Numerical modeling of combustion dynamics of a lean-premixed swirl-stabilized injector

Ying Huang, Shih Yang Hsieh, Vigor Yang

Research output: Contribution to conferencePaperpeer-review

2 Citations (Scopus)

Abstract

The present work presents a comprehensive numerical study of the combustion dynamics of a leanpremixed gas turbine swirl injector. The analysis treats the conservation equations in three dimensions, and takes into account finite-rate chemical reactions and variable thermophysical properties. Turbulence closure is achieved using a large-eddy-simulation (LES) technique. The compressible-flow version of the dynamic Smagorinsky model is employed to describe subgrid-scale turbulent motions and their effect on large-scale structures. A level-set flamelet library approach is used to simulate premixed turbulent combustion. In this approach the mean flame location of the flame front is modeled using a level-set Gequation, where G is defined as a distance function. Thermophysical properties are obtained using a presumed probability density function (PDF) together with a laminar flamlet library, which is generated using a detailed chemical kinetic mechanism. The governing equations and the associated boundary conditions are solved by means of a four-step Runge-Kutta scheme along with the implementation of the message passing interface (MPI) parallel computing architecture. The analysis allows for a detailed investigation into the interaction between turbulent flow motions and oscillatory combustion of a swirl-stabilized injector. Results show good agreement with experimental data in terms of acoustic properties and flame evolution. Several mechanisms responsible for driving combustion instabilities in the chamber have been identified and quantified. In particular, the energy cascade process from chemical reactions in the flame zone to acoustic motions in the chamber was carefully studied.

Original languageEnglish
Publication statusPublished - 2002
Event40th AIAA Aerospace Sciences Meeting and Exhibit 2002 - Reno, NV, United States
Duration: 2002 Jan 142002 Jan 17

Conference

Conference40th AIAA Aerospace Sciences Meeting and Exhibit 2002
CountryUnited States
CityReno, NV
Period02-01-1402-01-17

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

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