Bernoullis principle applies to Venturi tubes that are used in many practical devices such as air brush

Bernoulli€™s principle applies to Venturi tubes that are used in many practical devices such as €œair 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.

Transcribed Image Text:

Water flow Injector Mix flow Metering valve Fertilizer flow