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A centrifugal compressor delivers 20 kg/s of air at 0.32 MN/m2 when running at 17500 rpm and absorbing 2800 kW. The inlet total conditions are 0.1 MN/m2 and 17C and the diameters of the impeller tip and diffuser inlet are 0.43 and 0.53 respectively. The diffuser passgers are 54 mm deep and half the toal losses occur in these. Determine for this machine the slip factor, isentropic efficiency and the Mach number at the diffuser inlet, stating your assumptions. For air Cp=1.0 kJ/kg.K and sp. Heat ratio = 1.4.
aluminum oxide al2o3 has a surface energy of 1 jm2 estimate the maximum amount of energy jg that is available for
determine the power needed to drive the low speed turbine given maximum velocity in the test section 140 mih with 12 x
A paper clip is made of wire 0.7 mm in diameter. If the original material from which the wire is made is a rod 25 mm in diameter, calculate the longitudinal engineering strain and true strain that the wire has undergone during processing.
describe possible methods that can be used to separate materials such as polymers, aluminium alloys and steels from one another.
a coating that is known to behave as a bingham plastic is being applied to a vertical surface. derive a relationship
x 3000 a100 m 75 c kgcd 0.5 skydiver area 0.4m2cd 1.2 parachute area 40m2a sky diver weighing m kg jumps from a
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boom ab is held in the position shown by three cables. knowing that the tensions in cables ac and ad are 4 kn and 5.2
the old rigid tank problem a tank has a volume of 600 gallons and holds 300 lbm of water at 40 psig pressure. what is
you are designing a centrifugal compressor system to compress hydrogen at 200 kpa absolute to 7000 kpa absolute
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