The nozzle which furnished the water to a certain hydraulic turbine 275mm in diameter and has coefficients of velocity and discharge of 0.975 and 0.96, respectively. The nozzle is supplied from a 60cm pipe in which the water approached the nozzle with a total head of 330m. Compute the following: a. Energy per second delivered by the jet to the turbine. b. Energy measured in hp lost in passing through the nozzle.

Fluid Mechanics Hw #7

9.The pump shown delivers 115 li/s of oil, sg = 0.84, toreservoir D at elevation 72 m. The energy lost in thesuction line is 3.2 J/N and in the discharge line is 7.6 J/N. a.Compute the total head added by the pump. b.How many kW does the pump supply the system? c.If the pump is 85% efficient, how much power does it need?

The pump draws water at 30 liters per second from reservoir A and lifts it to reservoir B as shown. The head loss from A to 1 is three times the velocity head in the 150mm diameter pipe and the head loss from 2 to B is twenty times the velocity head in the 100mm diameter pipe. Which of the following most nearly gives the powet delivered by the pump? Choices: 59.38 kW 75.14 kW 44.82 kW 53.96 kW

The 600 mm pipe shown conducts water from reservoir A to a pressure turbine, which discharges through another 600 mm o pipe into tail race B. The head lost from A to 1 is 5 times the velocity head in the pipe and the head lost from 2 to B is 0.2 times the velocity head in in the pipe. If the discharge is 700 L/s A) Compute for the total head lost 1. 05: Compute for the extracted energy cause by the turbine Compute for the hp given up by the turbine. V Answer A) EL 60m 600 mm 1.63 m 58.37 m 537.3 hp 600 mm o B ▷ EL 0 m

Give the solution.

7. A heavy Oil (y = 9000 N/m³) is flowing at a rate of 0.65 m³/s in the system shown. If the total head lost between point reservoir A to closed tank B is 2.5 m and the pressure at B is 70 kPa A) Compute the added energy produce by the pump B) Compute the power in hp that must be supplied by the pump to the flow C) Compute for the pressure head at point 1 if the pipe from A to 1 is 150 m long and 600 mm diameter, n = 0.011 EL 50m 600 mm El Om 70 kPa El 60 m

Kerosene (SG= 0.80 and ? = 68°?) flows from the tank shown and through the 1/4-in.-diameter (ID) tube. Determine the mean velocity in the tube and the discharge. Assume that the only head loss is in the tube.

2. A nozzle 3 m long has a diameter of 1.3 m at the upstream end and reduces linearly to 0.45 m diameter at the exit. A constant flow rate of 0.12 m /sec is maintained through the nozzle. Find the acceleration at the midpoint of the nozzle. Hint: velocity at any point is equal to the flow rate divided by the area of the pipe at that point. [Ans. a=0.02579 m/s/s] 3. Water accelerates in an upward sloping pipe at a rate of 1.5 m/s?. The pipe slope is set at 40 degrees and has a length of 6 m. If the pressure is 63 kPa at section 1, what will be the pressure at section 2? [Ans. P2=16165.52 Pa] 1

A pump is attached to a fire hydrant, where it is desired to produce a jet that rises to a maximum height of 40 m and delivers water at a rate of 100 L/s. At the attachment location, the diameter is 100 mm and the pressure is estimated as 150 kPa. The discharge nozzle has a diameter of 80 mm and is inclined at an angle of 50 degrees to the horizontal. If friction losses are neglected, estimate the head that must be added by the pump to achieve the desired objective. The path of the water jet is parabolic.