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

(c) A 50 mm-diameter propeller was installed in a 150 mm-diameter water pipe and the propeller speed was measured for a range of water discharge in the pipe. The water had a density and dynamic viscosity of 1000 kg/m³ and 0.00112 Ns/m² respectively. The measured results were as follows:

Q (litres/s):	12	28	45	63	95	120	160	180
N (rps):	5	10	15	20	30	40	60	80

Plot the dependence of propeller coefficient against propeller Reynolds number. A geometrically similar propeller with diameter 100 mm was installed in a 300 mm-diameter pipe conveying oil with density 800 kg/m³ and dynamic viscosity 0.007 Ns/m² . Estimate the discharge in the oil pipe for measured propeller speeds of 40 rps and 90 rps.

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samet mamat answered 5 months ago

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