Nine decades of rocket engine and gas turbine development have shown that
thermoacoustic oscillations are difficult to predict but can usually be eliminated with …

This review discusses a recently developed optimization technique for analyzing the
nonlinear stability of a flow state. It is based on a nonlinear extension of nonmodal analysis …

Nonlinear self-excited thermoacoustic oscillations appear in systems involving confined
combustion in the form of coupled acoustic pressure oscillations and unsteady heat release …

Thermoacoustic instability, also known as combustion instability, continues to be a problem
in the development of modern gas turbine combustors and rocket engines. Such instability is …

Thermoacoustic systems can oscillate self-excitedly, and often non-periodically, owing to
coupling between unsteady heat release and acoustic waves. We study a slot-stabilized two …

The wake characteristics of bluff-body-stabilized flames are a strong function of the density
ratio across the flame and the relative offset between the flame and shear layer. This paper …

In a thermoacoustic system, such as a flame in a combustor, heat release oscillations couple
with acoustic pressure oscillations. If the heat release is sufficiently in phase with the …

Considerable research and development efforts are required to meet the targets of future
gas turbine technologies in terms of performance, emissions, and operational flexibility. One …

A bifurcation analysis of the dynamical behavior of a horizontal Rijke tube model is
performed in this paper. The method of numerical continuation is used to obtain the …

This article introduces and reviews recent work using a simple optimization technique for
analysing the nonlinear stability of a state in a dynamical system. The technique can be …