不同温度下空气中饱和水分含量及饱和蒸汽压.doc

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Pa4050.917368.624-121.81217.38243846.006618.708-141.52181.28523641.515935.392-161.27150.78243437.405314.68-181.06125.07483233.644483.512-200.888103.36323030.304238.42-220.73685.2482827.203776.22-240.59070.06322624.303357.972-260.50457.2762421.802981.016-280.41446.75322219.402641.356-300.34038.09522017.302336.33-320.27730.76921815.362061.936-340.22624.90841613.631815.516-360.18420.11321412.051597.068-380.14916.11721210.681401.264-400.12012.9204109.351226.77-420.09610.256488.281072.26-440.0778.125267.28933.732-460.0616.393646.39812.52-480.0495.061625.60704.628-500.0383.862804.85609.923-520.0303.0636-24.14516.816-540.0242.3976-43.52436.896-560.0181.8648-63.00368.298-580.0141.4652-82.54309.8232-600.0111.0656-102.14259.74-900.0093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 m l：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/d00.050.10.20.40.60.8a10.9650.9310.870.7690.690.6251.0246810204060801000.5720.40.250.1820.1430.1170.0625 0.0320.020.0010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 abl/b0.10.20.40.81Kb0.0360.0680.130.220.26234510100.400.520.600.670.941环形d2/d100.2590.50.7070.8660.966Ka11.0721.1541.2541.4301.675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d106导热系数卡/厘米.秒.度电阻系数.mm2/m熔点纯铜T18.92017.70.961083T28.917.70.951080T48.8917.40.431080黄铜H908.818.20.40.039H808.6519.10.340.054H658.4720.10.2880.069H628.4320.60.260.071纯铝2010020200L62.712424.80.54658L42.712424.80.52LY112.82223.40.41铸铝ZL22.810.230.240.330.354.664.926ZL52.580.2450.2550.218.21ZL102.650.190.210.385.275.57ZL142.70.220.230.350.455.886.67碳钢10钢7.8511.