MAE 4321 – HW # 3, Ideal Cycle Analysis

1. Calculate and plot the specific thrust and SFC for an ideal ramjet as a function of M0 (2,3,4) for constant Tt4 (2000,2500,3000K). Discuss the results.

2. JDM # 5.3. Calculate the performance by hand for Tt4=18000 K and C =10. Verify your answer with the PARA code; then use the PARA code for the remaining cases. Plot the SFC as a function of specific thrust in the form of a carpet plot with constant values of Tt4 and C

3. a. JDM # 5.9 – Ideal Turbojet

b. Calculate the mass flow rate for a required thrust of 150 kN (33,720 lbf)

c. Calculate the thermal, propulsive and overall efficiency and the specific impulse.

4. Calculate the performance of an ideal, unmixed-flow turbofan at M0 = 0.0/Alt=SL. Assume C =30, F =1.8, = 4, Tt4 = 32000 R.

a. By hand

b. Use the PARA code to generate a carpet plot of SFC as a function of specific thrust for C =(30,40,50), and Alpha = (4,6,8). Assume M0 = 0.0/Alt=SL, Tt4 = 32000 R, F =1.8 .

5. Calculate the performance of an ideal, mixed-flow turbofan at M0 = 2.0, alt = 15,000 Assume C =12, Alpha = 0.4, Tt4 = 20000 K

a. By hand

b. Verify by using the PARA code, Alpha = 0.4