is assumed that
: y8 q0 _+ X( M• the condensed water’s volume is equal to zero, so this prediction is correct only if
3 Z% G5 p, \ `the condensed water’s relative volume does not exceed 5%,
6 i; e% {3 B4 |) `8 |• the steam’s temperature lie in the range of 283...610 K and the pressure does not 0 M( s$ ~0 q3 j
exceed 10 MPa. |
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