Large-eddy simulation of shock-induced flow separation control using SparkJet concept

Yang, Guang; Yao, Yufeng; Fang, Jian; Gan, Tian; Lu, Lipeng

Abstract

Large-Eddy Simulation (LES) of shock-wave/boundary layer interactions (SWBLI) with SparkJet control technique is carried out in this paper. The base flow is an oblique shock-wave generated by an 8°wedge impinging onto a spatially-developing Mach 2.3 turbulent boundary layer. The numerical approaches are validated by comparing the LES predictions of the base flow with experimental measurements of the same flow conditions. Then a SparkJet actuator is deposited upstream the interaction zone of the base flow to control the shock-induced separation. The thermal effect of electrical discharge is modelled by adding an energy source term in the Navier-Stokes equations. Single-pulsed characteristics of the actuator is studied and compared with experimental data of similar conditions. Detailed flowfield analysis, especially the flow structures near the actuator exit orifice, reveals that the jet stream acts as a virtual “micro vortex generator”, which promotes the turbulent mixing in the boundary layer, thus enhances its ability to resist flow separation. Averaged skin friction coefficient shows that the separation length is reduced by nearly 35% with the SparkJet control.

Citation

Yang, G., Yao, Y., Fang, J., Gan, T., & Lu, L. (2016, January). Large-eddy simulation of shock-induced flow separation control using SparkJet concept. Paper presented at 54th AIAA Aerospace Sciences Meeting, San Diego, California, USA

• Presentation Conference Type: Conference Paper (unpublished)
• Conference Name: 54th AIAA Aerospace Sciences Meeting
• Conference Location: San Diego, California, USA
• Start Date: Jan 4, 2016
• End Date: Jan 8, 2016
• Publication Date: Jan 4, 2016
• Deposit Date: May 27, 2015
• Peer Reviewed: Not Peer Reviewed
• Keywords: large-eddy simulation, SparkJet
• Public URL: https://uwe-repository.worktribe.com/output/915584
• Publisher URL: http://dx.doi.org/10.2514/6.2016-0045
• Additional Information: Title of Conference or Conference Proceedings : 54th AIAA Aerospace Sciences Meeting