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  3. ) a 50 mm-diameter propeller was installed in a 15

) A 50 mm-diameter propeller was installed in a 150 mm-diameter water pipe and the propeller...

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Mechanical Engineering

) A 50 mm-diameter propeller was installed in a 150 mm-diameterwater pipe and the propeller speed was measured for a range ofwater discharge in the pipe. The water had a density and dynamicviscosity of 1000 kg/m3 and 0.00112 Ns/m2respectively. The measured results were as follows:

Q (litres/s):1228456395120160180
N (rps):510152030406080

Plot the dependence of propeller coefficient against propellerReynolds number. A geometrically similar propeller with diameter100 mm was installed in a 300 mm-diameter pipe conveying oil withdensity 800 kg/m3 and dynamic viscosity 0.007Ns/m2 . Estimate the discharge in the oil pipe formeasured propeller speeds of 40 rps and 90 rps.

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