你自己看下
干空气的物理性质
温度t/℃密度ρ/kg·m-3 比定压热容cp/kJ·kg-1·K-1 -50 1.584 1.013 -40 1.515 1.013 -30 1.453 1.013 -20 1.395 1.009 -10 1.342 1.009
0 1.293 1.009
10 1.247 1.009
20 1.205 1.013
30 1.165 1.013
40 1.128 1.013
50 1.093 1.017
60 1.06 1.017
70 1.029 1.017
801 1.022
900.972 1.022 1000.946 1.022 1200.898 1.026 1400.854 1.026 1600.815 1.026 1800.779 1.034 2000.746 1.034 2500.674 1.043 3000.615 1.047 3500.566 1.055 4000.524 1.068 5000.456 1.072 6000.404 1.089 7000.362 1.102 8000.329 1.114 9000.301 1.127 10000.277 1.139 11000.257 1.152 12000.239 1.164
导热系数λ/10-2W·m-1·K-1粘度μ/10-5Pa·s 普兰德数Pr
2.035 1.460.728
2.117 1.520.728
2.198 1.570.723
2.279 1.620.716
2.36 1.670.712
2.442 1.720.707
2.512 1.760.705
2.593 1.810.703
2.675 1.860.701
2.756 1.910.699
2.826 1.960.698
2.896 2.010.696
2.966 2.060.694
3.047 2.110.692
3.128 2.150.69
3.21 2.190.688
3.338 2.280.686
3.489 2.370.684
3.64 2.450.682
3.78 2.530.681
3.931 2.60.68
4.268 2.740.677
4.605 2.970.674
4.908 3.140.676
5.21 3.30.678
5.745 3.620.687
6.222 3.910.699
6.711 4.180.706
7.176 4.430.713
7.63 4.670.717
8.071 4.90.719
8.502 5.120.722
9.153 5.350.724