Abstract
In recent studies on feedback mechanisms leading to the formation and the sustainment of large amplitude pressure oscillations in industrial combustors (e.g. gasturbine combustors, industrial furnaces, etc.) by amplification of initially small-amplitude disturbances the interests are more and more focused on the periodical formation and combustion of coherent turbulent ring vortex structures, being an important characteristic of periodically modulated flows [1,2,3]. On one side, these structures are mainly responsible for the amplification of small-amplitude disturbances, while forming and combusting in-phase with the pressure oscillation in the combustion chamber, fulfilling Rayleigh's criterion. On the other side they make possible to control the amplitudes of combustion-driven pressure oscillations by aerodynamic means (secondary air injection), that can avoid the formation of reactive vortex structures and therefore, interrupt the feedback coupling between pressure oscillation, periodic flow field and periodic heat release. In the present paper experimental studies on the fluiddynamical conditions for the formation of coherent ring vortices are shown and furthermore, first test results of a new method for the suppression of large-amplitude pressure oscillations, driven by periodic ring vortex combustion, are presented, obtained from power plant gasturbine combustors.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
