Bai Tap Thuy Luc 4971

8/10/2019 Bai Tap Thuy Luc 4971

1/9

Bi Tp Nhm Mn: Thy LcBi 6-3 Bm ng c thy lc

Cho N1 = 300 kw 03.0=

L = 1500 m Q = 0.2 m3

/s = !00 m = 0.! m1. "#nh$ N%2. "#nh$ &1' &2

()*)1.&h+ng t,-nh Bcnl) cho mt ct 11 4 22 mt ch6n 00 7

21

2

2

2

2

2

2

1

1

1

122

+++=++ tbhg

VPZ

g

VPZ

17

",ong 89 $ :1= :2= 0

;1= ;2= 0121 ==

"< 17 y ,>$g

v

D

lp

2..

2

=

;?) 03'0= ' l=1500 m' = 0'! m' Q= 0'2 m3/s

@gD

Q

D

lhh dtb

..

.A..

!2

2

21 ==

= 75!'1!A1'B.!'0.

2'0.A

.!'0

1500

.03'0 !2

2

m= "n thDt cEng sDt t,ong 8+Fng Gng

"> c9$ Nw= .Q. ZgVP

++2

2

7

;?)$ = A10N/m3' = 0.!m

Q = 0.2 m3/s ' P

= 1!.5!m

Nhm:9 Trang$ 1

N2

&2&1

N1

00

221 1

L'


2/9

Bi Tp Nhm Mn: Thy Lc

: = 0

;Hy $ Nw= . Q .

++ Z

g

VP

2

2

=

++ Z

gD

QPQ

!2

2A..

Nw = A10 . 0'2

+ A1'B.!'0.1!'3

2'0.A5!.1! !2

2

@Nw =2AIA1%7 = 2A'IA1Jw72. "#nh K sDt &1Mo m tOo ,> tO) 8P 8+Fng Gng 4 K sDt &2t,+?c 8ng c thylc cG) 8+Fng Gng.

"> c9 cEng sDt c> 8ng c thy lc$N2= N1R Nw

= 300 R 2A'IA1 = 2I1'21Jw7CEng sDt c> m$

++= Zg

VPQN2

.2

11

=

gD

Q

Q

NP

!2

2

11

.A

..

;?) := 0

7/10.5'1A1'B.!'0.1!'3

2'0.A

2'0.BA10

10.3.BA10 2S

!2

25

mN=

=

CEng sDt c> 8ng c thy lc$

++= Z

g

VPQN

2.

21

2

?) T=07

=

gD

Q

Q

NP

!2

2

22

.A

..

7/10.35'1A1'B.!'0.1!'3

2'0.A

2'0.BA10

2I121B.BA10 2S

!2

2

mN=

=

BI 6.6L=20m U = 150mm = 2 U = 0'03

Nhm:9 Trang$ 2

B?

z

h

11

3

3

22

0 0


3/9

Bi Tp Nhm Mn: Thy Lcl = 12m U M = 150mm r = S U c = 0'2 ' = 0'030Q= V U &ck= SmW2X: =V()*)$

Bi Gii&h+ng t,-nh Bcnl) cho mt ct 1 1 4 2 R 2

1

0U0U0U

71

2121

2121

21222211

222

211

====

====

+++=++

a

tbg

Vp

g

VP

PPP

VVzzz

hzz

g..

Q.A.I

g

QA

L

21g2;

L

21t !2

2

!2

22

77h

=++=+=

!15'0

15003'0

L.

32121

==

=+=+

"h>y 4o 17 t> 8+Yc

72h:g.

Q.A.I21tN !2

2

==

&h+ng t,-nh Bcnl) cho mt ct 22 4 33 mt ch6n 007

T2=0 U T3= hZT = 2ZT U 2= > U 2=02

!

