English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The present study is an experimental investigation on the e ffect of axial and transverse acoustic forcing on a generic swirl flow. The aim is to provide a qualitative understanding of typical swirl flow response to transverse acoustic forcing, for a better understanding of the response of swirl-stabilized flames to the same configuration of acoustic forcing. The latter is critical for the ongoing research on thermoacoustic instability in annular gas turbine combustors. A single burner test-rig with transverse extensions to facilitate transverse acoustic modes is employed in this experimental study. The swirl flow, established using a generic radial swirl generator, features vortex breakdown. Two transverse forcing configurations are studied: a) symmetric forcing which leads to a pressure antinode at the burner, and, b) antisymmetric forcing which results in a velocity antinode at the burner location. The study is based on results from planar streamwise and crosswise flow field measurements. We find that while the symmetric forcing configuration causes a flow response similar to axial forcing, antisymmetric forcing results in a helical response.

Swirl flow response to transverse and axial acoustic forcing