實驗及數(shù)據(jù)傳熱學作業(yè)參

R

0.6097(m qtf1tf2181045.9225 qA45.92252.83385.749

tf1q1q

1845.922517.47

tf2qh2qh

1045.92259.63 R

7.407104 453R

0.24.44103qt

285

3.04104qA3.0410461.824105 qh(twtfttq855110155 qAqDl51100.052.52006.63 qt0.652051950 qA195011.22340 1234

1.2(205103610351036103

27.74

200

q

2105

2002000

q

2105 （1）x

t2bxq

t

45(40000)0q

t

45(40000.05)90002tqV2bqV

q2b4000451.8105VV tA0.72034672 0.0940.000125450500.125252q

0.12525(450 0.147 k

1 10.0031 qkt29.933(25060)5687.27

d(r2dt) r

ttw1

r

t積分得t

w2r(rr dt4r2tw1

q dt dxtw2

(tw1tw210xx

dx

xdx xt

xdx

0A(x)

0f

0

0f

lnr2 ln1701.66104

2

lnr3 ln115l

2 ln1550.279l

2 Rl2Rl3Rl1l（2）ql

tw1

Rl2Rl（3）tw1tw2

3001.66

tw2299.95tw3tw4tw350

Rl

qtw1tw218040

2.677 R lnr2 71.9e199e1cosh(mH) 3.726tHt

t0tcosh(mH

84t

40t

tf100.14tHt

84100.1416.14不銹鋼取2020mH20e566e5cosh(mH) 84t

60t

tf84.168tHt

0.168 84004204 c1

cV 584c1

84004204 1264 cR/ c1hA exp()exp( )

tt t0t

t12025

t119.05BiV

tt

502030 t0t

300 cVV

1.5103 a

12.7

3

328.07 34 0

exp( 8020 c

c206.145 cVcR/38954383.15103

h 83.2校核：Biv 0.0011 (x,y,z,

(x,)(y,)(z, 2x360 x180

250.181x

sin

1.4009 ) 1.4009

cos1m(x,)

2 exp(1.40092Fo)1.2576exp(77.5317107Biy

25

1y

sin1

cos1m(y,)1.2439exp(157.236107

250.051z

sin1

cos1m(z,)1.1873exp(629.0181075

101.25761.24391.1873exp(863.785710730 把6.02hFoxFoyFoz0.219(x,)(0,315)19.5102

2 11.510

a3582

a

a )a

aa

a2.273107

wens因為絕熱，所以eti1,jti,

xti,j1ti,

xti,j1ti,則

2ti1,jti,j1ti,j14ti,j

wens因為絕熱，所以eti1,jti, xti,j1ti, 則 h2(tfti,j)h2(tfti,j)

)2(1hx 2hxti1, i,j

i, tm600.659

0.478106 Pr對空氣：0.029 18.97106 Pr

ux

0.9

x5.0Re1/2x 1.4110xt

9.8104

ux

0.9

3 3x5.0Re1/2x 8.89x 3t 3

tm

tf2

402

300.618 0.805106 Prx0.1mh

ux

0.8

0.991050.991053x0

0.332xRex

0.332

h2h|x012267.99 BBhh0.000.050.100.150.200.250.300350.400.450x tm

tf2

802

550.02830.0290.02865217.9518.9710618.461062Pr0.6980.6962u

Re

5105Re x c h0.332

30.6976.46 h20.3320.02865

30.69713.88Re

1018.46

hA(tftw)13.460.8(8030)555 0.6480.6590.653520.5560.4781060.5171062Pr3.542.992

u

0.517

xc0.0259h0.332

33.2658787.5 Re

100.517

Nuhl(0.037Re08870)Pr1/3(0.037(1.5474107)08870)h2.42104hAt242580.81(8030)9.7105 Ga

Gb7.5103

u1x1u2

u1x1u2

Ga4103

Gb7.5103abGa tm

tf2

102

5213.2814.1610613.721062Pr0.7070.70520.5510.5740.562521.7891.3061061.54751062Pr13.679.522Re

h(0.037Re08870)Pr1/3l

hAt0.55271000 3.610Gq

2.7635106Re

h2187.8362 G2

2.348109G2849.66G1 （1）NuRePrNuhdu，直接測出du，

Re和通過tfh通過hAthdl(tftwdutftw計算各實驗點的ReNuRe

Nu定性溫度t流速d114.16×10-214.16×10-314.16×10-414.16×10-定性溫度td1234BB （6）Nu0.0182Re0（7）d80mm，u28.9m/s，tw150t

