Fluid Flow Measurement Flashcards
Ratio of the actual discharge through the device to the ideal or theoretical discharge which would occur without losses
Coefficient of Discharge
This discharge may be accomplished by series of observation, usually by measuring the total amount of fluid passing through the device for a known period
Actual Discharge
This discharge can be accomplished using the Bernoulli’s Energy Theorem neglecting losses
Theoretical Discharge
Ratio of the actual mean velocity to the ideal or theoretical velocity which would occur without any losses
Coefficient of Velocity
Formula of Coefficient of Velocity
Cν = Actual Velocity/Theoretical Discharge= ν/νr
Ratio of the actual area of the contracted section of the stream or jet to the area of the opening though which the fluid flows
Coefficient of Contraction
An opening (usually circular) with a closed perimeter through which fluid flows and is used primarily to measure or to control the flow of fluid
Orifice
Formula of Theoretical Velocity in Orifice
νt = sqrt(2gH)
Formula of Actual Velocity in Orifice
ν = Cνsqrt(2gH)
Formula of Theoretical Discharge in Orifice
Qt = Asqrt(2gH)
An instrument used in measuring the discharge through pipes
Venturi Meter
The statement, “increase in kinetic energy is equal to the decrease in potential energy”, is known as the
Venturi Principle
A converging tube installed at the end of a pipe or hose for the purpose of increasing the velocity of the issuing jet
Nozzle
A bent (L-shaped or U-shaped) tube with both ends open and is used to measure the velocity of fluid flow
Pitot Tube
Overflow structures which are built across an open channel for the purpose of measuring or controlling the flow of liquids
Weirs