A three-dimensional linear acoustic analysis of gas turbine combustion instability

Danning You, Xiaofeng Sun, Vigor Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

A three-dimensional linear acoustic analysis has been developed to study the combustion instabilities in systems with complex geometries and non-uniform distributions of mean flow properties. The formulation is based on a generalized wave equation derived from the conservation equations for two-phase mixtures. To account for the configuration and property variations, the chamber is discretized axially into a number of cells, within which the axial flow properties are assumed to be uniform. A combined modal-expansion and spatialaveraging technique is then applied to treat the unsteady motions in the transverse plane of each cell. Finally, the oscillatory flow properties are matched at the interface of each pair of adjacent cells. This procedure eventually leads to the determination of the stability characteristics of the system in terms of the oscillatory frequency and growth constant. The analysis has been carefully validated against several well-defined problems for which either analytical or numerical solutions are available. A parametric study is conducted to investigate the various mechanisms for driving combustion instabilities in laboratory combustor.

Original languageEnglish
Title of host publication41st Aerospace Sciences Meeting and Exhibit
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624100994
DOIs
Publication statusPublished - 2003
Event41st Aerospace Sciences Meeting and Exhibit 2003 - Reno, NV, United States
Duration: 2003 Jan 62003 Jan 9

Publication series

Name41st Aerospace Sciences Meeting and Exhibit

Other

Other41st Aerospace Sciences Meeting and Exhibit 2003
CountryUnited States
CityReno, NV
Period03-01-0603-01-09

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

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