低温下高纯空气黏度实验研究OA北大核心CSTPCD

The accurate thermophysical properties of the working fluid are the basis for industrial process calculations and equipment usage optimization.However,the lack of data on the viscosity of air below 190 K affects the engineering design and process optimization of industrial applications.In this work,the viscosity measurements of high purity air in gas,liquid,supercritical states were performed by using a low-temperature vibrating-wire viscometer at temperatures from 85 K to 190 K and pressures from 0.2 MPa to 5 MPa.The standard uncertainty of the viscosity measurements was estimated to be 2.64%over all the ranges of temperature and pressure.Measurement results can provide basic data for the optimization design of related technologies in industrial liquid air applications.