Math Is Fun Forum

Kerri

Guest

Engineering help - Fluids

Hey all, I'm stuck with my engineering work =/ any help would be appreciated

A Farmer builds a water storage tank 12m above ground, as shown here:

img408.imageshack.us/img408/6195/irrigationsystem.jpg

a) The water is fed via a 200m long, 125mm diameter pipe to a field for irrigation purposes. The pipe has a friction factor of 0.008. Using the K data below, show that the water flow rate (kg/s) in the pipe is approximately 26kg/s

Data:

K Factors: Tank Exit 0.5, Bends 0.9 (x2), Valve 1.0 (Total: 3.3)
Water Density: 1000kg/m3

b) It is decided to monitor the flow rate through the system by installing a venturi meter having a throat diameter of half the pipe diameter in the line. The discharge coefficient for the meter is 0.98. The resulting pressure drop across the venturi meter is to be read by an oil manometer. If the oil has a relative density of 0.9, determine the pressure drop expressed as a height (m) of manometer fluid for the flow rate calculated in (a).

c) In order to help direct the water flow the farmer decides to attach a nozzle onto the end of the pipe outlet. The diameter of the nozzle outlet is half that of the line. For the flow rate determined in (a) calculate the resultant force (N) on the nozzle.

State any assumptions or approximations made in your answers