AE6503 Aerodynamics II
Second year, Department of Aeronautical Engineering
First and second Units Questions.
Answer ALL Questions
PART A – (10 * 2 = 20 Marks)
  1. Write the steady flow energy equation for an adiabatic flow of air?
  2. Differentiate between compressible and incompressible flow
  3. Write the adiabatic relation between temperature, pressure and density.
  4. Differentiate between static and stagnation temperature?
  5. Define M* and give the relation between M and M*?
  6. Define Mach angle and Mach wedge?
  7. What is chocked flow? State the necessary conditions for this flow to occur in a nozzle?
  8. Differentiate between shock wave and expansion wave.
  9. Define Shock angle (β) and Flow deflection angle (θ).
  10. What is meant by Reflection and Intersection of Shocks and Expansion waves?
Answer ALL Questions
PART - B [80 Marks]
11.  Derive all the isentropic relations for one dimensional compressible gas flows.                    (16)
12.  With neat sketch briefly explain operating performance of Convergent-divergent nozzle.   (16)
13.  a. Derive all the area-Mach number-velocity relation and explain why convergent divergent nozzle is needed for supersonic flow.                                                                                        (8)
b. Derive the area-Mach number relation for isentropic flow through variable area duct      (8)
14.  a) Derive Prandtl equation and from that prove that the Mach no. behind normal shock is always less  than one                                                                                                                  (8)
b) Derive the Rankine-Hugonoit pressue density relationship for the shock and explain its significance.                                                                                                                            (8)
  1. With a neat sketch, explain Prandtl-Meyer expansion. Derive an expression for Prandtl-Meyer function.                                                                                                                           (16)