温度 t

( ℃ )

密度ρ

(kg/m 3 )

比热 c,

(kJ/kg• ℃ )

导热系数λ × 10 2

(W/m• ℃ )

粘度

μ × 10 5

(Pa•s)

普兰德数

Pr

-50

-40

-30

-20

-10

0

10

20

30

40

50

60

70

80

90

100

120

140

160

180

200

250

300

350

400

500

600

700

800

900

1000

1100

1200

1.584

1.515

1.453

1.395

1.342

1.293

1.247

1.205

1.165

1.128

1.093

1.060

1.029

1.000

0.972

0.946

0.898

0.854

0.815

0.779

0.746

0.674

0.615

0.566

0.524

0.456

0.404

0.362

0.329

0.301

0.277

0.257

0.239

1.013

1.013

1.013

1.009

1.009

1.009

1.009

1.013

1.013

1.013

1.017

1.017

1.017

1.022

1.022

1.022

1.026

1.026

1.026

1.034

1.034

1.043

1.047

1.055

1.068

1.072

1.089

1.102

1.114

1.127

1.139

1.152

1.164

2.035

2.117

2.198

2.279

2.360

2.442

2.512

2.593

2.675

2.756

2.826

2.896

2.966

3.047

3.128

3.210

3.338

3.489

3.640

3.780

3.931

4.268

4.605

4.908

5.210

5.745

6.222

6.711

7.176

7.630

8.071

8.502

9.153

1.46

1.52

1.57

1.62

1.67

1.72

1.77

1.81

1.86

1.91

1.96

2.01

2.06

2.11

2.15

2.19

2.29

2.37

2.45

2.53

2.60

2.74

2.97

3.14

3.31

3.62

3.91

4.18

4.43

4.67

4.90

5.12

5.35

0.728

0.728

0.723

0.716

0.712

0.707

0.705

0.703

0.701

0.699

0.698

0.696

0.694

0.692

0.690

0.688

0.686

0.684

0.682

0.681

0.680

0.677

0.674

0.676

0.678

0.687

0.699

0.706

0.713

0.717

0.719

0.722

0.724