A scale attached to the head tank indicates the water level. A flexible hose attached to the overflow pipe returns excess water to the hydraulics bench. An adjustable overflow pipe is adjacent to the head tank to allow changes in the water level.
#Orifice flow meter calculation free
The orifice and free jet flow apparatus consists of a cylindrical head tank with an orifice plate set into its side (Figure 6.1). Stopwatch for timing the flow measurement.Measuring cylinder for flow measurement and.F1-17 orifice and free jet flow apparatus, with two orifices having diameters of 3 and 6 mm.The following equipment is required to perform the orifice and free jet flow experiment: The coefficients of velocity and discharge are determined by measuring the trajectory of a jet issuing fluid from an orifice in the side of a reservoir under steady flow conditions, i.e., a constant reservoir head. The objective of this lab experiment is to determine the coefficients of velocity and discharge of two small orifices in the lab and compare them with values in textbooks and other reliable sources. The coefficients of velocity and discharge are necessary to accurately predict flow rates from orifices. Flow entering a culvert or storm drain inlet may act as orifice flow the bottom outlet of a dam is another example. Orifices have many applications in engineering practice besides the metering of fluid flow in pipes and reservoirs. This experiment is being conducted to calibrate the coefficients of the given orifices in the lab. Therefore, for accurate results, the coefficient of velocity ( C v) and the coefficient of discharge ( C d) should be calculated for an orifice.
The flow velocity and discharge calculated based on the Bernoulli’s equation should be corrected to include the effects of energy loss and viscosity.
Flow measurement by an orifice is based on the application of Bernoulli’s equation, which states that a relationship exists between the pressure of the fluid and its velocity. If the geometric properties of the orifice and the inherent properties of the fluid are known, the orifice can be used to measure flow rates. IntroductionĪn orifice is an opening, of any size or shape, in a pipe or at the bottom or side wall of a container (water tank, reservoir, etc.), through which fluid is discharged. Experiment #6: Orifice and Free Jet Flow 1.
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