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明渠2022第一次期中考

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2022
10
20
明渠期中
CHINCH 2
[(]
品
Re =^
^∵ ⽔的密度 1 V =流速 D :
,
管之直徑 , M : 黏滯係封
[ I)
QIT
Fr =
ga
()
D
⼆早
(ψ ]
A:
7
a:
流量 , T 仁冰⾯ g : 動加速度 1 A ⾯積
⾯積 , Ti ⽔靦
”
E= y+
6
”
)
3
β=
g
,
⽔深和速度⽔頭之合
Jacy) do
的A
c⻔
U
=
"
1 S hkay ody
B
0
Sucy) dA
=
时
BH
⽄
答 ( ; yi ↑ = h = kxhimlsx
呂
6
=
"
β=
fudA
h
=
Ck *hij ^
α=
⼆
qk*hsBb
=
3 A
( 可kxb "
qBdy ]
3
2
1
.
% "
S。 ckx dAy
j
o
"
。
40KA hl cBh )
A
× 5649
"
Su3 dA
×^J my
k
=
=
0
[ 3]
×
10 ( k * yYojda
KF' xBXy 4 h
=
可
]
02085
仪
3
k*
=
3A
k
S hBdhy
。
*
h
3
" Bh
B
=
8
;Y
3
G
多 4S
2
0
了
品 hBb
=
1
.
0
(
X
216
[ l]
2
v,
1. 8+
~2
=
⇒ 0. 5 +
1 . 3 +
=
19 、 62
-
19 62
v
⼜
Ecy
+
.
-
iq = 2 、 5
∴,
==
620
19
,
<
Ec
=
v
1
=
=
8=
.
J EL = 0 . 41 m
仪
( 2)
于
÷ vy
=
^
,
-
F ≈ zryt
=
iryz
3
F = 0 q( v1
-
ryz 2
≡ x 9810 × 1 8
-
"
,
=
627 n n 5
.
/
β
^
m
-
=
-
02 )
CV
f 1 - V 2]
z × 9810 × 1 32
.
6 、 2 nnKN
哭
-
2500 C O 53 )
号
,
1.
3 V=
39
,
V
A
2
=
Bq
8
=
BY
== q
1
.
2
Y
)
q
⼆号⼆号
=
α
y0 = (
j
)
(
”2. 5 =
5
”
:
滋
"
)
ig " = A y+ (
y
+
( 2 55 )
=
”
=
19 . 62
"3
.
Y+
ozs
Y 0 = 136
2
2
⇒ 49 05 AZ= YA + 2251 ⼜ ∵ A = By = 3 Y
.
3
⇒ 441 ψ 5 y ^= dy + 225 ⇒ Y = 2125 m
10 89 的
.
C3 ]
Fr |=
.
225 B 3
9 81 × ( 3 × 2 r5 )
.
Frz
=
"
=
0 . 47
.
25
x δ|× ( 3 × 0 89 )
.
3
=
1 90
,
仪
K
哭
③= 6 . 5 = UA
∴
Vj
=
6,5
/ 4
2.
=
/4 q 3
δ2 = 6 , 5
12 + 7 ) x
. 341
1 . 74
=
19 62
.
±
EL
=
0 . 05
以仪
1 . 45 + . 25 x
19 621
,
+ EL
.
2,n 1
=
1 32
,
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