A calculating procedure is presented, based on a least squares polynomial approximation, for duplicating existing tabular values of selected thermodynamic and transport properties of various important gases. Most of the data refer to ideal gases; however, for functions of both temperature and pressure , the pressure has been specified such that the polynomial approximations have only temperature as the independent variable. Suggested algorithms for polynomial evaluations up to the sixth degree are presented and optimized for hand-held or desk top calculators. Using the suggested polynomial fits and a suitable calculator, it is possible to duplicate existing table values for the various functions of the selected gases without interpolation of reference to the tables per se. The error of the included fits is generally less than 0.5%. With the lowest order approximation the error can be as high as 1%. (Author)The work reported herein is the outcome of a directed study
course (AE 4900) in the Department of Aeronautics.http://archive.org/details/gaspropertiescom00andrNAApproved for public release; distribution is unlimited
