Question
A conical diffuser of length 6 in. is used to expand a pipe flow from a diameter of 2 in. to a diameter of 3.5 in. For a water flow rate of 750 gal/min, estimate the static pressure rise. What is the approximate value of the loss coefficient?
Step 1
The aspect ratio is given by the square of the ratio of the final diameter to the initial diameter. This can be calculated as follows: \[ \frac{D_2^2}{D_1^2} = \left(\frac{3.5}{2}\right)^2 = 3.06 \] Show more…
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Two water reservoirs, the surface levels of which differ by $1.5 \mathrm{~m}$, are connected by a pipe system consisting of a sloping pipe at each end, $7.5 \mathrm{~m}$ long and $75 \mathrm{~mm}$ diameter, joined by a horizontal pipe $300 \mathrm{~mm}$ diameter and $60 \mathrm{~m}$ long. Taking entry head losses as $0.5 u^{2} / 2 g$ and $f=0.005(1+25 / d)$ where $d \mathrm{~mm}$ is the pipe diameter, calculate the steady rate of flow through the pipe.
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