The following figure shows a supersonic engine inlet design. That engine inlet is being operated at off-design conditions with an inflow Mach number and pressure and temperature of 2.8 and 24 kPa and 200 K, respectively. The lower wall of the inlet turns through an angle of 6° towards the flow while the angle of the upper ramp is 11° towards to the flow.

Determine the flow direction and pressure in region 4 and 4’.
c) Estimate the velocity difference across the slip layer formed between regions 4 and 4’.

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.