2. Air is steadily discharged from a large chamber in which the pressure is 500 kPa,...
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2. Air is steadily discharged from a large chamber in which the pressure is 500 kPa, the temperature is 30°C, and the velocity is effectively zero through a nozzle, as shown in Fig. 2. Assuming one dimensional isentropic flow, find: (a) if the pressure at some section of the nozzle is 80 kPa, the Mach number, temperature, and velocity at this section. (b) if the nozzle has a circular cross-section with a diameter of 12 mm at the section discussed in (a) above, the mass flow rate through the nozzle. 3. A gas with a molar mass of 12 kg/kmol and a specific heat at constant pressure of 4.157 kJ/(kg - K) is discharged from a large chamber in which the pressure is 500 kPa, the temperature is 30°C, and the velocity is effectively zero through a nozzle. What are the critical pressure, temperature, and speed of sound of the gas? What is the maximum possible velocity that could be generated by expanding the air through the nozzle? 2. Air is steadily discharged from a large chamber in which the pressure is 500 kPa, the temperature is 30°C, and the velocity is effectively zero through a nozzle, as shown in Fig. 2. Assuming one dimensional isentropic flow, find: (a) if the pressure at some section of the nozzle is 80 kPa, the Mach number, temperature, and velocity at this section. (b) if the nozzle has a circular cross-section with a diameter of 12 mm at the section discussed in (a) above, the mass flow rate through the nozzle. 3. A gas with a molar mass of 12 kg/kmol and a specific heat at constant pressure of 4.157 kJ/(kg - K) is discharged from a large chamber in which the pressure is 500 kPa, the temperature is 30°C, and the velocity is effectively zero through a nozzle. What are the critical pressure, temperature, and speed of sound of the gas? What is the maximum possible velocity that could be generated by expanding the air through the nozzle?
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