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)
- Problem # 3: Friction losses and volumetric discharge through a water piping system The cold-water faucet in a house is fed from a main water line through the following simplified piping system: A. A 160 ft long ¾ in ID copper pipe leading from the main line to the faucet base B. Six 90° standard elbows C. One wide-open angle valve with no obstruction D. The faucet which is considered to be composed of twd parts: 1) a half-open globe valve and 2) a nozzle having a diameter of 0.10 in. The pressure in the main line is 60 psig (virtually independent of flow) and the velocity there is negligible. At the faucet, the pressure is atmospheric. Assume the density of water to be 62.4 lbm/ft and the kinematic viscosity of water is 1.22 ×10³ ft²/s. Find the maximum volumetric flow rate of discharge from the faucet. This is trial and error problem. For a first trial, assume the Fanning friction factor to be 0.007. Use 5×106 ft for copper roughness. Neglect changes in elevation throughout the…arrow_forward4. A single-acting reciprocating pump has a diameter (piston) of 150 mm and stroke length 350 mm. The centre of the pump is 3.5 m above the water surface in the sump and 22 m below the delivery water level. Both the suction and delivery pipes have the same diameter of 100 mm and are 5 m and 30 m long respectively. If the pump is working at 30 r.p.m., determine: (i) The pressure heads on the piston at the beginning, middle and end of both suction and delivery strokes. (ii) The power required to drive the pump. Take atmospheric pressure as 10.3 m of water.arrow_forwardIn the system given below, the water taken from the A chamber is transmitted to the D chamber with the help of the pump at the C point. The power of the pump at the C point, the local loss coefficient due to the valve at the B point and other data are given in the table. How many meters (m) is the elevation difference between these two reservoirs? Hopper-Pipe connections are sharp (90⁰ junction). Note: The Colebrook-White equation will be used in the solution. Kinematic viscosity value will be taken as 1.13x10-6 m2 / s. please fast helparrow_forward
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