The document describes an experiment to determine the coefficient of discharge (C_d) of an orifice. The experiment involves measuring the differential head and discharge rate with varying water levels in a tank. The orifice diameter, water heights, times, and discharges are measured and used to calculate the theoretical and actual velocities. From these, the C_d values are calculated at different discharges and the mean C_d is determined. Graphs are plotted between the differential head, gauge readings, and discharge to analyze the results.
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2020CEB005_DETERMINATION OF ORIFICE COEFFICIENTS..pdf
1. NAME POTNURO SAIDEEPAK
T)ePaRTMENT OF CIVu ENGINEERING
ENRoLLMENT No:
2020CEGoas
DETERMINATION OF ORIFICE COEFFICIENT
OBIECTIVE: To detewiue peniveuiolly the uodjeient d
Cothachan (co), (olheiect oVebaly(ci) cudejvusd-dbbanye
J au u peidd an He oiea Juall e a uala dnue
THECRY Orikce Cogfecieat uuag be shuud o» alas
Thelo-elecieut o Crubracken is tue nako btiuaiu tiucoentetroral
ua due ueua Ceubrukeru lAc) aud ke (ron-eciorual asua
o he Bilce Ao
. ad_el ak Veua_(etiachien
the uelheieuk elely a he who detauan he astuelveleity
bhe a vena terhraeien Ve aud heidead velaily
(ikuou (ruidoivg lesa)
CArchunlVeloily dk Veba Conbhadhan V
ideal Velbily
2gH
H beiug he head uen the ae,unih is Mauntaned
ok ceukeuk value iku khe dhelp lsuhnuory injleo inlo he
2. Thelodheieut o bilange he aho ddhueu hu nclual
dlinaduarge o he 8uliet aud du drd dikauee dvduarge
aelual dixlauge d he Jilice.
ideal dwuange
AoVo
APPARATUS:
he oxite has a
diamta e os ituch aud i
isalld 27 ithuy peu ke latiowd a
24 x3k x4 uige
pYexuk tauk. Watu u
nupplied iulo be kaunk through a
2 imer dia
peratd pipe towwiud b ke Jabtunaly 6inkey
uoiy aud extudad. vodueut he eutine deph d te lauk
AHaua il u alud "Slopedgd he diice wkunly hay a
***
hquau pMDM Aace a
uy Mldt tpudvral whhalld phieu
uud a 45° Jouol iLuay) eu he
renig
3. Delemanakion o (:
rihallh hu infao indo
Tokne tel he uatu Juual inhe taukoloruit chage
Luik diua ulao aud eullas beiug cqual The loeueut t
ud a he Veskiel Cobududty at daileuak rahity
e jch oud Rhudal GBduaty al dilut kalas
He y a paul 9age miukeed u bdyuel yoils
adusd muh o)
alaue ice
he j igud don a
uulety ve ulorg dämudaldrecthou
he Veua Gnkrachon aud in atd paekaes yrauiy
uihs a denanuand ctelanalon .
Thee-Vt aud yLt Wheae ty m he tilijubel aud
Veaical C8ordiuales of ay priuk Pin he jetouVeua laukiacta
Hence Ve- aud Ve
Quc
4yH
meaxug H,Xaud y epeuneulalyty lau be meoued
Jeleuivohia_o C
The oeluns drckoge waxed Jy a uuhie tauek into
ca e mauubly diuuld a miand nme
judnual, udn teutaud huad H, oun Hae duie ad tte lekcied
dnchanqe ou de mawud enpeuunally
Achual cinlauee weakuned pomuwaly
A29H
4. Delomiuahew d C
The toeftient of CoHhokion in obtained hrom Ca and
lebcty
i-e C aud C
let CPuiedex tuuw Iaud2
he fauke aud Veua
Cohaca lek he le in Atdy
Oud a a ot tuad H
+V2
Pa+V
t h -o (ahudphext pvenue)
W
Vi Ve muall M
Cbpmon V, a tauk Vey
Jouge 0 Cevupanud dte ke aua ojd
Vi
H+o- o+Vl
YLa2gt
Thits in he heovokal veleul Aclua velaeily Will e lus
than
Hns talu.
5. Obscrved dolahee
Wiameler ehe Bihee -
h inch
Co-oxdiat
e
Hetgktthedakr
C164)
Y Initial final D
Voloweof Time T
watn (ollte
RUH Head
No s)
62 13.9 8S 23-+46
4627hS
55-5 4 214 43 24040.7
60
60
96 1S 224 44
So 14-2 1 13-1 3-1 (7367
52 246S 0 60
60
S44
Sg4 I4 13-8 1- 31 I7347+
F3 25-S| 6-3 194 3-2 14428
60
60
orpoked Data
Ron HealfAchual FeonkroCoe Mean Velociky Mean Cael Mecu
HeadlAchual
No
RUH Mecun
dnhongel dindarg dischange Nali (o4 Value (othatieu |Valat
-volPA- Cc4)
424.473-26 6-90 0 44 0.914
401S |413-25 0 44 0-36 049 049%0S2 6-88
440 9 413.26 0 869 0 993 8ts
289. 4 44 89 0.s1S
54 284.4
4 41 0-70 |071 092 0-425 076
289.4 0-77
2488 4 41 0-702 O 413 676
6. Sample Calouaien
Premne Head cm
Co-Oxdinote dh XGueiy62:5(
(o-odiuat d yanis 13- Cm
Not y 62S
4yH 0.994
4X13-4X71
ia He Ovfte =
t27cm
fhea the Ovifce W4(23}-r20 tm
TReeical dchorge toyzH
26 X/2x981X7|Cml - 4?3.2? cw
Arhualwnwkvnge Vol)7 25t4S/so 421Scw
C 470-24 he -Cd. 0.9
CV 0.qa4
Overte od Taume
Srale
,Oviice
PortGage.
.
Tt
MealmingTank.
Scalt
Schematic Diagsa of he zpesimenlal seup for
1eTeRrUNATON OF CRIFICE o-EFFICIENTS
7. log log graph of differential head in Hg. h vs measured discharge, Q
0.0116
15.3
O.0114
11
0.0082
85
0.0084
0.007
25
0.0044
o00
Measured discharge, a(fe3/
8. log log graph between Hg Bauge reading vs (R1-R2)/T
0.C28
L022 5
