Thermo-acoustics and its detection in a premixed flame
Abstract
A new optical technique based on light-matter interaction is devised in-house to detect thermo-acoustic disturbances generated after ignition and during propagation of a premixed flame front in a half open channel. The technique involves passing a polarized laser light through a medium whose density or refractive index varies due to the passage of acoustic waves and/or flame front and then capturing the leaked depolarised light through an analyser by a photo-detector. The technique is applied to combustor involving premixed flame propagation and tulip inversion. The thermo-acoustic signals and the flame front are distinguished by comparing the oscilloscope signal with high speed photography of the flow-field. Acoustic waves are found to intercept the flame propagation at various axial locations and time instants.
Keywords
Cite
@article{arxiv.2208.02146,
title = {Thermo-acoustics and its detection in a premixed flame},
author = {Ratan Joarder and Siba P. Choudhury and Syam S. and Nagendra Singh and S. K. Biswas},
journal= {arXiv preprint arXiv:2208.02146},
year = {2022}
}