This paper describes an experimental investigation of the nonlinear interactions between
self-excited and driven oscillations in a premixed swirl-stabilized combustor. This interaction …

THIS note describes an investigation of the nonlinear interactions between natural acoustic
modes and forced oscillations in an unstable combustor. Such instabilities are a serious …

This paper describes an experimental investigation of the response of the flame in a lean,
premixed combustor to imposed acoustic oscillations. It presents further analysis and …

Self-excited oscillations of a confined flame, burning in the wake of a bluff body flame holder,
are considered. These oscillations occur due to interaction between unsteady combustion …

Results The reported tests were performed at a nominally unstable condition, with an
instability frequency of 461 Hz. The forcing frequencies investigated ranged from 150 to 430 …

Future combustors designed for better efficiency and lower pollutant emission are expected
to operate closer to their stability boundary, thereby increasing the risk of encountering …

Combustion instabilities in lean premixed combustors are often manifested by pressure
oscillations that can result in serious performance degradation and even cause failure …

Presently, passive methods of controlling combustion instability fall short when one
considers stabilizing multiple acoustic modes. In this paper, we present a passive control …

In this study, experimental measurements are performed on a swirl-stabilized combustor to
study the nonlinear combustor dynamic characteristics under acoustic excitations. The …

HIS paper focuses on the direct response of premixed flames to transverse acoustic
oscillations in a cylindrical can combustor. The drive towards lower NOx emissions has …