3 Sheet Questions and Answers Fluids2 Ahmedawad
-
Upload
ahmed-awad -
Category
Documents
-
view
13 -
download
1
description
Transcript of 3 Sheet Questions and Answers Fluids2 Ahmedawad
Assignment 3
L- Gasoline at 20"C (p - 680 Kg /m' ,y = 667A N /m') is pumped through 12 cm
pipeline L0 Km long at Q=75m3 /h. the inlet is fed by a pump at inlet pressure of24 atm. The exit is at standard atmospheric pressure and is 150 m higher.
Estimate the frictional head loss hrand compare it the with the velocity head ,L(These numbers are quite realiStic for fluid through long pipeline)
Z- Air I R=287 J/KgK,Cp=1005 I/Kg K ] flows steadily as shown in figure throughturbine that produces 25 Kw. For the shown inlet and exit conditions.Calculate:
. The exit velocityo The heat transferred
Yr=30m,/s
D =20cmPr=1Obar
tr=150?
v2=a ln/sDz=20cmPz=3bar
T:=3?
.)J- Air I R=287 l/Ke K, Cp=1005 f/Kg K ]
a compressors that produces 20 Kw.
Calculate:
. The exit velocity
. The heat transferred
flows steadily as shown
For the shown inlet and
in figure throughexit conditions.
Vr=10rn/sDr=1ilcm
Pr=3bar
tr=50?
zr=10m
Vz=? m/sDz=10nn
Pz=15bar
Tz=124?
Zz=ZOnt
--->
4- A hydroelectric power plant takes in 30m3/s of waterthrough its turbine anddischarge it to atmospheric atvz=Zm/s, the headpenstock system hr=20m. assuming turbine flow
Ioss in the turbine and
s.=I.06 estimate the power in
Datum
5- The pump figural delivers water (p=103Kg /m3) to a machine at section 2 whichis 7 m higher than the reservoir surface. The Iosses between 1 and 2 are given
by hr - K* where k=7,5(dimensionlessJ take cr=L.07.find the horse power
required for the pump if it is B0%o efficient.Pr=1bar:rbs
Zr=0m
Q-s0l/s Dz=10cm
Zz=7m
Pz=1bar
ru
Ain Shams UniversitY
Faculty of Engineering
New Program
ENGR 350 Fluid Mechanics IIAssignment 3
Presented to: Prof. El-S amafioudy
Presented by: Ahmed Hassan Ibrahim
P.MANF
Assignment 3
L- Gasoline at 20'C (p - 68O Kg /m3 ,y = 6670 N /m') is pumped through 1.2 cm
pipeline 10 Km long at Q=75m3 /h. the inlet is fed by a pump at inlet pressure of24 atm. The exit is at standard atmospheric pressure and is 150 m higher.
Estirnate the frictional head loss hr and compare it the with the velocity heacl L
[These numbers are quite realistic for fluid through long pipelineJ
i,r "$, -\
I
v"i..
lrt'"
-7tr7J \
@-
T.' 2
if:4.l
Vo.,=G:"A 1+Z ^ls
E.f. briwte,n \ &21"\*q + -*: r Zt: *- r Y*- \ z.*hrY 2.1
G-g-*L."'= ,r1Xa ? ri.+#]r-*so*hf6{1c.r Zx g.El 66-7o z3
hr
t/
\rt, 4r ,,r
= J 13.+x ,^ I
I r 5j":
hivql'
it53.iil
( r ,r+z)z/tug.rr]
2- Air [R=287 l/KgK, Cp=1005 l/KgK] flows steadily as shown in figure throughturbine that produces 25 Kw. For the shown inlet and exit conditions.Calculate:
o The exit velocity. The heat transferred
Vr=30m,/s
Dr=20crlPr=10bar
tr=1500c
Vz=? m,/s
Dr=20cm
P:=3barT:=30c
-->
lo" Se"J2 tiI IOW
l-J.-+_RTr
ti\ **e*Rr-
e\: rnjA, V*
i loxtoi \ r- , ,\\rbTm/^ +,* o'a') ( 3c 3 rto}/
- (* to 4',)
InlS,./
k'" \r -iYer\(*'u,.-J (
*V.
