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’.

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.

Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2