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Fluid: Apparatus

The document describes an experiment to determine the minor losses due to a pipe bend. The experiment measures the pressure loss across two elbows using a manometer and calculates the loss coefficient Kb. Water is passed through the apparatus and the volumetric flow rate and pressure difference are measured. The loss coefficient is then calculated and compared to the accepted literature value of 0.2.

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Abdul Jabbar
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28 views4 pages

Fluid: Apparatus

The document describes an experiment to determine the minor losses due to a pipe bend. The experiment measures the pressure loss across two elbows using a manometer and calculates the loss coefficient Kb. Water is passed through the apparatus and the volumetric flow rate and pressure difference are measured. The loss coefficient is then calculated and compared to the accepted literature value of 0.2.

Uploaded by

Abdul Jabbar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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Experiment #13

MINOR LOSSES IN THE PIPE SYSTEM


Object: To determine minor losses due to a pipe bend.

Apparatus: Fluid friction apparatus; Hydraulics bench and Stop watch.

Fig. Fluid friction apparatus

Theory: The minor loss due to a pipe bend is a function of velocity head
and is written as
But the loss coefficient in case of pipe bend is a function of bend radius (r) and
inside diameter of the bend (d) as shown below
Procedure:
1. Fill tank of hydraulics bench with clean water.
2. Connect the fluid friction apparatus with hydraulics bench.
3. Open the valve(s) that allows flow to the section under
consideration and close all the irrelevant valves of the pipe friction
apparatus.
4. Connect the two ends of the tubes to the pressure tapping nipples at
the either side of the pair of elbows and the manometer.
5. Slightly open the Flow control valve at the hydraulics bench.
6. Remove air bubbles from the tubes by opening the Vent valve and
Drain valves of differential manometer.
7. Read the heads in the monometers corresponding to the pressure
along entry and exit of the elbows.
8. Collect water in the volumetric measuring section of the hydraulics
bench. Read the volume collected as well as time taken to collect that
volume of water.
9. Open the Flow control valve at the hydraulics bench slightly more for
taking new reading.
10. Repeat steps 7 and 8 to observe new readings.
11. Carry out computations as per table below and compare the
average value of Kb for a pipe bend with that given in literature i.e.
Kb = 0.2.
Observations & Calculations:

S.N Head (cm) Discharge (cm3/sec) Kb=


o 10108.2
hl
Q2

h1 h2 hl= Vol Vol T Q=V/T


h1- h2
cm cm cm lit m3/s sec cm3/sec

Average Kb =

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