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工程流体力学. Engineering Fluid Mechanics. 中南大学. 目录. 第 1 章 流体及其主要物理性质. 第 2 章 流体静力学. 第 3 章 流体动力学基础. 第 4 章 流动阻力和水头损失. 第 5 章 孔口、管嘴出流及有压管流. 第 6 章 明渠均匀流. 第 7 章 明渠水流的两种流态及其转换. 第二章 流体静力学. 第一节 流体静压强及其特性. 第二节 流体的平衡微分方程及其积分. 第三节 重力作用下的流体平衡. 第四节 流体压强的量测. 第五节 作用在平面上的流体静压力. 第六节 作用在曲面上的流体静压力.

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Engineering fluid mechanics

Engineering Fluid Mechanics


Engineering fluid mechanics

1

2

3

4

5

6

7


Engineering fluid mechanics

1


Engineering fluid mechanics

1.

2.

3.


Engineering fluid mechanics


Engineering fluid mechanics

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N/m2Pa


Engineering fluid mechanics

dP

dP

dA

dA

1.


Engineering fluid mechanics

2.

p


Engineering fluid mechanics


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x


Engineering fluid mechanics

1.

x

2.

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dU

dp

UUx,y,z

U


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p0U0

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Engineering fluid mechanics

z

-mg

z

0

x

y

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Ugz

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2.

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Engineering fluid mechanics

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0

0

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---

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Engineering fluid mechanics

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O

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ppapv


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A

A

pa

B

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A

B

O

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pa

pa

pa+gh

pa+gh

pa

pa

pa+gh1

pa+gh1

pa+g(h1+h2)

pa+g2R


Engineering fluid mechanics

N/m2PakN/m2kPa

mH2OmmHg

1atm=1.01325105 Pa=760 mmHg

1at= 1kgf/cm2=

98103 Pa


Engineering fluid mechanics

19m28m37m410m1at1234M2M4


Engineering fluid mechanics


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h

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H

B

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h

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p

1

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p

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(a)

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(b)

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h

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h

3

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A2

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Engineering fluid mechanics

p

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h

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0

h

N

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d

2

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p2Uh0h100mm

p1p2

h

11mm100mm


Engineering fluid mechanics

p09.8kPaA

49kPaB,

39.2kPa ; 3m

5m

A. 5kPa ; B. 49kPa ; C. 147kPa ; D. 205kPa


Engineering fluid mechanics

-0.5m,1.5m

1.5m


Engineering fluid mechanics


Engineering fluid mechanics

H

H

A


Engineering fluid mechanics

H

h

H

H

h

H

h


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Engineering fluid mechanics

x

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Engineering fluid mechanics

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Engineering fluid mechanics

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Engineering fluid mechanics

A

A


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Engineering fluid mechanics

1.2.

12

ACa


Engineering fluid mechanics

h

H


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dPz

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h

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dA

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Engineering fluid mechanics

  • x

z

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Ax A

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Ax

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Px

Ax

n


Engineering fluid mechanics

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z

y

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Ax

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Pz

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B

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Pz


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PxPyPz


Engineering fluid mechanics

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Engineering fluid mechanics

p0 > pa

p0 < pa

A

A

B

B

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ap0pa

bp0pa


Engineering fluid mechanics

AB

R=0.5m

H=2.5m , h=1.5m.


Engineering fluid mechanics

Pz

D0.6m1m

Pz


Engineering fluid mechanics

=450B=1CH=3P


Engineering fluid mechanics


Engineering fluid mechanics

R=0.5m,l=2m.

p=29.4kPa1

23

=120MPa

d=10mm,e=50cm.


Engineering fluid mechanics

1

20


Engineering fluid mechanics

3

Pz


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2

1

pa

Pz

2

1

1.Pz

2.12


Engineering fluid mechanics

2.4

2.8

2.12

2.17

2.18 ()

2.20


Engineering fluid mechanics

h1

h2

h1=1m1=800kg/m3h2=2m=60


Engineering fluid mechanics

h1

h2

h1=1m1=800kg/m3h2=2m=60


Engineering fluid mechanics

h1

F1

yD1

yD2

yD

F2

h2

F


Engineering fluid mechanics

2.4AB

pa

gh1

pa+gh1

gh2

gh3

pa+gh2

gh

gh1

gh

g(h-h2)

g(h+R)

g(h-h2)


Engineering fluid mechanics

2.8h=0.36mA,B1mA,BpA-pB

Ahh


Engineering fluid mechanics

2.12B=1.5mAL1 =2mL=2.5mT

1

2


Engineering fluid mechanics

2.17


Engineering fluid mechanics

B

30

2.18D=4m30B1m

P


Engineering fluid mechanics

2.7m

2.20R=0.2m0.8B=0.4mh=0.2mh=0.2mF

O


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