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Question: An 8 GPM flow of petroleum oil is being delivered through a 0.5- in. hose to a hydraulic motor. The hose length is 16 ft, and no elbows or other fittings need be considered. The following handbook data are available:
The handbook data is for fluid with a specific gravity of 1.0 and the specific gravity of the oil is 0.865. The table data must be multiplied by a correction factor, defined by the following equation, to obtain the projected pressure drop per foot of hose length.
Cf = 0.73sg + 0.268
where, Cf = correction factor (dec)
Sg = specific gravity (dec)
1. Compare the expected pressure drop in the line if the fluid viscosity is ν = 20.6 cS, and 87.7 cS.
2. Calculate the hydraulic power loss (hp) for both viscosities.
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