A modern jet engine has a temperature after combustions of about 1500 K at 32 00 kPa as it enters the turbine section (see state 3, Fig, P4.77). The compressor inlet is at 80 kPa , 260 K (state 1) and the outlet (state 2) is at 3300 kPa , 780 K ; the turbine outlet (state 4) into the nozzle is at 4 00 kPa , 9 00 K and the nozzle exit (state 5) is at 8 0 kPa, 64 0 K Neglect any heat transfer and neglect kinetic energy except out of the nozzle. Find the compressor and turbine specific work terms and the nozzle exit velocity.
A modern jet engine has a temperature after combustions of about 1500 K at 32 00 kPa as it enters the turbine section (see state 3, Fig, P4.77). The compressor inlet is at 80 kPa , 260 K (state 1) and the outlet (state 2) is at 3300 kPa , 780 K ; the turbine outlet (state 4) into the nozzle is at 4 00 kPa , 9 00 K and the nozzle exit (state 5) is at 8 0 kPa, 64 0 K Neglect any heat transfer and neglect kinetic energy except out of the nozzle. Find the compressor and turbine specific work terms and the nozzle exit velocity.
A modern jet engine has a temperature after combustions of about
1500
K
at
32
00
kPa
as it enters the turbine section (see state 3, Fig, P4.77). The compressor inlet is at
80
kPa
,
260
K
(state 1) and the outlet (state 2) is at
3300
kPa
,
780
K
; the turbine outlet (state 4) into the nozzle is at
4
00
kPa
,
9
00
K
and the nozzle exit (state 5) is at
8
0
kPa, 64
0
K
Neglect any heat transfer and neglect kinetic energy except out of the nozzle. Find the compressor and turbine specific work terms and the nozzle exit velocity.
2. If 0.17 kg/s of air are compressed isothermally from Pi = 96 kPaa and V, = 0.13
m/s to p2 = 620 kPaa, find the work, the change of entropy, and heat for: a) a
nonflow process, and b) a steady flow process with V1 = 15 m/s and V2 = 60
%3D
%3D
m/s.
The power of a steam turbine in a thermal power plant is 60 MW. Water vapor enters the turbine at 3MPa pressure, 4000C temperature and 50 m / s speed, 10 kPa pressure, 0.9 dry degree and 200 m / s speed leaves the turbine. Considering the turbine as adiabatic;
1-Find the mass flow of steam
2-Find the turbine outlet cross-sectional area, its ratio (A2 / A1) to the inlet cross-sectional area.
An ideal gas with a mass of 2 kg reversibly and polytropically expands up to 3 times its initial volume in a piston-cylinder assembly. The temperature of the ideal gas drops from 300 ° C to 60 ° C.
a) Find the value k, which is the ratio of specific heats.
b) If the heat energy input is 20 kJ, the boundary work output is 100 kJ and the entropy generation is 0.36 kJ / K, calculate the thermal energy source temperature as [° C].
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