A Numerical Model for the Propagation of Partially-Premixed Gas Flames at Low-Mach Number (Contributo in atti di convegno)

Type
Label
  • A Numerical Model for the Propagation of Partially-Premixed Gas Flames at Low-Mach Number (Contributo in atti di convegno) (literal)
Anno
  • 1995-01-01T00:00:00+01:00 (literal)
Alternative label
  • F. S. Marra and G. Continillo (1995)
    A Numerical Model for the Propagation of Partially-Premixed Gas Flames at Low-Mach Number
    in ISFEHSVD 95, First International Seminar on Fire-and-Explosion Hazard of Substances and Venting of Deflagrations, Moscow, July 17-21, 1995
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • F. S. Marra and G. Continillo (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Ricerche sulla Combustione - CNR (literal)
Titolo
  • A Numerical Model for the Propagation of Partially-Premixed Gas Flames at Low-Mach Number (literal)
Abstract
  • This paper describes an activity devoted to the study of the dynamics of the propagation of àmes through gas mixtures initiated by localised ignition sources? with reference to the development of a mathematical model and a numerical method specially devised to compute low Mach number situations? The work is based on a primitive variable? pseudo-compressible ?ow approach? with a projection method to derive an elliptic equation for the perturbation pressure? and is meant to be applicable even in presence of strong variations of the properties of the medium? including density? due to temperature and species variations? Finite-rate combustion chemistry is taken into account? The numerical solution of the model equations is conducted by means of an explicit formulation for the time-dependent balance equations? and a direct? band-matrix LU solver for the pressure elliptic equation? The method proves very e?ective? in that stability limitations are not tighter than those suggested by the request of a satisfactory description of these inherently transient phenomena.? To illustrate the methodology? transients of laminar methane?air àmes were computed? from the ignition of initial partially? and fully?premixed conditions? followed by the propagation of a flàme front throughout the open end of a cylindrical pipe? In the cases discussed? the results provide interesting observations of the interaction of the ?flow with combustion?. (literal)
Prodotto di
Autore CNR

Incoming links:


Prodotto
Autore CNR di
data.CNR.it