Page 121 - DJJ20063- Thermodynamics 1
P. 121
DJJ20063- Thermodynamics 1
Consider a mass of m kg/s flowing through a system in which all conditions are steady as
illustrated in Fig.3.2.5-1.
Figure 3.2.7-1 Mass flowing through a system
2
Let A1 and A2 represent the flow areas in m at the inlet and outlet respectively.
3
Let v1 and v2 represent the specific volumes in m /kg at the inlet and outlet
respectively.
Let C1 and C2 represent the velocities in m/s, at the inlet and outlet respectively.
3
Then mass flowing per sec = volume flowing per sec m /s
3
volume per kg m /kg
A C kg
= 1 1 at inlet
v 1 s
A C kg
= 2 2 at outlet
v 2 s
A C A C
i.e. m = 1 1 = 2 2 (3.24)
v 1 v 2
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