To conduct the performance test on Francis turbine under constant speed.
Francis Turbine setup with Centrifugal Pump, Pressure Gauges, Weighing Balance with Weights, etc.
Start the pump by pressing the start button.
Select the speed, then apply the weight on the pan and note the spring balance reading.
Radius of brake drum (R)= 0.15 m
Dead weight of the pan (W) =
Spring balance reading (S) =
Torque (τ) =
τ (N-m) = (W - S) × R × gRotate the inlet valve and insert the tachometer.
Speed of motor (N)=
Note the supply head reading.
Supply pressure =
Supply head (Hs) =
Note the vaccum head reading.
Elevation difference, z = 0.45m
Vaccum pressure =
Total pressure =
H (m) = Hs + zTake the hook gauge reading to find the discharge.
Initial reading (water level till crest) =
Final reading =
Head of water =
Actual discharge, Qact =
Qact (m3/sec) = 2⁄3 × Cd × l × √(2g) × h(3⁄2)Actual discharge, Qact =
Speed of motor (N) =
Torque (τ) =
Total pressure (H) =
Specific Weight of water (γ) = 9810N/m3
Input power =
Input Power (W) = γ × Qact × HOutput power =
Output Power (W) = (2 × π × N × τ)⁄60Efficiency =
Efficiency (%) = Output Power⁄Input Power× 100Trial =
Both ends of the pipe must be trimmed to ensure parallel faces.