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Exp 5 Eeggsegge

This document summarizes an experiment on orifice and jet flow performed by 4 students. The experiment involved measuring the flow rate of water through an orifice, calculating discharge coefficients, and comparing the experimental jet trajectory to theoretical values. Key results included a discharge coefficient of 0.97, velocity coefficient of 0.94, and contraction coefficient of 0.86. The experimental and theoretical jet trajectories were found to agree with small errors.

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39 views5 pages

Exp 5 Eeggsegge

This document summarizes an experiment on orifice and jet flow performed by 4 students. The experiment involved measuring the flow rate of water through an orifice, calculating discharge coefficients, and comparing the experimental jet trajectory to theoretical values. Key results included a discharge coefficient of 0.97, velocity coefficient of 0.94, and contraction coefficient of 0.86. The experimental and theoretical jet trajectories were found to agree with small errors.

Uploaded by

aeaeae335
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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King Faisal University

College of Engineering

CRN:67638

Fluid of Mechanics Lab

Name and Number of


Experiment Orifice and Jet Flow exp#5

Date of Performing the 11 1 2023


Experiment

Date of Submission the 18 1 2023


Report
 Ezzaddin Sallah Ahmed 220034468
Students’ names &  Ahmed Alsaleem 220019933
ID numbers  Mohammed Alminhali 220017361
 Mohammed Alghuwainem 219012136

Group no. Group #1

Section no.-Section Day Sec 2 – Wednesday

Lab Instructor Eng.Amer ِAljabr


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1. Install the required orifice
2. Adjust the overflow pipe to obtain a required level in the tank
3. Open the water supply valve to obtain a steady flow with minimum overflow
4. wait until the level in the tank and jet profile is stable before adjusting the probes tips to be in-line with the
center of the jet and record the probe tip profile as well as the Y = 0 mark
5. Record the flow volume by using the stopwatch and bench-measuring tank.

4. Results And Discussion


Water level, H 0.38m
Volume, Lt 35 liter
Time, s 99.57second
Flow rate, QA = volume/time 0.0003515115 m3/s
Distance from the board, m 0.04m

Y Ythe Error% X 2YH

0 0.001 100 0.04 0

0.004 0.0042 4.761905 0.08 0.07797

0.01 0.0094 6.382979 0.12 0.12328

0.0185 0.0168 10.11905 0.16 0.16769

0.028 0.0263 6.463878 0.2 0.2063

0.041 0.0379 8.17942 0.24 0.24963

0.057 0.0515 10.67961 0.28 0.29463

0.076 0.0673 12.92719 0.32 0.33988

0.095 0.0853 11.37163 0.36 0.38

0.12 0.1053 13.96011 0.4 0.42708

0.0003515115
Cd= = 0.97
π × 0.25× 0. 013 × √ 2× 9.81× 0.38
2

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0.45
0.4 f(x) = 1.13107272727273 x − 0.0221900000000001
0.35 R² = 0.995052994310661
0.3
0.25

2√𝑌𝐻
0.2
0.15
0.1
0.05
0
0.01 0.1 1
X

From this plot we can find Cv = 1.1311

0.4
= =0.94
2 √ 0.38 × 0.12

Cd 0.97
The coefficient of contraction CC= = =0.86
C v 1.1311

Theoretical and experimental curves of the jet trajectory path

jet trajectory path


0
0.01 0.1 1
-0.02

-0.04
Height (Y)

-0.06 Yexp
Ythe
-0.08

-0.1

-0.12

-0.14
Distance (X)

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5. Conclusion
 From this experiment we can realize that actual flow is different than the theoretical flow and that
happen for many reasons. A problem in the machine or the person who take the time or even the losses
in the orifice.

 The coefficient of discharge for orifices in pipes varies range is from 0.60 to 0.80 and our value
is 0.97 and it is greater

 Coefficient of velocity for orifices in pipes varies range is from 0.95 to 0.99 and that is greater
than our value which is 0.94

 Coefficient of contraction for orifices in pipes varies range is from 0.618 to 0.630 and our value
is 0.86

 Experimentally measured trajectory agrees with the theoretical one and have a small error

 The effect of the water head on the orifice is the increasing of the flow energy such that
The more height of the water head the more velocity value will experiences the water
Flow ejected by the orifice.

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