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

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

Content Provider	Semantic Scholar
Author	Yang, Guang Yao, Yufeng Fang, Jian. Tian, G. Lu, Lipeng
Copyright Year	2016
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.
Starting Page	1660186
Ending Page	1660186
Page Count	1
File Format	PDF HTM / HTML
DOI	10.1142/S2010194516601861
Volume Number	42
Alternate Webpage(s)	http://eprints.uwe.ac.uk/25543/7/s2010194516601861.pdf
Alternate Webpage(s)	https://doi.org/10.1142/S2010194516601861
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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