_energy Equation - Flow Measurement.ppt

Fluid Flow – FLOW 1.MEASURMENT A volumetric tank 1.20 m in diameter and 1.50 m high was

filled with oil in 16 minutes and 32.4 seconds. What is the average discharge in L/min? 2. A weigh tank receives 7.65 kg of liquid having specific gravity of 0.86 in 14.9 seconds. What is the flow rate in L/min? 3. Calculate the discharge in L/sec through a 100 mm diameter orifice under a head of 5.5 m of water. Assume CC = 0.61 and CV = 0.98.

Fluid Flow – FLOW MEASURMENT 4.Calculate the discharge of water through diameter orifice shown. Assume CD = 0.61

a 140 mm

Fluid Flow – FLOW 5. An open cylindrical tank. 2.4 m in diameter and 6 m MEASURMENT

tall has 1 m of glycerin (SG = 1.5), 2.5 of water and 1.5 m of oil (SG = 0.82). Determine the discharge through the 125 mm diameter located at the bottom of the tank. Assume the liquid levels are constant and CD = 0.65. 6. A 50-mm diameter circular sharp-edged orifice at the side of a tank discharges water under a head of 3 m. If the coefficient of contraction CC = 0.63 and the head lost is 240 mm, compute the discharge and the coefficients of CV and discharge C.

Fluid Flow – FLOW MEASURMENT 7. A calibration test of a 12.5 mm diameter circular sharp- edged orifice in a vertical side of a large tank showed a discharge of 590 N of water in 81 seconds at a constant head of 4.70 m. Measurement of the jet showed that it traveled 2.35 m horizontally while dropping 300 mm. Compute the three orifice coefficients.

Fluid Flow – FLOW 8. A jet is issued from the side of a tank under a constant head of 3 m. MEASURMENT The side of the tank has an inclination of 1H to 1V. The total depth of water in the tank is 6.70 m. Neglecting air resistance and assuming CV = 1.0, determine the following: a) the maximum height to which the jet will rise b) the point it strike a horizontal plane 1.20 m below the bottom of the tank. c) the velocity of the jet as it strike the ground.

Fluid Flow – FLOW 9. COMMUNICATING TANKS. Two vertical tanks 1 and 2 having MEASURMENT diameters 2 m and 3 m, respectively, are connected with a 200 mm diameter tube at its lower portion, and having C = 0.60. When the tube is closed , the water surface in tank 1 in 5 meters above tank 2. How long will it take after opening the tube, for the water surface in tank 2 to rise 1 meter? How long will it take after opening the tube to stop the flow? 10. COMMUNICATING TANKS. In the figure shown, how long does it take to raise the water surface in the tank by 2 m? The right side of the figure side is a very large reservoir of constant elevation

Fluid Flow – FLOW MEASURMENT

11. A tank 2 m in diameter and 10 meters high. Initially, it is filled with water up to the brim. A 30 mm diameter orifice is punched at the bottom. How long it will take to empty 6 meters of water? How long it will take to empty the tank? Assume C = 0.65 12. A swimming pool 15 m long, 10 m wide and 3 m deep on one side and 1.6 m on the other end is fitted with a drain pipe 200 mm in diameter at the lowest part of the pool. Compute the time required to drain the full content of the pool assuming C = 0.80.

Fluid Flow – FLOW 13. PITOT TUBE. A glass tube with 90° bend is open at both ends. It is MEASURMENT inserted into a flowing stream of oil (SG = 0.90) so that one of the

opening is directed upstream and the other is directed upward. If the oil inside the tube is 50 mm higher that the surface outside, determine the velocity measured by the tube. 14. A Pitot – static tube is used to measure air speed. With water in the differential manometer and a gage difference of 75 mm, calculate the air speed using ρAIR = 1.16 kg/m3.

Fluid Flow – FLOW 15. A vertical Venturi meter, 150 mm in MEASURMENT diameter is connected to a 300 mm diameter pipe. The vertical distance from the inlet to the throat being 750 mm. If the deflection of mercury in the differential manometer connected from the inlet to the throat is 360 mm, determine the flow of water through the meter if the meter coefficient is 0.68. Determine also the head lost from the inlet to the throat.

Fluid Flow – FLOW 16. During a test on a 2.4 m suppressed weir 900 mm high, the MEASURMENT head was maintained constant up to 300 mm. In 38 seconds, 28,800 L of water were collected. What is the weir factor CW? 17.A suppressed weir 7.5 m long is to discharge 10.125 m3/s of water onto an open channel. The weir factor CW = 1.88. What must be the height of the weir if the water behind the weir must not exceed 1.80 m deep when (a) considering velocity approach and (b) neglecting velocity approach. 18.Determine the flow over a suppressed weir 3 m long and 1.2 m long high under a head of 900mm (a) considering velocity of approach and (b) neglecting the velocity of approach. The coefficient of discharge is 0.65.