不同温度下空气中饱和水分含量及饱和蒸汽压...doc

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1、不同温度下空气中饱和水分含量及饱和蒸汽压兰州真空设备有限责任公司温度℃饱和水分含量g/m3饱和蒸汽压Pa温度℃饱和水分含量g/m3饱和蒸汽压Pa4050.917368.624-121.81217.38243846.006618.708-141.52181.28523641.515935.392-161.27150.78243437.405314.68-181.06125.07483233.644483.512-200.888103.36323030.304238.42-220.73685.2482827.203776.22-240.59070.06322

2、624.303357.972-260.50457.2762421.802981.016-280.41446.75322219.402641.356-300.34038.09522017.302336.33-320.27730.76921815.362061.936-340.22624.90841613.631815.516-360.18420.11321412.051597.068-380.14916.11721210.681401.264-400.12012.9204109.351226.77-420.09610.256488.281072.26-44

3、0.0778.125267.28933.732-460.0616.393646.39812.52-480.0495.061625.60704.628-500.0383.862804.85609.923-520.0303.0636-24.14516.816-540.0242.3976-43.52436.896-560.0181.8648-63.00368.298-580.0141.4652-82.54309.8232-600.0111.0656-102.14259.74-900.0093粘滞流下20℃空气的管道流导《真空设计手册》项目公式长管短管矩形截面直

4、管a/b1.00.90.80.70.60.50.40.30.20.1Kf1.000.990.980.950.900.820.710.580.420.23环形管道椭圆管道孔当时，当时，当时，符号意义单位U粘滞流下20℃空气流导m3/Sd管道直径ml管道长度ma、b椭圆长半轴，短半轴m管道中平均压力PaA0孔面积m2x孔两侧压力比粘滞流—分子流下管道流导Un.f.20℃=d：管道直径ml：管道长度m：管道中平均压力=（P1+P2）/2分子流下20℃空气的管道流导《真空设计手册》项目公式圆长管圆孔圆短管L/d00.050.10.20.40.60.8a10.96

5、50.9310.870.7690.690.6251.0246810204060801000.5720.40.250.1820.1430.1170.06250.0320.020.0010正方形矩形b/a10.6670.5000.3330.2000.1250.100Kf1.1081.1261.1511.1981.2971.4001.444等边三角形扁缝形a>>bl/b0.10.20.40.81Kb0.0360.0680.130.220.26234510>100.400.520.600.670.941环形d2/d100.2590.50.7070.8660.96

6、6Ka11.0721.1541.2541.4301.675椭圆形锥形直角弯管按直管计算,管道计算长度缩孔符号：——流导（L/s）a和b——椭圆长半轴、短半轴——管长（cm）——面积（cm2）——管道直径（cm）材料物理性能组别牌号重度g/cm3膨胀系数d×106导热系数卡/厘米.秒.度电阻系数Ω.mm2/m熔点℃纯铜T18.920℃17.70.961083T28.917.70.951080T48.8917.40.431080黄铜H908.818.20.40.039H808.6519.10.340.054H658.4720.10.2880.069H628.

7、4320.60.260.071纯铝20~100℃20~200℃L62.712424.80.54658L42.712424.80.52LY112.82223.40.41铸铝ZL22.810.230.240.33~0.354.66~4.926ZL52.580.2450.2550.218.21ZL102.650.190.210.385.27~5.57ZL142.70.220.230.35~0.455.88~6.67碳钢10钢7.8511.60.8080.13245钢7.8111.590.5020.132不锈钢1Cr18Ni97.90.0390.0420.163

8、0.731Cr18Ni9Ti7.750.0390.0420.1630.73GB5