29
1.6 Energy Analysis of Turbomachines
So
or
The kinetic energy and the potential energy available at the rotor outlet are used to
produce pressure decrease behind the rotor and to increase in this way the pressure
difference over the rotor.
The resulting three work equations are:
2
a
2
2
3
2
irr 23
p
p
v
0
g( z z ) q
0.
2
r
−
− +
+
−
+
=
2
a
2
2
2
3
irr 23
p
p
v
g( z z )
q
.
2
r
−
+
−
=
+
2
1
a
1
0
1
irr01
p p
v
g( z z )
q
,
2
r
−
−
=
+
+
Fig. 1.11 Velocity triangles at R = 0 (w 1 = w 2 ) and R = 0.5 (w 2 = v 1 ; v 2 = w 1 ) in steam turbines
Fig. 1.10 Force by action (w 1 = w 2 ) and reaction (Dw > 0)
1.6 Energy Analysis of Turbomachines
So
or
The kinetic energy and the potential energy available at the rotor outlet are used to
produce pressure decrease behind the rotor and to increase in this way the pressure
difference over the rotor.
The resulting three work equations are:
2
a
2
2
3
2
irr 23
p
p
v
0
g( z z ) q
0.
2
r
−
− +
+
−
+
=
2
a
2
2
2
3
irr 23
p
p
v
g( z z )
q
.
2
r
−
+
−
=
+
2
1
a
1
0
1
irr01
p p
v
g( z z )
q
,
2
r
−
−
=
+
+
Fig. 1.11 Velocity triangles at R = 0 (w 1 = w 2 ) and R = 0.5 (w 2 = v 1 ; v 2 = w 1 ) in steam turbines
Fig. 1.10 Force by action (w 1 = w 2 ) and reaction (Dw > 0)