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FLOW MEASUREMENT
Device | Measurement |
Venturimeter | rate of flow (discharge) |
Flow nozzle | rate of flow |
Orifice meter | rate of flow |
Bend meter | rate of flow |
Rotameter | rate of flow |
Pitot tube | velocity |
Hot wire anemometer | air & gas velocity |
Current meter | velocity in open channels |
Venturimeter
Qac = Cd Qth
Cd = coefficient of discharge = 0.95 to 0.98
h = venturi head which is difference between pressure heads
Orifice meter
Cd for orifice meter = 0.68 - 0.74
Cd for orifice meter = 0.68 - 0.74
a1 = πd2/4
a2 = πdc2/4
Pitot Tube
Hydraulic Coefficients
Flow through orifice in the tank
Time required to lower the level from H to h
Discharge through orifice when head over orifice is h
L = length of crest H = head above crest
6 videos|97 docs|55 tests
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6 videos|97 docs|55 tests
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