This presentation is the property of its rightful owner.
Sponsored Links
1 / 23

第 五章 管段流量、管径和水头损失 PowerPoint PPT Presentation


  • 37 Views
  • Uploaded on
  • Presentation posted in: General

第 五章 管段流量、管径和水头损失. 各管段流量计算的目的: 以选取各个 管段管径 及 进行系统的水力计算。而要进行各管段的流量计算,需先确定各管段的沿线流量和节点流量。. 一、沿线流量. 干管配水情况如图 5 - 1 所示,假定在管线上,沿线配出的流量有分布较多的小用水量 q 1 ′、 q 2 ′……等,也有少数大用水量的集中流量 Q 1 、 Q 2 ……等。. 由于沿线所接用户很多,而且用水量变化也较大,这样复杂多变的配水情况通常采用简化方法 —— 比流量法来表现:. (一)长度比流量法.

Download Presentation

第 五章 管段流量、管径和水头损失

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


5896615

5-1q1q2Q1Q2

q1q2qs


5896615

5-1

5-3


5896615

(L/s)

(L/s)

(5-1)

L/sm

(m)

Ql

Ql= qsL (L/s) (5-2)

(m)

(Q)qsqsL(5-1)qsL =QQi


5896615

  • L = L()

  • L =0.5 L()

  • L = 0()


5896615

q1q2qmb

(L/sm2) (5-3)

(m2)

5-2(a)(b)

qmbQy


5896615

Qy= qmb (L/s) (5-4)

(m2)

Qyqmb(5-3)qmb =QQi

5-3(a)


5896615

Qj5-3(b)

Qj7-10(a)Qj

Qj = aQl (L/s) (5-5)

a0.50.58a0.5a0.58a =0.5

(qn)

(L/s) (5-6)

25


5896615

5-2

(a)(b)


5896615

5-4

(L/s) (5-7)

(5-7)

qn= Ql/2 (L/s) (5-8)

Ql (L/s) (5-9)

5-1284.7 L/s189.2 L/s(m)5-54-51-22-3(1)(2)(3)


5896615

5-4


5896615

5-5


5896615

= 4600m

5-1

5-2


5896615

5-1

5-2


5896615

()

(Q)Q=0

5-6


5896615

5-7

(1)

(2)

(3)Q=0

4:

Q = q04q41q45q47q4=0

q04q4q41q45q47

17 528639


5896615

5-6

0q1q2Q1Q2Q3Q4Q5(5-9)5-3

5-3


5896615

5-7

545q455q52q58q56q5

Q = q45q52q58q56q5=0


5896615

:

(m3/s)

(m)

(5-10)

(m/s)

:

,2.53.0ms;

0.6 m/s

ve 5-4


5896615

7-15


5896615

(5mH2Okm):

d =100300mmve=0.61.1m/s

d =350600mmve =1.11.6 m/s

d =6001000mmve =1.62.1 m/s

7-6

d400mmV1.0m/sd350mmV1.0 m/s

7-6


5896615

7-5


5896615

34

1L/sm/s


5896615

5-6


  • Login