Stabilized finite element computation of NOx emission in aero-engine combustors

A. Corsini, F. Rispoli, T. E. Tezduyar

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

A stabilized finite element formulation for the computation of turbulent reacting flows and NOx emission is presented. The method is based on the Streamline-Upwind/Petrov-Galerkin (SUPG) and Pressure-Stabilizing/Petrov-Galerkin (PSPG) formulations, complemented with directionally formulated diffusion for reaction-dominated flows ('DRDJ' stabilization). The stabilized formulation is applied to the advection-diffusion-reaction equations governing the turbulent combustion and the NOx emission equations based on the thermal and the N2O pathways. The simulation is carried out for a co-axial burner, with a non-premixed swirling flame. The burner is operated at high pressure to represent the take-off conditions for an aero-engine. The vortical patterns of the swirling flame are analyzed together with the temperature field and flame position. The NOx formation processes are discussed, providing insight into the features of thermal and N2O mechanisms.

Original languageEnglish
Pages (from-to)254-270
Number of pages17
JournalInternational Journal for Numerical Methods in Fluids
Volume65
Issue number1-3
DOIs
Publication statusPublished - 2011 Jan 1

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Keywords

  • DRD formulation
  • Finite elements
  • NOx emission
  • Reacting flow
  • Stabilized methods
  • Turbulent flow

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • Computer Science Applications
  • Applied Mathematics

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