Homework 1: In an axial flow compressor air enters the compressor at stagnation pressure and temperature of 1 bar and 292K, respectively. The pressure ratio of the compressor is 9.5. If isentropic efficiency of the compressor is 0.85, find the work of compression and the final temperature at the outlet. Assume y=1.4, and Cp = 1.005 kJ/kg K.
Homework 1: In an axial flow compressor air enters the compressor at stagnation pressure and temperature of 1 bar and 292K, respectively. The pressure ratio of the compressor is 9.5. If isentropic efficiency of the compressor is 0.85, find the work of compression and the final temperature at the outlet. Assume y=1.4, and Cp = 1.005 kJ/kg K.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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Transcribed Image Text:Homework 1: In an axial flow compressor air enters the compressor at stagnation pressure
and temperature of 1 bar and 292K, respectively. The pressure ratio of the compressor is 9.5.
If isentropic efficiency of the compressor is 0.85, find the work of compression and the final
temperature at the outlet. Assume y=1.4, and Cp = 1.005 kJ/kg K.
Homework 2: In one stage of an axial flow compressor, the pressure ratio is to be 1.22 and
the air inlet stagnation temperature is 288K. If the stagnation temperature rise of the stages is
21K, the rotor tip speed is 200 m/s, and the rotor rotates at 4500 rpm, calculate the stage
efficiency and diameter of the rotor.
Homework 3 : An axial flow compressor has a tip diameter of 0.95m and a hub diameter of
0.85 m. The absolute velocity of air makes an angle of 28° measured from the axial direction
and relative velocity angle is 568. The absolute velocity outlet angle is 568 and the relative
velocity outlet angle is 288. The rotor rotates at 5000 rpm and the density of air is 1.2 kg/m3.
Determine:
1. The axial velocity.
2. The mass flow rate.
3. The power required.
4. The flow angles at the hub.
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