INFLUENCE OF PRESSURE GRADIENT ON FLAME-VORTEX INTERACTION AND FLAME STABILITY

Yagiz Yalcinkaya, Ogeday E. Bozkurt, Ayse G. Gungor*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

This study presents numerical investigations of turbulent premixed bluff-body stabilized flame by emphasizing the influence of pressure gradient on flame-vortex interaction and flame stability for lean combustion applications. Large eddy simulations of four different geometrical configurations, diffuser 3?, diffuser 1.5?, nominal, and nozzle that resulted in mild to strong pressure gradients are presented. Numerical investigations allowed determining the effects of geometry-induced pressure gradient on the flame structure, development of the flame-front vorticity and turbulent structures and flame stabilization. It is shown that the pressure gradient plays a key role for the spatial and temporal development of the flame front vorticity and baroclinic torque. The flow deceleration in diffuser geometries suppresses the flame-induced vorticity mechanisms, which in turn lead to large wrinkle forms of the flame and may lead to local extinctions along the flame front. The favorable pressure gradient in the nozzle geometry, on the contrary, increases the baroclinic torque that restrains the development of the shear layer vorticity and hence prevents local extinctions.

Original languageEnglish
Title of host publicationCombustion, Fuels, and Emissions
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791886007
DOIs
Publication statusPublished - 2022
EventASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022 - Rotterdam, Netherlands
Duration: 13 Jun 202217 Jun 2022

Publication series

NameProceedings of the ASME Turbo Expo
Volume3-B

Conference

ConferenceASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022
Country/TerritoryNetherlands
CityRotterdam
Period13/06/2217/06/22

Bibliographical note

Publisher Copyright:
Copyright © 2022 by ASME.

Fingerprint

Dive into the research topics of 'INFLUENCE OF PRESSURE GRADIENT ON FLAME-VORTEX INTERACTION AND FLAME STABILITY'. Together they form a unique fingerprint.

Cite this