Accession Number : ADA321723

Title :   Thermodynamic Properties of Air at High Temperatures,

Corporate Author : TECHNICAL INFORMATION SERVICE (AEC) OAK RIDGE TN

Personal Author(s) : Hirschfelder, J. O. ; Magee, J. L.

PDF Url : ADA321723

Report Date : 1947

Pagination or Media Count : 50

Abstract : Our knowledge of the thermodynamical properties of air is surprisingly incomplete. In the lower temperature range, i.e.,below 25,000 K, Brinkley, Kirkwood, and Richardson (BKR) (OSRD-3550) and Bethe (OSRD-369) have not computed enough primary points to permit accurate determinations of the variation of the thermodynamical properties along adiabats. The secondary tables which BKR have computed are extremely rough and cannot be used satisfactorily for following the shock hydrodynamics by the method of characteristics. Similarly in the high temperature range, Fuchs, Kynch, and Peierls (FKP) (MS-61 ; BM-83) have not computed enough primary points and they do not consider extremely low densities We have tried to fill in additional points by making crude assumptions which make the calculations quick but inaccurate. We then attempted to fit these computations smoothly onto the published results. The following tables are therefore unsatisfactory, but they are qualitatively correct and should serve to obtain the qualitative and semi-quantitative features of the hydrodynamics of shocks in air. It seems to us highly desirable that accurate tables of the thermodynamical properties of air be computed. This project would be easy to set up but the actual computations are sufficiently difficult that it would require approximately ten people for one year.

Descriptors :   *AIR, *HIGH TEMPERATURE, *THERMODYNAMIC PROPERTIES, NUMERICAL ANALYSIS, SHOCK, TABLES(DATA), RANGE(EXTREMES), HYDRODYNAMICS.

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE