On large-scale vortex structures and flame front corrugations in swirling jets with combustion

Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

The present paper reports on planar optical measurements of coherent structures in a swirling jet with vortex breakdown and combustion. Two configurations of the atmospheric propane/air swirling flames are considered, namely, fuel-lean premixed and fuel-rich partially premixed flames. Deformations of the flame front are visualized by planar laser-induced fluorescence (PLIF) of HCHO. The instantaneous velocity fields are measured by particle image velocimetry (PIV). For extraction of coherent structures from the data sets, they are processed by proper orthogonal decomposition (POD). The instantaneous PLIF snapshots showed that the flame fronts were strongly corrugated by turbulent fluctuations. The POD analysis of both PIV and PLIF data sets revealed spatial modes of large-scale deformations of the reaction zone. From the analysis of the PIV data it was found that these modes were caused by two different types of hydrodynamics flow instabilities. One of them corresponded to large-scale vortex structures due to centrifugal instability of the swirling jet flow and breakdown of the vortex core. Another mode was related to unsteady longitudinal velocity fluctuations caused by the upward plume oscillations driven by buoyancy effect.

Язык оригиналаанглийский
Название основной публикацииHeat and Mass Transfer and Hydrodynamics in Swirling Flows, HMTHSF 2019
Подзаголовок основной публикацииProceedings of the 7th International Conference
РедакторыAlexander I. Leontiev, Yuriy A. Kuzma-Kichta, Shota A. Piralishvili, Sergey V. Veretennikov, Oleg A. Evdokimov
ИздательAmerican Institute of Physics Inc.
ISBN (электронное издание)9780735419629
DOI
СостояниеОпубликовано - 31 мар 2020
Событие7th International Conference on Heat and Mass Transfer and Hydrodynamics in Swirling Flows, HMTHSF 2019 - Rybinsk, Российская Федерация
Продолжительность: 16 окт 201918 окт 2019

Серия публикаций

НазваниеAIP Conference Proceedings
Том2211
ISSN (печатное издание)0094-243X
ISSN (электронное издание)1551-7616

Конференция

Конференция7th International Conference on Heat and Mass Transfer and Hydrodynamics in Swirling Flows, HMTHSF 2019
СтранаРоссийская Федерация
ГородRybinsk
Период16.10.201918.10.2019

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    Markovich, D., & Dulin, V. (2020). On large-scale vortex structures and flame front corrugations in swirling jets with combustion. В A. I. Leontiev, Y. A. Kuzma-Kichta, S. A. Piralishvili, S. V. Veretennikov, & O. A. Evdokimov (Ред.), Heat and Mass Transfer and Hydrodynamics in Swirling Flows, HMTHSF 2019: Proceedings of the 7th International Conference [020001] (AIP Conference Proceedings; Том 2211). American Institute of Physics Inc.. https://doi.org/10.1063/5.0001025