Roder Hans M
National Bureau of Standards, Boulder, CO 80303.
J Res Natl Bur Stand (1977). 1982 Jul-Aug;87(4):279-310. doi: 10.6028/jres.087.019.
The paper presents new experimental measurements of the thermal conductivity of oxygen for thirteen isotherms at temperatures from 78 to 310 K with pressures to 70 MPa and densities from 0 to 40 mol/L. The measurements were made with a transient hot wire apparatus and they cover a wide range of physical states including the dilute gas, the moderately dense gas, the near critical region, the compressed liquid states, and the vapor at temperatures below the critical temperature. The thermal conductivity surface is represented with an equation that is based in part on an existing correlation of the dilute gas. The data are compared with the experimental measurements of others through the new correlation. The new measurements show that the critical enhancement extends to quite high temperatures, about 300 K. The precision (2) of the oxygen measurements is between 0.5 and 0.8 percent for wire temperature transients of 4 to 5 K, while the accuracy is estimated to be 1.5 percent.
本文给出了氧气热导率的新实验测量结果，该测量针对13条等温线，温度范围为78至310K，压力至70MPa，密度为0至40mol/L。测量使用瞬态热线装置进行，涵盖了广泛的物理状态，包括稀薄气体、中等密度气体、近临界区域、压缩液态以及低于临界温度的蒸汽态。热导率曲面由一个方程表示，该方程部分基于稀薄气体的现有关联式。通过新的关联式将这些数据与其他实验测量结果进行了比较。新的测量结果表明，临界增强延伸至相当高的温度，约300K。对于4至5K的热线温度瞬变，氧气测量的精度为0.5%至0.8%，而准确度估计为1.5%。
