Equilibrium gas flow computations. I - Accurate and efficient calculation of equilibrium gas propertiesThis paper treats the accurate and efficient calculation of thermodynamic properties of arbitrary gas mixtures for equilibrium flow computations. New improvements in the Stupochenko-Jaffe model for the calculation of thermodynamic properties of diatomic molecules are presented. A unified formulation of equilibrium calculations for gas mixtures in terms of irreversible entropy is given. Using a highly accurate thermo-chemical data base, a new, efficient and vectorizable search algorithm is used to construct piecewise interpolation procedures with generate accurate thermodynamic variable and their derivatives required by modern computational algorithms. Results are presented for equilibrium air, and compared with those given by the Srinivasan program.
Document ID
19890055879
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Liu, Yen (NASA Ames Research Center Moffett Field, CA, United States)
Vinokur, Marcel (NASA Ames Research Center Moffett Field; Sterling Software, Palo Alto, CA, United States)