Investigation of transfer processes in swirling flows in application to vortex furnaces for coal fuel

Описание

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.1016/j.ijthermalsci.2020.106715

Ключевые слова: aerodynamics, four-vortex furnace, laboratory experiment, numerical modeling, piv, swirl flow structure

Аннотация: In this work, the swirling flow structure was studied experimentally and numerically in a wide range of operating parameters at a laboratory model of the promising furnace of pulverized-coal boiler with a four-vortex combustion circuit. The basic aerodynamic features of construction, affecting the efficiency of fuel combustion, werПоказать полностьюe investigated by the example of air under the atmospheric pressure (Re ~ 104) for the isothermal case. The data on distribution of averaged and pulsation velocity characteristics were experimentally obtained in various areas of the model using the non-contact PIV method (Particle Image Velocimetry). The results of measurements carried out in a wide range of initial velocities allow distinguishing three flow regimes (β is the ratio of flow velocities at the outlet of the side and frontal nozzles): the flow regime with regular structure (four symmetric vortices, β ≥ 1.8), the transitional regime (1.8>β > 0.9) and regimes with irregular vortex structure (β ≤ 0.9). It is shown that formation of irregular structures is associated with uneven organization of air supply to the model. In regimes with β

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Издание

Журнал: International Journal of Thermal Sciences

Выпуск журнала: Vol. 161

Номера страниц: 106715

ISSN журнала: 12900729

Издатель: Elsevier Masson s.r.l.

Авторы

  • Dekterev A.A. (Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russian Federation, Siberian Federal University, Krasnoyarsk, Russian Federation)
  • Kuznetsov V.A. (Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russian Federation, Siberian Federal University, Krasnoyarsk, Russian Federation)
  • Dekterev A.A. (Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russian Federation, Siberian Federal University, Krasnoyarsk, Russian Federation)
  • Shadrin E.Y. (Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russian Federation)
  • Kuznetsov V.A. (Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russian Federation, Siberian Federal University, Krasnoyarsk, Russian Federation)
  • Sharypov O.V. (Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russian Federation)
  • Boyko E.E. (Novosibirsk State Technical University, Novosibirsk, Russian Federation)
  • Naumov I.V. (Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russian Federation)
  • Kabardin I.K. (Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russian Federation)

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