Interaction of shear layer coherent structures and the stand-off shock of an under-expanded circular impinging jet

Paul Stegeman, Julio Soria, Andrew Ooi

Research output: Chapter in Book/Report/Conference proceedingChapter (Book)Researchpeer-review

7 Citations (Scopus)


This study looks specifically at the energy transformations that occur during the interaction of strong shear layer coherent structures with the stand off shock. Time resolved data has been produced from high fidelity large-eddy simulations at a nozzle pressure ratio of NPR=3.4 and impingement surface stand-off distance of z=5d . Two dominant instability modes have been analysed using the velocity fluctuation energy density in the shear layer. Stand-off shock position statistics have been found as a function of radial position. Comparison of the shear layer pressure fluctuations and shock position fluctuation through a magnitude squared coherence analysis has been performed. It has been shown that the correlation of the initial shear layer pressure fluctuations and shock position is moderate at the dominant mode Strouhal numbers.
Original languageEnglish
Title of host publicationFluid-Structure-Sound Interactions and Control
Subtitle of host publicationProceedings of the 3rd Symposium on Fluid-Structure-Sound Interactions and Control
EditorsYu Zhou, Yang Liu, A.D. Lucey, Lixi Huang
Place of PublicationHeidelberg
Number of pages5
VolumePart F3
ISBN (Electronic)9783662488683
ISBN (Print)9783662488669
Publication statusPublished - 2016
EventSymposium on Fluid-Structure-Sound Interactions and Control 2015 - Perth, Australia
Duration: 5 Jul 20159 Jul 2015
Conference number: 3rd

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364


ConferenceSymposium on Fluid-Structure-Sound Interactions and Control 2015
Abbreviated titleFSSIC 2015

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