3 d

QVV

== 132 ==

gd

Q

gd

Q

dlcrtbh !22

!2

2AA

32 .S'A7 =++= "h>y 4o 37 t> 8+Yc$

3223

2332

++++= tbg

VPPhzh

gd

Q

gd

QPPZa !2

2

!2

23 AA S'A2

+++=

7S'A12S !22

A +++= gd

QZ

7!S'B! !22

A

gd

QZ

+=

()*) 27 4 !7 ?) M==0'15m7 t> 8+Yc $

Q=0'03A! m3/s7 = 3A'! l/s7 :=1'I m

Bi 6.7:

Nhm:9 Trang$ 3

73532233222233

222

+++=++ tbg

Vp

g

VPhzZ


4/9


2

1 10 0

2

h

&>

[ cho$

+

( ) ( )

( )

( )

0 0 ! 2

3

1

S0 1

20 $ 2 2.10

0' B2 0' B2.BA10 B025' 2

Q v ph l s

t C St m s

N m

= =

= = =

= = =

+ +Fng Gng$ L = 5m U M = 35mm+ 0 00'1 U 10 U 1c dmm h h h m = = =

"#nh$+& tO) mt ct 4o c> m.+ ;?) 0 !A0 U 1 10 U 0'A5t C St = = = = th- &=V

Bi gii:

. &h+ng t,-nh cnl) cho mt ct 11 4 22$2 2

1 1 2 21 1 2 2 1 2

2 2 tb

P v P vZ Z h

g g

+ + = + + + 17

;?)$

1 2 1 2 2

!U 0U 0U

QZ h Z v v

d= = = =

"> c9$3

1 !

. !. !.10

\ 1A2 2320. . .0' 035.2.10

v D Q

d

= = = = < l4 M]ng ch*y tPng @^1= ^2= 2.

2 2

1 2 2 !

A. . . .

2 . .tb c d

l v l Qh h h

d g d d g

= + = + = +

;?)$1

S!0'35

\= =

Nhm:9 Trang$ !


5/9

Bi Tp Nhm Mn: Thy Lc"h>y 4o 17 t> 8+Yc$

2

1 22 1 22 !

1 1

3 2 3 2

22 ! 2 !

1 1

A

. .

2.A.10 7 5 A.10 70' 35. . 1

.0'0357 .B'A1 0'035 .0'0357 .B'A1

tb

a ck

P P Qh h

d g

P P P

+ = + +

= = +

= 2'1 m ct MP7

B025' 2

2'1. 0'1B 7BA000

ckP at= =

!. Jh) t = A00C" 1St= U 0'A5=3

!

. ! !.103S!0 2320

.0' 035.10

e

v d QR

d

= = = = >

@ l4 ch*y ,G) ^1= ^2= 1.o \ nh_ n`n t,Ong thK) M]ng ch*y l4 ch*y ,G) th4nh t,n thy lc.

0'25 0'25

0' 31S! 0' 31S!0' 0!

3!S0e

R = = =

Nh+ Hy$2 2

22 2 ! 2 !

A A. . .a

P P Q l Qh

d g d d g

= +

2

22 !

A.

Q lh

d g d

= +

3 2

2 !

A10 7 51 1 0' 0!.

.0' 0357 .B' A1 0' 035

= +

0' S2dP

= m ct MP7

;?) 32 0' A5.BA10 A33A' 5 7N

m = =

0' S2.A33A' 5 0' 05 70' BA.105

dP at = =

BI:6-#.

Nhm:9 Trang$ 5


6/9


1 2

2

0

1

0

;)at h+ng t,-nh Bcnl) cho cKc mt ct 11' 22 mt ch6n XX7.

21

2

22

22

2

11

11

22 +++=++ tb

dd

hg

vpz

g

vpz

",ong 89$ T1= T2= 0

1= 2= =A3'2

710.2

150.

10.50

23

3

==

S

Q

m/s7.

;- 8+Fng Gng c9 ch)[ M4) l?n n`n t> c9 thb _ > tn thDt cdc .

g

v

D

lhh dtb

2..2

21 ==

e Jh) t = 100C t,> )b 8f h-nh SA t,>ng 1I1B" thy lc 4 mKy thy lc7 t> c9$

B'0

710.373

1

2!

2

1

=

==

s

m

s

cm

7AA2BBA10.B'031 m

N==

y ,>$ 23201!1510.3

10.150.A3'2.\

!

