Consider the following statements for compressible flow through a varying area passage:
1. For a convergent nozzle, if the exit pressure is less than critical, external flow will not be isentropic.
2. Supersonic-subsonic - diffuser would appear similar to nozzle and works without irreversibility.
Which of the statements given above is/are correct?
a. 1 only b. 2 only
c. Both 1 and 2 d. Neither 1 nor 2