Evaluation of a Scalar Probability Density Function Approach for Turbulent Jet Nonpremixed Flames

Abstract

A scalar probability density function (PDF) method, considering a detailed chemical kinetics, is applied to a diluted hydrogen turbulent jet nonpremixed flame to evaluate the performance. The flame is formed on a nozzle of an inner diameter of D=6mm, with a fuel exit velocity of 30m/s, surrounded by two annular pipes issuing airs of higher and lower velocities of 30m/s and 3m/s, respectively. The hydrogen as a fuel is diluted by one-third volumetrically by the nitrogen, giving a stoichiometric mixture fraction of 0.46. The flow field has been solved on the basis of the kappa-epsilon two-equation model. A modelled scalar PDF equation has been solved by an Eulerian Monte Carlo method developed by Pope. The PDF transport term, due to turbulent velocity fluctuations involved in the PDF equation, is modelled based on the gradient diffusion concept. The molecular mixing term is modelled by the modified Curl model.

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Document Details

Document Type
Technical Report
Publication Date
Apr 14, 2005
Accession Number
ADA447128

Entities

People

  • K. Yamamuro
  • S. Noda
  • Y. Horitani

Organizations

  • Toyohashi University of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Flow
  • Boltzmann Equation
  • Chemical Kinetics
  • Chemical Reaction Properties
  • Chemical Reactions
  • Combustion
  • Computational Fluid Dynamics
  • Diffusion
  • Engineering
  • Equations
  • Flow Fields
  • Fluid Dynamics
  • Mechanical Engineering
  • Probability
  • Probability Density Functions
  • Test And Evaluation
  • Turbulent Diffusion

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Combustion science or combustion engineering.
  • Computational Fluid Dynamics (CFD)