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Proceedings Paper

Dynamic characterization of an industrial burner in working conditions by laser Doppler vibrometry
Author(s): Nicola Paone; Gian Marco Revel
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Paper Abstract

The paper presents the application of a laser Doppler vibrometer in order to characterize the dynamic behavior of a burner during normal working conditions. The burner is a 1:4 scale model of a real CH4 industrial burner for gas turbines, with a 120 kW power. A first series of test has been performed in order to determine the resonance frequencies of burner components, in such a way as to correlate the results achieved in working conditions with the characteristics of the structure. In a second series of tests the burner has been tested in exercise, firstly with only a cold jet of air flowing from the nozzle, then in real working conditions. In each test both vibration and acoustic measurements have been performed, in order to find correlation between combustion noise and structural vibrations. The laser Doppler vibrometer has been chosen to carry out measurements on the burner because of its capability of 'remotely' and non-intrusively determine vibrations. In order to assess the accuracy of vibrometer measurements through the flame, a theoretical model previously developed by the authors has been employed, which describes the interactions between laser interferometer and refractive index variations induced by the flame, in such a way as to estimate interfering and modifying inputs of the measurements system.

Paper Details

Date Published: 1 June 1998
PDF: 10 pages
Proc. SPIE 3411, Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (1 June 1998); doi: 10.1117/12.307724
Show Author Affiliations
Nicola Paone, Univ. degli Studi di Ancona (Italy)
Gian Marco Revel, Univ. degli Studi di Ancona (Italy)

Published in SPIE Proceedings Vol. 3411:
Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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