3

1


7/9


AB!'0

710.25'1725'1

2

2!

2

2

=

==

s

m

s

cm

7AII0BA10.AB!'0 32 mN==

y ,>$ 232033BS10.25'1

10.150.A3'2.\

!

3

2 >===

Dv

L4 M]ng ch*y ,G)$ 121 ===

o \2nh_ n`n t,Ong thK) M]ng ch*y l4 ch*y ,G) th4nh t,n thy lc.

0!1'0733BS

31S!'0

\

31S!'025'025'0

2

===

Nh+ Hy$ AI'55IA1'B.2A3'2

.10.150

10.5.0!1'02..

2

3

32

2121 =====

g

v

D

lhh

ppdtb

d m ct

MP.

21 ppp = = 55I'AI . AII0 = !' . 10SN/m27

e Jh) t = 300C t,> )b 8f t> c9$

AAB'0

710.5'075'0

3

2!

2

3

=

==

s

m

s

cm

7AI21BA10.AAB'033 m

N==

y ,>$ 2320A!B010.5'0

10.150.A3'2.\

!

3

3 >===

Dv

L4 M]ng ch*y ,G)$ 121 ===

o \3nh_ n`n t,Ong thK) M]ng ch*y l4 ch*y ,G) th4nh t,n thy lc.

033'0

7A!B0

31S!'0

\

31S!'025'025'0

2

===

Nh+ Hy$ !!BA1'B.2

A3'2.

10.150

10.5.033'0

2..

2

3

32

2121 =====

g

v

D

lhh

ppdtb

d

m ct MP.

21 ppp = = !! . AI21 = 3' . 10SN/m27

B4) !15$

Nhm:9 Trang$ I


8/9


Cho$ & =IS0mmWg='A.10!N/m27to= 200C 2I3= T 0J = 0'2m ' B5'0=

()*)1."#nh l+ l+Yng khEng kh# kh) ct K c> ,+Y) Mng t,ong chn khEng kah=0'25m7 2/A00 mNr=

Chin mt ct 11' 22 nh+ h-nh j chin mt hng 8) > t,dc Ot' l4m mtch6n. "> c9 h+ng t,-nh Bcnl) tO) 2 mt ct 89 l4$

=++g

VPZ

2

2

11

11

21

2

22

22

2 +++ !h

g

VPZ

17

"> c9$ :1 = :2 =0121 ==

;1= 0Ww12= 0 8oOn M]ng ch*y ngn khEng c9 ch+?ng ngO) Ht.

17g

VPPa

2

2

22 +=

2PPh ack

=

cka h

PP=

2 27

"ha 27 4o 7 t> 8+Yc$g

Vh

PPck

a

2

2

22 +=

gVhck2

2

2= 37

"> c9 K sDt chn khEng tO) ct n+?c h*) ng K sDt khEng kh#.&ck= &kk kkkkrck hh = .

;?)$ ( )3!

>kk m/NA2'11

2B3.2I'2B.I50

10.A'B.IS0

\"

&===

( )m2'1SB!'11

A000.25'0

.hh

kk

,ckkk ==

=

Nhm:9 Trang$ A

1

1h


9/9

Bi Tp Nhm Mn: Thy Lc"ha 4o 37 t> 8+Yc$

7s/mS2'5I1I5.A1'B.2h.g.2 kk2 ===

7s/mA'1!

5'S2'5I.2'0.1!'3.

!

M.Q 3

2

2

2

ttkk ==

=

;?) ( smQ "kk /I1'1B5'0.A'1B5'0 3=== 2' ;?) Qkktt= 1'A m3/s7' "= 2I3 R 20 = 2530k ;4 hkk= 1S'2 m7 khEng kh# &kk= !05mmWg7 = 0'5!.105N/m27

;?) ( )35

kk m/N3'I2AI.253

10.5!'0.A1'B

\"

&.g.g ====

Ct K c> ,+Y l4$

hck,= hckkk. ( ) ( )mm15!m15!'0A0003'I

.2'1SB,

kk ===

Nhm:9 Trang$

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Bai Tap Thuy Luc 4971