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Large-eddy simulation of shock-wave/turbulent boundary-layer interactions and its control using Sparkjet

Yang, G.; Yao, Yufeng; Fang, Jian; Tian, G.; Lu, L.P.

Large-eddy simulation of shock-wave/turbulent boundary-layer interactions and its control using Sparkjet Thumbnail


Authors

G. Yang

Yufeng Yao Yufeng.Yao@uwe.ac.uk
Professor in Aerospace Engineering

Jian Fang

G. Tian

L.P. Lu



Abstract

Large-eddy simulations (LES) of the oblique impinging shock-wave/flat plate boundary layer interactions at Mach=2.3 and Reδ=20000 were carried out to investigate the underlying flow physics associated with flow separation and shock unsteadiness. The digital filter method was used to generate synthetic inflow turbulence without introducing any artificial low-frequency motions. The LES results were firstly well validated by comparing with the corresponding measurement data. The low-frequency characteristic of separation shock-wave was then studied by analyzing the obtained time sequence of the wall static pressure signals to realize its amplitudes, frequencies and wave-lengths. Finally, the study was extended by integrating with a control module of an active actuator “SparkJet” concept, in order to investigate its influences on the flow separation and the low-frequency motion of shock-wave unsteadiness. The analysis of flow topology and flow structure around separation region reveals that the actuator acts as a fluidic-like vortex generator, promotes the mixing process within the boundary layer, and thus largely elevates the near-wall turbulence kinetic energy level, leading to its enhanced ability to resist the flow separation. Details of the study will be presented in the final full paper.

Journal Article Type Article
Conference Name The Sixth International Symposium on Physics of Fluids (ISPF6)
Start Date Jul 6, 2015
End Date Jul 9, 2015
Publication Date Jul 6, 2016
Deposit Date May 15, 2015
Publicly Available Date Jul 11, 2016
Journal International Journal of Modern Physics: Conference Series
Publisher World Scientific Publishing
Peer Reviewed Peer Reviewed
Volume 42
DOI https://doi.org/10.1142/S2010194516601861
Keywords large-eddy simulation, shock-wave, turbulent boundary-layer interaction, Sparkjet
Public URL https://uwe-repository.worktribe.com/output/909910
Publisher URL http://dx.doi.org/10.1142/S2010194516601861
Additional Information Title of Conference or Conference Proceedings : The Sixth International Symposium on Physics of Fluids (ISPF6)
Contract Date Jul 11, 2016

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