(Adv.) Develop a program that will track the process in time as described in Problems 15.51 and 15.53 Investigate the time it takes to bring the tank pressure to 125 kPa as a function of the size of the nozzle exit area. Plot several of the key variables as functions of time.
Problem 15.51
A 1-m3 insulated tank contains air at 1 MPa, 560 K. The air in the tank is now discharged through a small convergent nozzle to the atmosphere at 100 kPa. The nozzle has an exit area of 2×10−5 m2. a. Find the initial mass flow rate out of the tank. b. Find the mass flow rate when half of the mass has been discharged.
Problem 15.53
Air is expanded in a nozzle from a stagnation state of 2 MPa, 600 K, to a static pressure of 200 kPa. The mass flow rate through the nozzle is 5 kg/s. Assume the flow is reversible and adiabatic and determine the throat and exit areas for the nozzle.
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