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

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

A. S. Lobasov
Siberian Federal University, Krasnoyarsk, 660041, Russia; Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, 630090, Russia

D. K. Sharaborin
Novosibirsk State University, Novosibirsk, 630090, Russia; Kutateladze Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russia

Vladimir M. Dulin
Kutateladze Institute of Thermophysics, 1, Lavrentyev Avenue, Novosibirsk, 630090, Russia; Department of Science and Research, Novosibirsk State University 2, Pirogova Street, 630090, Russia

I. M. Vereshchagin
Soloviev Rybinsk State Aviation Technical University, 162934, Rybinsk, Russia

Shota Alexsandrovich Piralishvili
Rybinsk P. A. Solov'ev State Aviation Technological Academy, 53 Pushkin str., Rybinsk, 152934, Russia

Dmitriy M. Markovich
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences (IT SB RAS), 1, Lavrentyev Ave., Novosibirsk, 630090, Russia; Department of Physics, Novosibirsk State University (NSU), 1, Pirogov Str., Novosibirsk, 630090, Russia; Institute of Power Engineering, Tomsk Polytechnic University (TPU), 30, Lenin Ave., Tomsk, 634050, Russia

Sinopsis

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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