University of Cambridge > Talks.cam > Waves Group (DAMTP) > Acoustic-vortical-entropic generations and their influences on thermoacoustic instability in a nonuniform-radius combustor with moving flame front

Acoustic-vortical-entropic generations and their influences on thermoacoustic instability in a nonuniform-radius combustor with moving flame front

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Matthew Priddin.

It is widely known that unsteady combustion flame front generates acoustic, vortical and entropic disturbances. Previous research shows that an interaction between unsteady heat release and fluid disturbance near the flame front may result in, to some extent, intrinsic thermoacoustic instability. Meanwhile, interactions between acoustic modes of combustor cavity and unsteady heat release may generate combustor-induced thermoacoustic instabilities. Their features have been comprehensively analyzed in a uniform-radius combustor with a stationary flame front. The author gives mathematical modeling of a nonuniform-radius combustor where the flame front is moving. Three tasks are addressed in this talk. Firstly, quasi-one-dimensional mathematical modeling of disturbance generation of acoustic, entropic and vortical modes caused by unsteady heat release are given under the consideration of flow separation due to nonuniform-radius combustor. Secondly, their effects on the intrinsic and combustor-induced thermoacoustic instabilities are mathematically modeled. Finally, attentions are imposed on the interactions between these two types of thermoacoustic oscillations.

This talk is part of the Waves Group (DAMTP) series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2019 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity