Problem 1D (1 Point): For both Fanno and Rayleigh flows in a constant-area duct, maximum entropy rise is achieved by the fluid once the flow becomes PROBLEM 2 (20 Points): A converging-diverging nozzle (CDN) (de Laval Nozzle) utilizes air that is V-0 stored in a stagnation chamber and is discharged to a zone with a back pressure of PB = 100 kPa abs. The stagnation temperature and pressure are To = 300 K and Po 250 kPa abs, respectively. The area ratio (AR) of the CDN is 4 and its exit area is 1 m. (a) What is the mass flowrate flowing through the CDN? (b) Determine the specific cross-sectional area (ANSW) To A NSW = ? Athroat Throat Shock Exit of the diverging section of the CDN where the normal shock wave is located.