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 language | English |
|---|---|
| Pages (from-to) | 254-270 |
| Number of pages | 17 |
| Journal | International Journal for Numerical Methods in Fluids |
| Volume | 65 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 2011 Jan |
| Externally published | Yes |
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