Question

In: Chemistry

Consider an air-standard cycle for the turbojet power plant shown in Fig. 8.13.

Consider an air-standard cycle for the turbojet power plant shown in Fig. 8.13. The temperature and pressure of the air entering the compressor are 1 bar and 30℃. The pressure ratio in the compressor is 6.5, and the temperature at the turbine inlet is 1100℃, if expansion in the nozzle is isentropic and if the nozzle exhausts at I bar, what is the pressure at the nozzle inlet (turbine exhaust) and what is the velocity of the air leaving the nozzle?

Consider an air-standard cycle for the turbojet power plant shown

Solutions

Expert Solution

 

Figure shows the air-standard turbojet power plant on a PV diagram.

TA := 303.15∙K

TC := 1373.15∙K

 

 

Where cr is the compression ratio and er is the expansion ratio. Since the two work terms are equal but of opposite signs,

cr : = 6.5 er : = 0.5 (guess)

 

Given

 

 

This may be written:

 

 

We note the following

 

The following substitutions are made in (A):

 

Then

 

 

 

 

Raffay answered 2 years ago
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