Practical 2 - Flow Measurement

Please download this spreadsheet to obtain data for this experiment.

Supporting Information

Bend meter

(C_d ~ 0.60 for comparison with experimental value)

Nominal pipe diameter = 80 mm

Q = C_d x a x √(2g) x h^0.5

Venturi meter

(C_d ~ 0.97 for comparison with experimental value)

Approach pipe diameter = 80 mm and throat diameter = 38 mm

Q = C_d x a₁ x √(2g/(k² – 1)) x h^0.5

Where k = a₁/a₂ (a₁ and a₂ is the upstream pipe and throat diameter, respectively)

Pitot tube meter

(C_d ~ 0.99 for comparison with experimental value)

Nominal pipe diameter = 80 mm

Q = C_d x a x √(2g) x h^0.5

Orifice meter

(C_d ~ 0.66 for comparison with experimental value)

Approach pipe diameter = 80 mm and throat diameter = 26 mm

(Discharge equation identical to Venturi)