Conclusion
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CONCLUSION
FLOWRATE MEASUREMENT Many type of devices using principle involved in the Bernoulli equation have been developed to measure fluid velocities and flow rates. An effective way to measure the flow rate through a pipe is to place some type of restriction within the pipe as shown in figure an to measure the pressure difference between the low-velocity, high pressure upstream section (1), and the high-velocity, lowpressure downstream section(2). Three commonly used types of flow meters are illustrated: the orifice meter, the nozzle meter, and the ventury meter. The operation of each is based on same physical principle – an increase in velocity causes a decrease in pressure. The difference between them is a matter of cost, accuracy, and how closely their actual operation obeys the idealized flow assumptions. We assume the flow is horizontal(z1=z2), sterady, inviscid, and incompressible between points (1) and (2). The Bernoulli equation becomes P1+½ρV²=p2 + ½ρV² (The effect of nonhorizontal flow can be incorporated easily by including the change in elevation, z1-z2, in the Bernoulli equation)
If we assume the velocity profiles are uniform at sections (1) and (2), the continuity equation can be written as Q = AıVı = A V
FLOWRATE MEASUREMENT Many type of devices using principle involved in the Bernoulli equation have been developed to measure fluid velocities and flow rates. An effective way to measure the flow rate through a pipe is to place some type of restriction within the pipe as shown in figure an to measure the pressure difference between the low-velocity, high pressure upstream section (1), and the high-velocity, lowpressure downstream section(2). Three commonly used types of flow meters are illustrated: the orifice meter, the nozzle meter, and the ventury meter. The operation of each is based on same physical principle – an increase in velocity causes a decrease in pressure. The difference between them is a matter of cost, accuracy, and how closely their actual operation obeys the idealized flow assumptions. We assume the flow is horizontal(z1=z2), sterady, inviscid, and incompressible between points (1) and (2). The Bernoulli equation becomes P1+½ρV²=p2 + ½ρV² (The effect of nonhorizontal flow can be incorporated easily by including the change in elevation, z1-z2, in the Bernoulli equation)
If we assume the velocity profiles are uniform at sections (1) and (2), the continuity equation can be written as Q = AıVı = A V
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