Problem 2. (30\') Consider the supersonic (choked at the throat) blow down tunne

Question

Problem 2. (30') Consider the supersonic (choked at the throat) blow down tunnel shown in the figure below. The facility takes compressed air and accelerates it through a nozzle (station 1 - nozzle throat) to create supersonic flow in a test section (station 2) and dumps the air to atmosphere (station e). The design specifies the following A2/Ae = 4, A2/A1 = 6. T1 = 300 K, and P1/P0 = 40. For air: R = 287 J/(kg K) and gamma = 1.4. (1) Find the Mach numbers at locations 1, 2, and e. (M1, M2 and Me). (3x5') (2) Find the exit velocity and thr ratio of exit to back pressure (Ve and Pe/P0). (2x5') (3) If Ae is reduced, find Ae/A2 so that Me = 1. (5')

Explanation / Answer

refer the link below

http://www.grc.nasa.gov/WWW/k-12/airplane/nozzled.html

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