Investigation of Equivalence Ratio Fluctuations on the Dynamics of Turbulent Lean Premixed Methane/Air Flames with a Linear-Eddy Model
Kapitel i bok, 2014

Heat release fluctuations generated by equivalence ratio fluctuations may interact with the acoustics of a gas turbine combustion chamber leading to unwanted combustion instabilities, which remains a critical issue in the development of low emission, lean premixed gas turbine combustors. The present article addresses this topic by numerical investigations of one-dimensional lean premixed methane/air flames subject to prescribed sinusoidal equivalence ratio fluctuations. Compared to previous investigations, we focus on turbulent conditions and emission predictions using the one-dimensional linear-eddy model (LEM) and detailed chemistry. Within the limitations of the one-dimensional LEM the approach allows to investigate the fully non-linear regime of flame response to equivalence ratio fluctuations under turbulent conditions. Results for different forcing amplitudes and turbulence levels indicate a strongly non-linear behavior for high forcing amplitudes.

Författare

Michael Oevermann

Chalmers, Tillämpad mekanik, Förbränning

Rudibert King

Christina Schrödinger

Christian Oliver Paschereit

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

1612-2909 (ISSN) 1860-0824 (eISSN)

Vol. 127 213-228

Styrkeområden

Transport

Energi

Ämneskategorier

Annan teknik

Energiteknik

Strömningsmekanik och akustik

DOI

10.1007/978-3-319-11967-0_14

ISBN

978-3-319-11966-3