50定性溫度tf50℃，查出0.0283W/m·K，17.9510m6Reud

ud1.2681054Nu

hd（8）一未知流體，熱擴散率a30.2106m2/s，0.030521.09106m2/s，d65mm，u23

Re

7.09104Re3ReRe4，ReRe1、Re2、Re3、Re4Nu0.0182Re07963 h t與t2，則

2834312f0.6197 0.790410ffPrf 786.6810fftw80

355.1106

wwu 1.812.6wwRem vf 0.7904vf- 關聯(lián)-Nu

08Pr0

Nu

08Pr1/3(f)0 whhAtm

5.309h0.0120.6197 t

602

200tmtwt

25020050mqht50h mtf200

f0.663

0.518106fPrff

136.4106

863

Cp4505tw250

f109.9106fwwNuhd

08Pr04(f)0w wdu 1 校核 Rem f fqAmcp3.8410548.23103l45058634 UI5911.1

(48.23103)2(240l

tf"58tf

t584752.5 f0.65075 0.536510 Prf fffReud

0.5

0.0162.5

10.88 tf25.3f0.02632 15.55810 Prf fffReudC

25.5n

5.737

0 40

0.26(5.73710 W/(m hAtmhdl(tw25.3) tw157.2 tf55f0.6535 0.51710 Prfffftw95℃PrwReud

30.517

8.124h0.65353.265037(3.265)0250.26(8.124104)0619132 hAtm191320.0141.5(9555)50488 tf19.4f0.02585 15.00610 Prfffftw67.8℃Prw Re

Nu0.27Re063Pr036(Prf)0250.95

tm

twt2

2

59

59

0.003K- 15.006106 Pr 9.810.003(10018) RaGrPr Pr 0.69622.071710層流C nh0.480.02893(2.0717106)0256.932hAtm6.9320.076(10018)135.72

twt

35535195

195

0.0021K- 34.26106 Pr Ra

(34.26106

RaRa1

d15.47

d20.59 tm

twt2

152

10

10

0.0035K- 14.16106 Pr 9.810.003510 Nu

1/3

0.065Gr(Hh0.02510.065(7.2243105)1/3(0.075)1/91.322 p2.7

ts130

tw130151152

th

Re l(tstw

f0.686

941.02

r232.51060.1m、0.5m1.0m處30Rec2

941.0229.810.68632173.8103 h|x01[4

stw

4232.5106

8130.6W/(mh1.24h3

x0

1.248130.613008.963Re4hl(tstw)

413008.96232.5106

(x)

8.441052

h|x05[4

stw

5437.2W/(mh1.24h3

x0

1.245437.28699.523Re4hl(tstw)

48699.52232.5106

(x)

1.261042

h|x10[4

stw

4572.2W/(mh1.24h3

x0

1.244572.27315.523Re4hl(tstw)

4232.5106

(x)

1.5104三點處Re1800C1.76Re1/31.7618001/3 32gh 2

xc

Re

18002.17381064

2.82 p

ts110

t1101046t110104107

953.22

r 2g3rh1.13[l(tt

8116Re4hl(tstw)

481161.5

492.4883hAtm81160.051.5611474Mr

35.1103 ts110

l

v0.8265

cp,l4233ll

Cw,l

rlr2591062229.9103l[g(lv)]1/2[9.81(9510.8265)]1/2 [Cp,l(twts)]3

4233

]3 Cr 0.01282229.910 q577.544404.740.5805 T11500

2T12.5150037502 11Fb(0T)Fb(0T)0.43352 1T22000 2T22.5200050002 11Fb(0T)Fb(0T2 1T36000 2T32.560001500030.9690.1403 maxT2T2897.6

TK 2T41448.85795.22Fb()0.71970.01072 K 2T0.762273.151727.621Fb(2

1T20.3857622189.6 2T20.76576210.54540.0991 輻

2T12.55762144052 110.95(Fb(0T)Fb(0T))0.95(0.96542 1

K 2T12.5323.15807.875210.95(Fb(0T2

1Fb(0T1

)0.95(1.18121050)E

Ed00.1Ebd10.4Ebd30.2Ebd 0.1Fb(0T)0.4[Fb(0T)Fb(0T)]0.4[Fb(0T)Fb(0T)]0.2[Fb(0T) 1 Fb(0T)122T315004500 Fb(0T)233T515007500 Fb(0T)30.1001370.4(0.5640.0137)0.2(0.83440.564)E

0.27565.67108150047.91104 E 0Ebd2EbdE

b(01Tb

b(01T11T225005000 Fb(0T)10.450.63380.1(10.6338)ET40.32185.67108250047.1271051T0.382500950 2T0.762500'0.45(0.05312.25104)0.0238

0.02385

E)

(T4T4)5.67

1273.15)4(773.15)4)1.287105

b

q'q

5.67(12.731549.73154) s

11

1

q"q

0.44441.2871055.721046s6

11

1

Q(T4T4) s

E

0.85.67

1

J1G1J1q1,2

J1

q11

1(5)

q11

b14 5.67

2

3

11

11 4T4T 24523.1544T4T 24523.1542qq1,3

5.67(5.231544.534411

69.85 5.67(5.231544.5344q 1

2

GT

T 393.54445.67（2）GG445.67E[ (1

1(01T T

1T32637890.55.67(

)4

T qh t)[(t273.15)4

1f q

tw2

qh )

2 f 1解以上三式，得到tw111.6℃tf26.8211f室內(nèi)qh1f

tw1

h'5.442f室外qh2f

tw2

'5.103h2 qch2

t)(T4T4 f28(t0)5.67108(273