Mixing and combustion characteristics of kerosene In a model supersonic combustor

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

In this numerical study, supersonic combustion of kerosene in three model combustor configurations is investigated. To this end, 3-D, compressible, turbulent, nonreacting, and reacting flow calculations with a single step chemistry model have been carried out. For the nonreacting flow calculations, the droplet diameter distribution at different axial locations, variation of the Sauter mean diameter, and the mixing efficiency for three injection pressures are presented and discussed. In addition, the effect of turbulent dispersion on the mixing efficiency is studied using a stochastic model in conjunction with the two-equation shear stress transport κ-ω turbulence model. For the reacting flow calculations, contours of heat release and axial velocity at several axial locations are used to identify regions of heat release inside the combustor. Combustion efficiency predicted by the present results is compared with earlier predictions for all the combustor models. Furthermore, the predicted variation of static pressure along the combustor top wall is compared with experimental data reported in the literature. Calculations show that the penetration and spreading of the fuel increases with an increase in the injection pressure. Predicted values of the combustion efficiency are more realistic when the spray model is used for modelling the injection of the fuel. The importance of the mixing process, especially for a liquid fuel such as kerosene, on the prediction of heat release is discussed in detail.

Original languageEnglish
Pages (from-to)583-592
Number of pages10
JournalJournal of Propulsion and Power
Volume25
Issue number3
DOIs
Publication statusPublished - May 2009
Externally publishedYes

Fingerprint

kerosene
Kerosene
combustion chambers
Combustors
combustion
combustion efficiency
reacting flow
injection
heat
supersonic combustion
Liquid fuels
Stochastic models
liquid fuels
Turbulence models
compressible flow
static pressure
turbulence models
Shear stress
predictions
turbulent flow

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science
  • Fuel Technology
  • Mechanical Engineering

Cite this

Mixing and combustion characteristics of kerosene In a model supersonic combustor. / Kannaiyan, Kumaran; Babu, V.

In: Journal of Propulsion and Power, Vol. 25, No. 3, 05.2009, p. 583-592.

Research output: Contribution to journalArticle

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