Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Air flows through a cylindrical combustion chamber of diameter 0.3 m and length 3 m as
shown in the figure below.
M₁
T₁
P₁
1
L
2
M₂
T₂
P₂
Stations (1) and (2) are the inlet and outlet, respectively. The inlet stagnation temperature is
1,000 K and the inlet stagnation pressure is 1.5 MPa.
=
a) If the skin friction coefficient is Cf 0.004 (approximately uniform) and no combustion
takes place, what will be the inlet Mach number if it is subsonic and the exit Mach
number is unity? What are the values of static and stagnation pressure at the exit?
b) If combustion takes place and the heat of reaction is 600 kJ/kg of mixture, neglecting
frictional effects, and if the inlet Mach number is 0.25, what is the exit Mach number?
What are the values of static and stagnation pressure at the exit?
The combustion process may be simulated by simple heating with constant specific heat
ratio. The fluid may be considered a perfect gas with y = = 1.4 and a molecular weight of
29 kg/kmol.
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Transcribed Image Text:Air flows through a cylindrical combustion chamber of diameter 0.3 m and length 3 m as shown in the figure below. M₁ T₁ P₁ 1 L 2 M₂ T₂ P₂ Stations (1) and (2) are the inlet and outlet, respectively. The inlet stagnation temperature is 1,000 K and the inlet stagnation pressure is 1.5 MPa. = a) If the skin friction coefficient is Cf 0.004 (approximately uniform) and no combustion takes place, what will be the inlet Mach number if it is subsonic and the exit Mach number is unity? What are the values of static and stagnation pressure at the exit? b) If combustion takes place and the heat of reaction is 600 kJ/kg of mixture, neglecting frictional effects, and if the inlet Mach number is 0.25, what is the exit Mach number? What are the values of static and stagnation pressure at the exit? The combustion process may be simulated by simple heating with constant specific heat ratio. The fluid may be considered a perfect gas with y = = 1.4 and a molecular weight of 29 kg/kmol.
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