6.111 Bernoulli's principle applies to Venturi tubes that are used in many practical devices such as "air brush" painters, vacuum systems, carburetors, water bed drains and many other devices. One such system used to spray fertilizer is
shown in Fig. 6.42 Port A is connected to a water supply that is directed through the venturi.
At the throat of the Venturi, Port B is connected to the supply of fertilizer concentrate from a container below. Port C is the spray nozzle that directs the diluted fertilizer solution out to the plants. Port A, 10 mm in diameter, is connected to a water supply that reads 180 kPa while flowing at 12 L/min. Determine the vacuum pressure in the 3.5-mm-diameter throat if the metering valve is completely closed. Explain what will happen to the fertilizer concentrate in the container below as the metering valve is opened.
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Applied Fluid Mechanics (7th Edition)
- The below figure shows a pump that transfers a steady stream of 35◦API crude oil from an oiltanker to a refinery storage tank, both free surfaces being open to the atmosphere. Theeffective length—including fittings—of the commercial steel pipe is 6,000 ft. The dischargeat point 4 is 200 ft above the pump exit, which is level with the free surface of oil in thetanker. However, because of an intervening hill, point 3 is at a higher altitude than point 4.Losses between points 1 and 2 may be ignored.The crude oil has the following properties:Density ρ = 53 lbm/ft 3 ; Viscosity μ = 13.2 cP; Vapour Pressure Pv = 4.0 psia Answer the following questions:1. If the combination of pump and motor is 80% efficient, how much electrical power(kW) is needed to drive the pump?2. If, in order to avoid vapour lock, the pressure in the pipeline must always be above thevapor pressure of the crude oil, what is the maximum permissible elevation of point 3relative to point 4?3. If the flow in the pipeline…arrow_forwardA well is going to be installed with a sucker rod pumping unit a. For the well to be installed with a sucker rod pump calculate the effective plunger stroke length for a well with a rod pump set at 3600 ft. The well has 3/4-in. sucker rods and 2 7/8-in. tubing, and the specific gravity of the produced liquid is 0.90. The pump speed is 12 spm, the plunger is 2 in. in diameter, and the polished rod stroke length is 64 in.The well is pumped off, so the liquid level is at the pump depth. b. For well in part a surface production rate the surface with a rod pump having a volumetric efficiency of 0.8. The oil formation volume factor is 1.2arrow_forwardDetermine the power requirements for 3 m diameter, six-blade flatblade turbine impeller mixer running at 15 rpm in a 10 m diametermixing tank. Assume the fluid being mixed is water.arrow_forward
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- Given the 0.063 m length of the syringe. F=1N a. provide an equation to calculate its water flow rate if water is going to travel from a 0.063 m length of syringe with dextrose tube length of 0.5 meter to another 0.063 m syringe (see attached photo). The Inner diameter of the syringe is 0.02. While the inner diameter of dextrose tube is 0.003. b. provide an equation in order to calculate the maximum force or pressure that exerts in plunger in order to travel the water at its maximum speed.arrow_forwardDuring the daytime, water is drawn from an upper reservoir and is run through a turbine on its way to a lower reservoir in order to produce power. The pipe is 300 feet long and has a 2.0-foot diameter. It is constructed of commercial steel which has a roughness height of = 0:0018 in. Find the power extracted by the turbine if the downward volume áow rate is 20,000 gallons per minute.(Recall that H2O = 1:94 slugs/ft3, H2O = 2:4 10^-5 slugs/fts.) You may assume that the turbine is 100% efficient.(b) Find the maximum power the turbine can deliver. What is the volume flow rate (in gallons per minute) for maximum power output? (Hint: plot power vs. flow rate in order to answer this question.)arrow_forwardInside a pipe with a constant cross section, water flows. Calculate the total number of lost heads in (ft). Between suction and discharge is a 100-foot elevation difference.arrow_forward
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