2 (25 MARKS) With the aid of diagrams, explain what are Mach waves and how they are formed. From your understanding, how can the speed of a fighter aircraft model inside the wind tunnel can be estimated by observing the Mach wave angle using optical measurements? a. b. C. The isentropic relation between different properties of flow can be written as: a2 a1 -9-9-9 = (CO1:PO1 - 4 Marks) = = By using the given equation and the isentropic flow relations, derive the equations for the ratio of temperature, pressure, and density in terms of Mach number. (CO1:PO1 - 6 Marks) As an aerodynamics engineer, you are given a task to design the inlet of a supersonic engine that is travelling at supersonic speed. In the intake section (before encountering the shock train compression), the pressure and temperature of the supersonic flow are found to be 7.5 kPa and -65 C. Investigate the Mach number of the flow at the exact position, and the corresponding stagnation temperature. From your answers, elaborate on