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THMT-15. Proceedings of the Eighth International Symposium On Turbulence Heat and Mass Transfer
September, 15-18, 2015, Sarajevo, Bosnia and Herzegovina

DOI: 10.1615/ICHMT.2015.THMT-15


ISBN Print: 978-1-56700-427-4

ISBN CD: 978-1-56700-428-8

Investigation of unsteady reacting flow in a swirl burner by planar optical techniques and POD

pages 459-462
DOI: 10.1615/ICHMT.2015.THMT-15.950
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RÉSUMÉ

Unsteady flow phenomena, such as precessing vortex core, are typical for flows in swirl burners. In some cases strong unsteady flow motion can be beneficial for stabilization of flames, since the system will be less sensitive to external perturbations. The aim of the present study is to investigate in details unsteady features of the non-reacting and reacting flow for a swirl burner, which is characterized by quasi-periodic pressure oscillations in a wide range of flow rates. Modern planar laser-based methods are used to measure spatial distributions of the instantaneous velocity, passive scalar, and temperature, and to detect the flame front profile. In order to reveal coherent patterns, the fields are processed by proper orthogonal decomposition.

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