Vz =
(e"a? {s *zrs))
(s-24X
rn= (r0' \*".13\ I
t! e -.n
" t
=6 j. l4'a"f'. i
*!.€(,\Ll.s{ r*ri
2r17, 1 /:)J ()* hlu
-"b:aAY
In gffiffiuiUJ..i
- W. _VJ,,.,.- !3
- (25 x r#1
: r,^[tt- (t -f * X.),]. ,'.,!/"* (to":. r(zt3+r.z; * ---Q,:i= l, l(3 L(
tu,s ^(zrs* 3) " #)
\ 3h5.1 kwr3xt"? k^s
ta i.Q 1 $: { Jt-t"'1-s
i -<?? +( k ..l- _]
v uF'
+,1=(
Iv,.- t ylraci*J h<*\
* .,.rrtirr,r,fl
I- .1.r.',1 * r"r-.-i
.".,1
3- Air [R=287 J/KgK, Cp=1005 l/KSK] flows steadily as shown in figure througha compressors that produces 20 Kw. For the shown inlet and exit conditions.Calculate:
o The exit velocify. The heat transferred
Vr=1Om/sDr=10cur
Pt=3baltr=5OFc
zr='10m
V:=? nr/sD:=10cm
P:=15barT:=12ODc
Zz=ZOrn
Iot
3 X\b52 t1 ( 5o* z73i
"1oJ,1 ilo w
-e, -"A,v, .=RT, ''
{
t.l\JT
rY] rAtV.
=,4n)
lqT?
, \afn=
4.,,'
apPt,trrvrl ffisrtlb eQur.[i* 4 :
,i
'r::"r)
a - (-m* rCI*) = o .'15+l kioruir2o*zz3{ +
L,( tot': 'i' i::: i-*:f { {
'Ltq: "?*,j
\"tl I
1t!,i l'*il
)
KWKl ,/sL/
tu{
)^ (+, u,')^ (,0) = (fffu;^ (q l, il'i * v,
= 2.43 r'alsSJto= r g(o.t\'^ lo
2E? ( so+ LT3'l "t t
c ,2 5 4\ kqt:
86.N6"1r:LV,
h+
613dT 3
?3K
1'/ - . ii t
rl2 - -\ i r
#- *\L)z - \h +
q ^r)l::* * J-'i,lf
,*LjJ-:* * :.r!.r
4- A hydroelectric power plant takes in 30m3/s of water through its turbine and
discharge it to atmospheric atvz=Zm/s, the head loss in the turbine and
penstock system hr=Z0m. assttming turbine flow a=L'06 estimate the power in
MW extracted bY turbine'
el L)"L
B, E be{w"un
-g- + {.V" + ZlY '3
i
P^ * l..-Q j:;9- + ro o
X zx 5'6i
Pn(vLtltt,*Y*
..4
-D+g- * ? =4-1
v
+ hf t l,r
---; h : loc ^xl, D6 X l*-.,
zt t.'{rL*
73.?r rn ,/
*/
P"** at t*rbi** = X C! h t
= (**'4, t-tr) ( 3 o)(1xl06
r lE)e3. +323" q3 A4W
5- The pump figural delivers water (p=103K9 /m=) to a machine at section 2 whichis 7 m higher than the reservoir surface. The losses .between 1 and 2 are given
,r2by hr - K:- where k=7.5(dimensionless) take a=1.07. find the horse power
?o
required for the pump if it is B0% efficient.
Ielld-T]'l
D:=1t)cm
Zi-7nPr=1bar
G-A- TT*{ (o.,)'
3r \
b et weetr
{v,'_ _L
-L'!
,/
\ &,L2 -'- A *""Vi* rZz-hp +hFt-1 -T- *_2T t\J]J--f- +
YI
hf= K*V: =7 u-( (-t-sr)i"
z x t,N IIt,4 q l"nzt
b*k f o B,E,O=
hp =
lx lo5Tc;Tq. rtr
* t.oJ x(.3d62- * ? -h,, *i5*\* *-
"*g.8t71. Bg S rn
d"\ =lpPower XQ hprq\^rr?- P {}vrf,{-
t -\l^-- ..\( su { ro:l)\ r J'i-1";ttX ffi*."h.,. - =
(e ,t,x rol,?,''t b' x
! ?. tcb KVil
l't. t35 hp
Pr=1bar abs
Zr=0m
orlp*t