For a nozzle with the following data AeAt = 1.616, P01 = 1 atm, Pe = 0.947 atm, what is the the Mach number at the throat of the nozzle?
A. 0.25
B. 0.50
C. 0.75
D. 0.58
Answer:A
For a nozzle with the following data AeAt = 1.616, P01 = 1 atm, Pe = 0.947 atm, what is the the Mach number at the throat of the nozzle?
A. 0.25 B. 0.50 C. 0.75 D. 0.58
Explanation: Given, AeAt = 1.616, P01 = 1 atm, Pe = 0.947 atm P01 = P0e = 1atm P0ePe=10.947 = 1.056 From the isentropic table: For P0ePe = 1.056, we get Mach number as Me = 0.28 For Me = 0.28, AeA∗ = 2.166 (From the gas table) AtA∗=AtAeA∗Ae=2.1661.616 = 1.34 For AtA∗ = 1.34, we get Mt = 0.5