1-йопыт
47.551
54.5
55.555.5
55 tсх:= 54.5
54.5
5454
54
54
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Исходныеданные: |
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R1o := 3.34 10- 3 |
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b := 0.205 |
м |
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I1 := 120 |
А |
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Вт |
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tж := 23 |
C |
o |
Cp := 2 |
2 |
4 |
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м |
K |
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Tж := 273.15 + tж |
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Вт |
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- 2 |
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λ := |
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м К |
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g:= 9.81 |
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2.59 10 |
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Tсх:= 273.15 + tсх |
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- 6 |
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ν := |
15.06 10 |
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Pr := 0.703 |
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0.060 |
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24.5 |
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28 |
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0.140 |
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31.5 |
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0.240 |
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32.5 |
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0.340 |
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32.5 |
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0.440 |
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32 |
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0.54 |
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Co |
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t |
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:= t |
сх |
- t |
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= |
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x:= |
0.64 |
м |
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31.5 |
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0.74 |
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31.5 |
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0.94 |
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31 |
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1.14 |
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31 |
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31 |
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1.340 |
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31 |
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1.440 |
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Rt0 :=
qхи:=
1 + (tсх -
Tсх
Cp 100
20)1.088 10- 3
4 |
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Tж |
4 |
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- |
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= |
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100 |
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1.031.034
1.0381.039
1.039
=1.038
1.038
1.038
1.037
1.037
1.037
1.037
57.58266.965
76.657
79.48479.484
78.067
76.657
76.657
75.253
75.253
75.253
75.253
Вт м2
qхэл:=
qхк
I12 R1o
b
:= qхэл
Rt0 =
- qхи
241.634242.528
243.421
243.676243.676
243.549
243.421
243.421
243.293
243.293
243.293
243.293
184.053175.563
166.764164.192
164.192
=165.481
166.764
166.764
168.04
168.04
168.04
168.04
Вт м2
Вт м2
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7.512 |
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17.403 |
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6.27 |
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33.892 |
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5.294 |
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49.057 |
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5.052 |
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66.321 |
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5.052 |
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85.827 |
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q |
хк |
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5.171 |
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Вт |
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α := |
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(αх x) |
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107.818 |
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х |
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t |
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5.294 |
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2 |
К |
Nu |
жх1 |
:= |
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λ |
130.819 |
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м |
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5.294 |
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151.26 |
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5.421 |
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196.734 |
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5.421 |
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238.592 |
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5.421 |
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280.451 |
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5.421 |
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301.38 |
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- 3 |
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3.119 10 |
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- 3 |
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3.085 10 |
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- 3 |
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3.052 10 |
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- 3 |
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3.043 10 |
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- 3 |
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3.043 10 |
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- 3 |
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1 |
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β:= |
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= |
3.047 10 |
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T |
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- 3 |
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сх |
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3.052 10 |
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- 3 |
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3.052 10 |
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- 3 |
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3.057 10 |
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- 3 |
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3.057 10 |
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- 3 |
