Question: 1. A nozzle is being designed to accelerate a stream of air into 100 kPa ambient air. Nozzle A has an converging portion only with

1. A nozzle is being designed to accelerate a stream of air into 100 kPa ambient air. Nozzle A has an converging portion only with a throat area of 2 cm2. Nozzle B has the same converging section (throat area of 2 cm2) but includes a diverging section that expands to 6 cm2. If a stagnation pressure of 2500 kPa and stagnation temperature of 100 C is expected, calculate the isentropic efficiency of these two nozzles. Design a new diverging nozzle area that would yield maximum thrust for these conditions. 2.0 ca T= 310.8k c. VSRT = 353. 4 - /s A M = 1 V= 353. 4 m /5 3 A - . 2772 To = 100 ' C 100 APS = 27. 7% Po = 2500 KP 75 155, 99 k + 7 2.0 cm ? V C = 256. 35 - / s + VB = 660. 28 M = 1 M = 2.637 under expanded 3 N = 96.8 6 16.0 ca z Viser 2500 - 100 lls M = 2 . 746 ( = 244. 43 m / s T = 148. 7 K Viaan = 671. 21 "/s Area = 6+ 65 Cn 2 + 7

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