高温高压湿空气物性研究

Research of Properties of Humid Air at High Temperature and High Pressure

注空气泡沫采油作为新型采油技术,在石油资源日趋紧张的今天显示出巨大的技术和经济优势。湿空气的热力学性质及迁移性质对注空气采油中注气井传热,流动工程计算以及可燃气体的爆炸极限研究至关重要。本文对干空气成分进行了合理简化,提出了氮气、氧气、水蒸气三元混合湿空气模型,运用RK与SRK状态方程在标准数据范围内计算了饱和湿空气压缩因子,并运用RK方程计算获得湿空气的焓熵和比体积。采用剩余粘度法和Stiel-Thodos修正法分别对湿空气粘度和导热系数进行计算。

As a new creative technique for oil recovery, air-foam flooding shows great economic and technological superiority in present days that the oil resources become more and more scarce. The transport and thermodynamic properties of moist air is essential for the calculation of heat transfer and flow in gas injection wells, and for the research of the explosive limit. Through the reasonable simplificationfor the composition of the dry air, the ternary mixed model of humid air was proposed, and the compressibility factorwas calculated in the rage of the standard data by using the RK ＆ SRK EOS （Equation of State）. The enthalpy, the entropy and the specific volume of moist air is calculated by using the RK EOS. The viscosity and the thermal conductivity coefficient of moist air was calculated by using residual viscosity method and Stiel-Thodos correction method respectively.