ON THE ISENTROPIC TRANSFORMATION OF AIR.

Kouremenos, DA; Antonopoulos, KA

dc.contributor.author	Kouremenos, DA	en
dc.contributor.author	Antonopoulos, KA	en
dc.date.accessioned	2014-03-01T01:38:57Z
dc.date.available	2014-03-01T01:38:57Z
dc.date.issued	1986	en
dc.identifier.issn	07507240	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/22488
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0022911617&partnerID=40&md5=a9bfa4058231c1d796669197c738d9c8	en
dc.subject.other	MATHEMATICAL TECHNIQUES - Numerical Methods	en
dc.subject.other	THERMODYNAMICS - Mathematical Models	en
dc.subject.other	ENTROPY EQUATION	en
dc.subject.other	ISENTROPIC TRANSFORMATIONS	en
dc.subject.other	REAL GASES	en
dc.subject.other	GASES	en
dc.title	ON THE ISENTROPIC TRANSFORMATION OF AIR.	en
heal.type	journalArticle	en
heal.publicationDate	1986	en
heal.abstract	The classical isentropic exponent appearing in the isentropic change equations of the ideal gas is replaced in each of these equations by one of three different exponents so that these equations may describe very accurately small isentropic transformations of real gases. Analytical expressions are provided for the three exponents introduced and their numerical values are calculated in the case of real air for a wide range of conditions. Two methods, based on these three exponents, are proposed for calculating isentropic transformations of real gases. Both methods are very accurate and very economical with respect to computer time. In the first, the entropy equation of the real gas is solved iteratively with accelerated convergence due to a good initiation obtained by use of the new exponents. The other may be used in cases where the entropy equation is not available. The methods have been applied in the calculation of the one-dimensional isentropic flow of real air within the temperature and pressure ranges of practical interest.	en
heal.journalName	Journal de mecanique theorique et appliquee	en
dc.identifier.volume	5	en
dc.identifier.issue	3	en
dc.identifier.spage	515	en
dc.identifier.epage	534	en