A priori testing of subgrid models for chemically reacting non-premixed turbulent shear flows

Jiménez Sendín, Javier; Liñán Martínez, Amable; Rogers, Michael M. y Higuera Antón, Francisco (1997). A priori testing of subgrid models for chemically reacting non-premixed turbulent shear flows. "Journal of Fluid Mechanics", v. 349 ; pp. 149-171. ISSN 0022-1120.

Descripción

Título: A priori testing of subgrid models for chemically reacting non-premixed turbulent shear flows
Autor/es:
  • Jiménez Sendín, Javier
  • Liñán Martínez, Amable
  • Rogers, Michael M.
  • Higuera Antón, Francisco
Tipo de Documento: Artículo
Título de Revista/Publicación: Journal of Fluid Mechanics
Fecha: 1997
Volumen: 349
Materias:
Palabras Clave Informales: chemically reactive flow; probability; shear turbulence; a priori testing; subgrid models; chemically reacting nonpremixed turbulent shear flows; beta assumed probability density function approximation; nonpremixed turbulent reacting flows; infinitely fast chemistry; plane constant density turbulent mixing layers; intermittency; plane averaged properties; product mass fractions; radical generation; mixture fraction; conditional gradient distribution;
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Motopropulsión y Termofluidodinámica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The beta-assumed-p.d.f. approximation of Cook and Riley (1994) is tested as a subgrid model for the LES computation of non-premixed turbulent reacting flows, in the limit of infinitely fast chemistry, for two plane constant-density turbulent mixing layers with different degrees of intermittency. Excellent results are obtained in the computation of plane-averaged properties, such as product mass fractions and relatively high powers of the temperature, and even of the p.d.f. of the conserved scalar itself. In all these cases the errors are small enough to be useful in practical applications. The analysis is extended to slightly out-of-equilibrium problems, such as the generation of radicals, and formulated in terms of the p.d.f. of the gradient of the mixture fraction. It is shown that the form of the conditional gradient distribution is universal in a wide range of cases, whose limits are established. Within those limits, engineering approximations to the radical concentration are also possible. It is argued that the experiments in this paper are already in the limit of high Reynolds numbers.

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ID de Registro: 857
Identificador DC: http://oa.upm.es/857/
Identificador OAI: oai:oa.upm.es:857
URL Oficial: http://journals.cambridge.org/action/displayJournal?jid=FLM
Depositado por: Archivo Digital UPM
Depositado el: 26 Mar 2008
Ultima Modificación: 20 Abr 2016 06:34
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