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Ali Hamza
Mechanical
03 Feb 2019

How experimental determination of Hydraulic Coefficient is done??

Experimental Determination of HydraulicCoefficients

Co-efficient of Discharge (Cd)

β’ The water is allowed to flow through an orifice fittedto a tank under a constant head at H.

β’ The water is collected in a measuring tank for thetime t.

β’ The height of water in the measuring tank isobserved and noted.

Qact =Β π΄πππ ππ π‘πππ β π»πππβπ‘ ππ π€ππ‘ππ ππ π‘βπ π‘ππππ‘πππ ππ πππππππ‘πππ

Cd = ππππ‘ππ‘β=ππππ‘π΄πππ ππ πππππππ β 2ππ»

β’ Suppose C-C represents the vena contracta of the jet of water coming out of the orifice under constant head H.Β

β’ Consider a liquid particle is at C-C when time t=0 and it takes the position P along the jet.Β

Vertical distance = y = Β½ gt2 (t=x/V)

y= Β½ g (x2/V2 ) β V = ππ₯2Β 2 π¦Β VthΒ = 2ππ»