On The Flame-Generated Vorticity Dynamics Of Bluff-Body-Stabilized Premixed Flames

Keywords

Baroclinic torque; Bluff-body flames; Flame structural dynamics; Flame-generated vorticity; Flame-turbulence interactions; Turbulent premixed combustion

Abstract

This investigation considers the dynamics of flame-generated vorticity for a premixed, submerged bluff-body stabilized flame. Experimentation characterizes the far-field region in particular with a level of detail not previously afforded to this type of flow. Simultaneous particle imaging velocimetry (PIV), Mie scattering and CH ∗ chemiluminescence are used to obtain velocity fields and flame location. Mean static pressure measurements at the combustion chamber wall capture the pressure field. Analysis of the flame fronts in relation to the mean velocity and vorticity fields provides useful insight into the interaction of the flame and the flow. The unique nature of the velocity and vorticity fields and their effect on downstream flame structures are explained by the baroclinic torque generation of vorticity. The coupling that exists among pressure, heat release, and baroclinic generation is acknowledged and will influence strategies for control of the baroclinic mechanism.

Publication Date

9-1-2017

Publication Title

Flow, Turbulence and Combustion

Volume

99

Issue

2

Number of Pages

487-509

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s10494-017-9822-1

Socpus ID

85020262476 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85020262476

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