初一下册期末试卷-南阳人事

实验3
附页1
L=
d
i
=
NO.
Δ pkPa
t
1

℃
ρ
t1
(kgm)
t2

℃
t
w

℃
t
m

℃
ρ
m
(kgm)
λ
m
(Wm*K)
c
pm
(Jkg*K)
μ
m
(Pa*s)
(t
2
-t1
)
℃
Δt
m

℃
V
t0
(m
3
h)
V
m
(m
3
h)
u
m(ms)
W
i
(kgs)
ΦW
Re
Nu
Pr< br>NuPr
0.4
lg(Re)
lg(NuPr
0.4
)
3
3
1.10E+00
2.80E-02
1
1.18
24 .7
1.181
56.9
96.8
40.8
1.121
0. 027
1.01E+03
m
m
2
1.7
26.7
1 .174
57.3
96.8
42
1.116
0.027
1. 01E+03
（换热段长度）
（内管内径）
3
2.19
28.51.166
57.5
96.8
43
1.113
0.027
1.01E+03
4
2.7
30.4
1.159
58.1
96.9
44.25
1.108
0.027
1.01E+03
53.18
31.8
1.154
58.4
97
45.1
1 .105
0.027
1.01E+03
1.9250E-051.9304E-051 .9351E-051.9410E-051.9450E-05
32.2
56
20. 519
21.629
0.273
6.74E-03
218.387
445.473
41.796
0.718
47.719
2.649
1.679
30.6
54.8
25.175
26.460
0.334
8.20E-03
252.755
47.667
541.017
49.432
0.720
56.375
2.733
1.751
29
53.8
29.011
30.406
0.384
9.40E-03
274.524
52.735
618.528
54.688
0.722
62.308
2.791
1.795
27.7
52.65
32.619
34.108
0.431
1.05E-02
292.825
57.479
688.625
59.608
0.724
67.831
2.838
1.831
26.6
51.9
35.750
37.309
0.471
1.15E-02
306.754
61.083
749.669
63.346
0.725
72.025
2.875
1.857
h
i
(Wm
2
*K)40.303

实验3
附页2
由图得到：
m=0.7904
A=0.3867