Question

Steam enters a nozzle operating at a pressure of 30 [bar] and a temperature of 320 [◦C] with negligible velocity. The steam exits the nozzle at a pressure of 15 [bar] and a velocity of 10 [m/s]. The mass flow rate is 2.5 [kg/s]. Assume the nozzle is well insulated.

Determine the exit temperature of the steam.

Answer #1

Since nozzle is insulated there is no transfer of heat from nozzle to surrounding. This implies that the process is an adiabatic process.

For an adiabatic proces we have ,

Here, we also could have written mass conservation equation and also energy equation for compressible fluid which realtes Pressure, density, and velocity, but here we can directly find exit temperature from Adiabatic relation so we haven't used those equation for this process.

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a. The throat velocity
b. The mass flow rate
c. The exit area
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Determine the mass flow rate for back pressure of...

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nozzle is designed assuming steady isentropic flow. Air enters the
nozzle at 427°C and 1000 kPa with negligible velocity. The exit
Mach number is 2 and throat area is 20 cm2.
Determine:
a. The throat velocity
b. The mass flow rate
c. The exit area
2. The nozzle now has an exit
area of 4 cm2. Air enters the nozzle with a total
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Determine the mass flow rate for back pressure of...

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