Question
In: Mechanical Engineering
Air enters a constant diameter pipe at a pressure of 200 kPa. At the exit of...
Air enters a constant diameter pipe at a pressure of 200 kPa. At the exit of the pipe the pressure is 120 kPa, the Mach number is 0.75, and the stagnation temperature is 330°C. Determine the inlet Mach number and the heat transfer per unit mass of air.
Solutions
samet mamat answered 2 years agoRelated Solutions
An adiabatic air compressor with inlet conditions of 100 kPa, 27 C and an exit pressure...
An adiabatic air compressor with inlet conditions of 100 kPa, 27
C and an exit pressure of 500 kPa has an inlet volume flow rate of
5 m3/s and operates in steady flow. Calculate the minimum power
required to drive the compressor.
Air is compressed from an inlet condition of 100 kPa, 300 K to an exit pressure...
Air is compressed from an inlet condition of 100 kPa, 300 K to
an exit pressure of 1000 kPa by an internally reversible
compressor. Determine the compressor power per unit mass flow rate
if the device is
(a) isentropic,
(b) polytropic with n =1.3,
(c) isothermal.
Air is compressed from an inlet condition of 100 kPa, 300 K to an exit pressure...
Air is compressed from an inlet condition of 100 kPa, 300 K to
an exit pressure of 1000 kPa by an internally reversible
compressor. Determine the compressor power per unit mass flow rate
if the device is
(a) isentropic,
(b) polytropic with n =1.3,
(c) isothermal.
air at 110 kpa and 25 degrees C enters a diffuser with diameter of 10 cm...
air at 110 kpa and 25 degrees C enters a diffuser with
diameter of 10 cm and 25 cm at entrance and exit. if the velocity
of air at the entrance is 15 m/s and leaving the diffuser at 1.5
m/s. determine a.) mass rate of air b.) density of air at the
exit
Atmospheric air, at constant conditions, 102 kPa pressure and 30 ° C to a air conditioning...
Atmospheric air, at constant conditions, 102 kPa pressure and
30 ° C to a air conditioning system
enters at 60% relative humidity at temperature. The volumetric
flow of atmospheric air is 100 L / s. Air,
It is separated from the air conditioning system at a pressure
of 95 kPa and a temperature of 15 ° C at 100% relative
humidity.
In this process, the temperature of the condensing water is 15
° C. This air conditioning
Calculate the heat...
1. Air enters a converging-diverging nozzle with a total pressure of 1100 kPa and a total temperature...
1. Air enters a
converging-diverging nozzle with a total pressure of 1100 kPa and a
total temperature of 127°C. The exit area to throat area
ratio is 1.8. The throat area is 5
cm2. The velocity at the throat is sonic and
the diverging section acts as a nozzle. Determine the
following:
a. The mass flow
rate
b. The exit pressure and
temperature
c. The exit Mach
number
d. The exit velocity
2. The converging-diverging
nozzle now has a throat area of 100 mm2 and an exit area
of 160...
Air is at 100 kPa and 150°C, and undergoes a constant pressure process. The final temperature...
Air is at 100 kPa and 150°C, and undergoes a constant
pressure process. The final temperature of the air is 1000°C.
a) Compute the specific volume ratio.
b) Compute the boundary work (kJ/kg)
c) Compute the change in specific internal energy
by:
1. Using the tables.
2. Integrating the polynomial (cp)
3. Assuming constant specific heat.
d) Repeat c for specific enthalpy
e) Compute the heat
Air enters a compressor at 20 oC and atmospheric pressure, and exits at 200 oC and...
Air enters a compressor at 20 oC and atmospheric pressure, and
exits at 200 oC and 0.8 MPa. The output stream flows at a linear
velocity of 2 m/s, through an exit diameter of 10 cm. What is the
power input to the compressor? (Answer: 16.7 kW)
Air enters the compressor at 100 kPa, 300 K and is compressed to 1000 kPa. The...
Air enters the compressor at 100 kPa, 300 K and is compressed to
1000 kPa. The temperature at the inlet to the first turbine stage
is 1400 K. The expansion takes place isentropically in two stages,
with reheat to 1400 K between the stages at a constant pressure of
300 kPa. A regenerator having an effectiveness of 100% is also
incorporated into the cycle. The turbine and the compressor each
have am isentropic efficiency of 80%. Determine the following:
(a.)...
Fluid (air) enters a nozzle at 150 m/s, 26.85 oC, and at a pressure of 200...
Fluid (air) enters a nozzle at 150 m/s, 26.85 oC, and at a
pressure of 200 kPa. Assuming isentropic flow, evaluate the
temperature and pressure of the fluid at a location where the speed
of fluid equals the speed of sound. What is the ratio of the area
at this location to the entrance area?
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