Лекции по гидрогазодинамике
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m < 0.6
ε = 0.57 +
0.043
1.1 − m
.
d
d
∆p = ρ g ∆H ,
v
Q = v S
50−213−80
“
d v
S = f d/v
Re = v d/ν Re > 10
3
S → 0.21
f = 0.21 ·v/d
v
0
= 10
d = 2 f = 1050 c
−1
Re = 1200
10 − 150
C 98 − 980
/
3
ρ =
3.4839 p
t + 273
.
/( K)
C
p
= 1.0005 + 1.1904 · 10
−4
t.
/( K)
λ = 0.37 · 10
−3
(t + 273)
0.748
.
c
µ = 0.544 · 10
−6
(t + 273)
0.62
.
2
/c
ν = (13.7 + 0.101 t)
p
0
p
· 10
−6
, t = 0 − 140
C;
ν = (6.7 + 0.1455 t)
p
0
p
· 10
−6
, t = 140 − 400
C.
p
0
= 98.07 .
10 − 100
C
/
3
ρ = 1005 − 0.0025 (t + 37)
2
,
ρ =
1005
0.99534 + 0.466 t · 10
−3
.
/( · K)
C
p
= 4.20511 − 0.1365 · 10
−2
t + 0.152341 · 10
−4
t
2
.
/( · K)
λ = 0.551444 + 0.2588 · 10
−2
t − 0.1278 · 10
−4
t
2
.
2
/c
ν = [exp [exp(33.22999 − 5.93043 · ln(t + 273))] − 0.87] · 10
−6
.
c
µ =
µ
0
f(T )
.
µ
0
= 0.00179 · c t = 0
C
f(T ) = 1 + 0.0337 t + 0.000221 t
2
t
C
0 ÷800
C
0 − 100
p V = 0.225 (i − 1.92 · 10
6
).
p = ; V =
3
/ ; i = /
100 − 300
C p
s
t
/
3
ρ =
p
s
10
3
[(432 + 0.488t − 0.282 10
−2
t
2
) (t + 273)]
.
/( · K)
C
p
= 1.62 + 0.77 · 10
−3
(t + 273) +
40.32
t + 273
+
+0.1076 · 10
−3
p
s
647
(t + 273)
3.5
+ 0.495 · 10
−12
p
3
s
647
(t + 273)
18
.
/( · K)
λ = 3.7 · 10
−6
(t + 273)
1.48
+ 1.37 · 10
−4
ρ
1
.25.
H · c/
2
µ = 2.235 · 10
−6
(t + 273)
1.5
(t + 1234)
.
T
s
, K p
s
,
T
s
=
1000
5
P
k=0
B
k
(ln p
s
)
k
,
ln p
s
=
1
X
k=−1
A
k
T
s
1000
!
k
+ A
2
ln T
s
.
k −1 0 1 2
A
k
−7.821541 82.86568 10.28003 −11.48776
k 0 1 2 3
B
k
· 10
3
−211.7187 −2.166050 0.1619692
B
4
· 10
5
4.899800
B
5
· 10
6
3.691725
/
3
ρ =
3500 p
t
C + 273.15
, p, .
/
i =
0.981 + 0.43
t
C
1000
− 0.125
t
C
1000
!
2
t
C.
C, λ , K
d, C, λ , K, d, C, λ , K,
3
/c
3
/c
50 44.79 0.0391 0.00987 400 60.31 0.0216 2.3970
75 47.45 0.0349 0.0287 450 61.35 0.0209 4.2593
100 49.46 0.0321 0.0614 500 62.28 0.0202 4.3242
125 51.07 0.0301 0.1108 600 63.91 0.0192 6.9993
150 52.42 0.0286 0.1794 700 65.32 0.0184 10.5173
200 54.62 0.0263 0.3837 800 66.58 0.0177 14.9648
250 56.40 0.0247 0.6921 900 67.70 0.0171 20.4295
300 57.90 0.0234 1.1206 1000 68.72 0.0166 26.4850
50 − 70
40 − 60
2.5 − 3.0
0.5 − 1.0
2.0 − 2.5
10 − 15
15 − 22
10 − 12
10 − 12
10
8 − 10
10 − 12
15 − 20
20
