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RESEARCH PAPERS

Exact and Approximate Equations for Real-Fluid Isentropic Flow

[+] Author and Article Information
P. A. Thompson, D. A. Sullivan

Max-Planck-Institut für Strömungsforschung, D 3400 Göttingen, Federal Republic of Germany

J. Fluids Eng 100(4), 413-418 (Dec 01, 1978) (6 pages) doi:10.1115/1.3448700 History: Received August 08, 1977; Online October 12, 2010

Abstract

Two sets of exact isentropic-flow equations are developed, corresponding respectively to the Tait-Kirkwood equation (P + B) vkT = constant and to the Laplace-Poisson equation PvkL = constant. The exact real-fluid equations have the form of conventional perfect-gas equations, with additional correction terms which are usually small. Similarity principles for each set of equations are given, the Laplace-Poisson form being new. Various simplified forms of the exact equations, of the kind used in practice, are tested for accuracy in an example.

Copyright © 1978 by ASME
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