An airplane flies with a speed of 971km/h.The engine inlet area is 0.8 m^2 and the air density at the inlet 0.736kg/m^3 The jet velocity is measured as 1050 km/h. The exhaust area is 0.558 m^2 and the exhaust density is 0.515 kg/m^3.

A hovercraft weighs M = 1500 kg and hovels without changing altitude. The exit flow exhausts to atmospheric pressure at sea-level. The flow is steady, incompressible and uniform properties can be assumed on all control surfaces. Assume air density = 122 kg/m^3.

Water at 20 ° C fl ows through a long elliptical duct 30 cmwide and 22 cm high. What average velocity, in m/s, wouldcause the weight fl ow to be 500 lbf/s?

A) A 0.4 m diameter fan running at 970 rev min' is tested when the air temperature is 10 °C and the barometric pressure is 772 mm Hg and the volume flow rate Q=0.7 m s. Find the corresponding volume flow of a geometrically similar fan of 1 m diameter, running at 500 rev min at same conditions. Assume that the fan efficiency is unchanged. Ja

Pump specific speed and turbine specific speed are “extra” parameters that are not necessary in the scaling laws for pumps and turbines. Explain, then, their purpose.

Air at 20⁰c and 1 ATM flows over a flat plate, v= 35 m/s. The plate is 75 cm long and guarded at 60⁰c. Suppose the depth of one Units on Z, count the transfer of Calor from that plate.

A horizontal water jet impinges on a vertical-perpendicular plate. The discharge is 0.2 m/s. If the horizontal external force required to hold the plate in place is 9.7 kN, what is the velocity of the water (m/s)? water density = 1000 kg/m3. Jet area = 0.1 m2. 48.5 %3D