干空气主要物理参数(密度、比热容、导热系数、热扩散率、粘度)

干空气在压力为100kPa时的参数 温度t ℃ -150 -100 -50 -20 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 50 60 70 密度ρ kg/m3 2.817 1.984 1.534 1.365 1.252 1.247 1.243 1.238 1.234 1.229 1.224 1.220 1.215 1.211 1.206 1.202 1.198 1.193 1.189 1.185 1.181 1.177 1.172 1.168 1.164 1.161 1.158 1.154 1.149 1.146 1.142 1.138 1.134 1.131 1.127 1.124 1.120 1.117 1.113 1.110 1.106 1.103 1.099 1.096 1.092 1.056 1.025 0.996 比热容Cp kJ/(kg·K) 1.038 1.022 1.013 1.009 1.009 1.009 1.009 1.009 1.009 1.009 1.009 1.009 1.009 1.009 1.009 1.010 1.010 1.010 1.011 1.011 1.012 1.012 1.012 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.013 1.017 1.017 1.017 导热系数λ 10-2W/(m·K) 1.163 1.617 2.035 2.256 2.373 2.381 2.389 2.397 2.405 2.413 2.421 2.430 2.432 2.446 2.454 2.461 2.468 2.475 2.482 2.489 2.496 2.503 2.510 2.517 2.524 2.530 2.535 2.541 2.547 2.552 2.559 2.564 2.570 2.576 2.582 2.589 2.596 2.603 2.610 2.617 2.624 2.631 2.638 2.645 2.652 2.733 2.803 2.861 热扩散率DT 10-2m2h-1) 1.450 2.880 4.730 5.940 6.750 6.799 6.848 6.897 6.946 6.995 7.044 7.093 7.142 7.191 7.240 7.282 7.324 7.366 7.408 7.450 7.492 7.534 7.576 7.618 7.660 7.708 7.756 7.804 7.852 7.900 7.948 7.996 8.044 8.092 8.140 8.191 8.242 8.293 8.344 8.395 8.446 8.497 8.548 8.599 8.650 9.140 9.650 10.180 动力粘度μ 10-6Pa·s 8.730 11.770 14.610 16.280 17.160 17.220 17.279 17.338 17.397 17.456 17.514 17.574 17.632 17.691 17.750 17.799 17.848 17.897 17.946 17.995 18.044 18.093 18.142 18.191 18.240 18.289 18.338 18.387 18.437 18.486 18.535 18.584 18.633 18.682 18.731 18.780 18.829 18.878 18.927 18.976 19.025 19.074 19.123 19.172 19.221 19.610 20.400 20.400 运动粘度ν 10-6m2s-1 3.100 5.940 9.540 11.930 13.700 13.800 13.900 14.000 14.100 14.200 14.300 14.400 14.500 14.600 14.700 14.800 14.900 15.000 15.100 15.200 15.300 15.400 15.500 15.600 15.700 15.791 15.882 15.973 16.064 16.155 16.246 16.337 16.428 16.519 16.610 16.709 16.808 16.907 17.006 17.105 17.204 17.303 17.402 17.500 17.600 18.600 19.600 20.450

80 90 100 120 140 160 180 200 250 300 350 400 500 600 800 1000 1200

0.968 0.942 0.916 0.870 0.827 0.789 0.755 0.723 0.653 0.596 0.549 0.508 0.450 0.400 0.325 0.268 0.238

1.022 1.022 1.022 1.026 1.026 1.030 1.034 1.034 1.043 1.047 1.055 1.059 1.072 1.089 1.114 1.139 1.164

2.931 3.001 3.070 3.198 3.326 3.442 3.570 3.698 3.977 4.291 4.571 4.850 5.396 5.815 6.687 7.618 8.455

10.650 11.250 11.800 12.900 14.100 15.250 16.500 17.800 21.200 24.800 28.400 32.400 40.000 49.100 68.000 89.900 113.000

20.990 21.570 21.770 22.750 23.540 24.120 25.010 25.890 27.950 29.710 31.480 32.950 36.190 39.230 44.520 49.520 53.940

21.700 22.900 25.780 26.200 28.450 30.600 33.170 35.820 42.800 49.900 57.500 64.900 80.400 98.100 137.000 185.000 232.500