Entropy variation in isothermal fluid flow considering real gas effects

Journal Of Aerospace Technology And Management

Endereço:
Pr Mal Eduardo Gomes, 50
São José dos Campos / SP
Site: http://www.jatm.com.br
Telefone: (12) 3947-5115
ISSN: 19849468
Editor Chefe: Francisco Cristóvão Lourenço de Melo
Início Publicação: 31/05/2009
Periodicidade: Quadrimestral
Área de Estudo: Engenharia aeroespacial

Entropy variation in isothermal fluid flow considering real gas effects

Ano: 2011 | Volume: 3 | Número: 1
Autores: Maurício Guimarães da Silva, Paulo Afonso Pinto de Oliveira
Autor Correspondente: Maurício Guimarães da Silva | [email protected]

Palavras-chave: isothermal flow, real gas, entropy, petroleum engineering

Resumos Cadastrados

Resumo Inglês:

The present paper concerns on the estimative of the pressure loss and entropy variation in an isothermal fluid flow, considering real gas effects. The 1D formulation is based on the isothermal compressibility module and on the thermal expansion coefficient in order to be applicable for both gas and liquid as pure substances. It is emphasized on the simple methodology description, which establishes a relationship between the formulation adopted for ideal gas and another considering real gas effects. A computational procedure has been developed, which can be used to determine the flow properties in duct with a variable area, where real gas behavior is significant. In order to obtain quantitative results, three virial coefficients for Helium equation of state are employed to determine the percentage difference in pressure and entropy obtained from different formulations. Results are presented graphically in the form of real gas correction factors, which can be applied to perfect gas calculations.