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3.057 10 |
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- 3 |
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3.057 10 |
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7 |
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6 |
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1.052 10 |
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7.392 |
10 |
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8 |
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7 |
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1.336 10 |
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9.391 |
10 |
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8 |
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4.731 |
8 |
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6.73 10 |
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10 |
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9 |
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1.345 |
9 |
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1.913 10 |
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10 |
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4.147 109 |
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2.915 |
109 |
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9 |
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9 |
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3 |
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5.389 |
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Gr |
жк |
:= g β |
t |
x |
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= |
7.666 10 |
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Ra := Gr Pr = |
10 |
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х |
2 |
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1.276 |
10 |
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1 |
жк |
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8.972 |
9 |
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ν |
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10 |
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10 |
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1010 |
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1.387 1010 |
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1.973 |
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4.044 |
10 |
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10 |
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10 |
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2.843 10 |
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7.213 |
10 |
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10 |
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10 |
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5.07 10 |
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1.171 |
11 |
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10 |
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10 |
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8.235 10 |
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1.454 |
11 |
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11 |
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10 |
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1.022 10 |
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56 |
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54 |
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52 |
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tсх |
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50 |
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48 |
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460 |
0.5 |
1 |
1.5 |
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x |
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8 |
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7 |
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αх |
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6 |
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5 0 |
0.5 |
1 |
1.5 |
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x |
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2-йопыт |
Исходныеданные: |
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Co |
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tж := 24 |
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I2 := 180 |
А |
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73 |
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49 |
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79.5 |
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55.5 |
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86 |
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62 |
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88.5 |
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64.5 |
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88 |
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64 |
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86.5 |
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62.5 |
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tсх:= |
86 |
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tх:= tсх - tж = |
62 |
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85 |
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61 |
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84 |
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60 |
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83 |
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59 |
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83 |
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59 |
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83.5 |
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59.5 |
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558.323 |
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562.056 |
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565.789 |
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567.225 |
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2 R |
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566.938 |
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I |
1o |
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566.076 |
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Вт |
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qхэл:= |
2 |
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Rt0 |
= |
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b |
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565.789 |
м2 |
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565.215 |
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564.64 |
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564.066 |
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564.066 |
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564.353 |
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1.058 |
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1.065 |
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1.072 |
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1.075 |
