Optical investigation of thermo-acoustic instabilities in turbulent flames

R. Bruschi, E. Giacomazzi, E. Giulietti, T. Pagliaroli, C. Stringola, M. Nobili

Research output: Contribution to conferencePaper

4 Citations (Scopus)

Abstract

Nowadays, analysis of both fluid-dynamic and thermo-acoustic instabilities is of industrial interest; new strategies and instruments to capture and foresee the onset of instabilities are strategic for active control of combustion. In fact, this is a major concern for future combustors, as they will tend to employ some form of premixing to reduce NOx. In this paper investigation of thermo-acoustic instabilities is mainly carried out by means of photo-diodes with some support of pressure transducers. The analysis is performed over three burners, premixed and nonpremixed, fed with different fuels and with power ranging from 250 kW to 500 kW. Spectra and correlations of radiant energy are examined. Results show that radiant energy signal is sufficient to characterize the operating mode of a burner, stable or unstable, and in particular, it can be used for early detection of thermo-acoustic instabilities. © 2007 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
Original languageEnglish
Publication statusPublished - 2007
Event13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference) - , Italy
Duration: 1 Jan 2007 → …

Conference

Conference13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference)
CountryItaly
Period1/1/07 → …

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All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Mechanical Engineering

Cite this

Bruschi, R., Giacomazzi, E., Giulietti, E., Pagliaroli, T., Stringola, C., & Nobili, M. (2007). Optical investigation of thermo-acoustic instabilities in turbulent flames. Paper presented at 13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), Italy.