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1.074 |
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Co |
Rt0 := 1 + (tсх - 20)1.088 10- 3 |
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1.072 |
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= |
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1.072 |
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1.071 |
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1.07 |
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1.069 |
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1.069 |
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1.069 |
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57.582 |
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66.965 |
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76.657 |
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79.484 |
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4 |
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4 |
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79.484 |
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Tсх |
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Tж |
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78.067 |
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qхи:= |
Cp |
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- |
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= |
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||||||||
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100 |
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100 |
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76.657 |
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76.657 |
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75.253 |
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75.253 |
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75.253 |
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75.253 |
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В
м
qхк :=
Nuжх2
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500.741 |
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495.091 |
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489.132 |
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487.741 |
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487.454 |
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488.009 |
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qхэл - qхи = |
489.132 |
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488.558 |
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489.387 |
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488.813 |
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488.813 |
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489.1 |
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23.674 |
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48.219 |
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73.105 |
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99.268 |
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129.392 |
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(αх x) |
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162.795 |
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:= |
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= |
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λ |
194.946 |
||||
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228.833 |
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296.026 |
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|
364.666 |
||
|
|
|
428.643 |
|
|
|
|
|
|
|
|
|
|
|
457.029 |
|
Вт м2
αх:=
β:= |
1 |
|
Tсх |
||
|
|
|
|
10.219 |
||
|
|
|
|
8.921 |
|
|
|
|
|
|
|
|
|
|
|
7.889 |
|
|
|
|
|
7.562 |
|
|
|
|
|
|
|
|
|
|
|
7.616 |
|
q |
хк |
|
|
7.808 |
|
|
= |
|
|
||
|
tх |
7.889 |
|||
|
|
|
|||
|
|
|
|
8.009 |
|
|
|
|
|
8.156 |
|
|
|
|
|
|
|
|
|
|
|
8.285 |
|
|
|
|
|
8.285 |
|
|
|
|
|
|
|
|
|
|
|
8.22 |
|
|
|
- 3 |
|
|
3.119 |
10 |
|
|
|
- 3 |
|
|
3.085 |
10 |
|
|
3.052 |
- 3 |
|
|
10 |
|
|
|
3.043 |
- 3 |
|
|
10 |
|
|
|
|
||
|
3.043 |
10- 3 |
|
|
|
10- 3 |
|
|
3.047 |
|
|
= |
|
10- 3 |
|
|
3.052 |
|
|
|
|
10- 3 |
|
|
3.052 |
|
|
|
3.057 |
- 3 |
|
|
10 |
|
|
|
3.057 |
- 3 |
|
|
10 |
|
|
|
3.057 |
- 3 |
|
|
10 |
|
|
|
3.057 |
- 3 |
|
|
10 |
|
Вт
м2 К
|
|
|
|
|
7 |
|
|
|
|
1.442 107 |
|
|
|
|
|
|
|
2.052 10 |
|
|
|
||||
|
|
|
|
|
8 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.832 108 |
|
||||
|
|
|
|
|
2.606 10 |
|
|
|
||||
|
|
|
|
|
9 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
9.231 108 |
|
||||
|
|
|
|
|
1.313 10 |
|
|
|
||||
|
|
|
|
|
9 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2.625 109 |
|
||||
|
|
|
|
|
3.733 10 |
|
|
|
||||
|
|
|
|
|
9 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
5.688 109 |
|
||||
|
|
|
|
|
8.091 10 |
|
|
|
||||
|
|
3 |
|
|
1.496 1010 |
|
|
|
|
1.051 |
10 |
|
Grжк:= g β |
tх |
x |
|
= |
|
|
|
|
|
10 |
|
|
2 |
10 |
Ra := Gr |
Pr = |
|
|
|
||||||
|
|
ν |
|
|
2.49 10 |
|
2 |
жк |
|
|
10 |
|
|
|
|
|
1.751 |
||||||||
|
|
|
|
|
|
|
|
|
10 |
|||
|
|
|
|
10 |
|
|
|
|
1010 |
|
||
|
|
|
|
|
3.849 10 |
|
|
|
|
2.706 |
|
|
|
|
|
|
|
7.89 1010 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
5.546 |
10 |
|||
|
|
|
|
|
|
|
|
|
|
10 |
|
|
|
|
|
|
1.407 1011 |
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
9.893 |
10 |
|||
|
|
|
|
|
|
|
|
|
|
10 |
|
|
|
|
|
|
2.286 1011 |
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
1.607 |
11 |
|||
|
|
|
|
|
|
|
|
|
|
10 |
|
|
|
|
|
|
2.836 1011 |
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
1.994 |
11 |
|||
|
|
|
|
|
|
|
|
|
|
10 |
|
|
90 |
|
|
|
|
85 |
|
|
|
tсх |
80 |
|
|
|
|
75 |
|
|
|
|
700 |
0.5 |
1 |
1.5 |
|
|
|
x |
|
|
|
11 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
10 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
αх |
9 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
8 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
7 0 |
|
|
|
|
0.5 |
|
|
|
|
|
|
|
1 |
1.5 |
||
|
|
|
|
|
|
|
|
|
|
|
x |
|
|
|
|
|
|
|
|
Оценка погрешности |
|
|
|
|
|
|
|
|
|
|
|||||||
|
Ламинарныйрежим |
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
nжх |
|
|
εt := 1 |
nжх:= |
|
|
|
|
||||
|
Nuжх = c (Gr Pr) |
εt |
|
|
0.25 |
c := |
0.60 |
|||||||||||
|
Gr*Pr=10^3 -10^9 |
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
|
7 |
|
|
|
|
|
|
nжх |
|
|
|
33.74 |
|
||
Gr |
|
:= |
|
10 |
|
|
|
Nu |
|
:= c Gr |
|
= |
|
|||||
Pr1 |
|
|
|
жх3 |
Pr1 |
ε |
t |
|
|
|
|
|||||||
|
|
|
9 |
|
|
|
|
|
|
|
|
106.697 |
|
|||||
|
|
|
|
10 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Турбулентный режим |
|
|
|
|
|
|
|
|
|
|
|
|
||||||
εt := 1 |
|
nжх:= 1 |
|
c := 0.15 |
|
|
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
3 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
10 |
|
|
|
|
|
n |
жх ε |
|
|
|
587.23 |
|
|
Gr |
Pr2 |
:= |
|
6 10 |
|
|
Nu |
жх4 |
:= c Gr |
Pr2 |
t |
= |
|
|
|
|
||
|
|
|
12 |
|
|
|
|
|
|
|
3 |
|||||||
|
|
|
|
10 |
|
|
|
|
|
|
|
|
|
|
|
1.5 10 |
|
8 |
|
|
|
ln(Nuжх3)7 |
|
|
|
ln(Nuжх4)6 |
|
|
|
ln(Nuжх1)5 |
|
|
|
ln(Nuжх2)4 |
|
|
|
3 |
|
|
|
215 |
20 |
25 |
30 |
|
ln(GrPr1),ln(GrPr2),ln(Ra1),ln(Ra2) |
|