Shockwave-boundary layer interaction control by plasma aerodynamic actuation：An experimental investigation

doi:10.1088/1674-1056/23/7/075210

Abstract The potential of controlling shockwave-boundary layer interactions (SWBLIs) in air by plasma aerodynamic actuation is demonstrated. Experiments are conducted in a Mach 3 in-draft air tunnel. The separation-inducing shock is generated with a diamond-shaped shockwave generator located on the wall opposite to the surface electrodes, and the flow properties are studied with schlieren imaging and static wall pressure probes. The measurements show that the separation phenomenon is weakened with the plasma aerodynamic actuation, which is observed to have significant control authority over the interaction. The main effect is the displacement of the reflected shock. Perturbations of incident and reflected oblique shocks interacting with the separation bubble in a rectangular cross section supersonic test section are produced by the plasma actuation. This interaction results in a reduction of the separation bubble size, as detected by phase-lock schlieren images. The measured static wall pressure also shows that the separation-inducing shock is restrained. Our results suggest that the boundary layer separation control through heating is the primary control mechanism.

Keywords: shock boundary layer plasma flow control

Received: 17 December 2013
Revised: 07 March 2014
Accepted manuscript online:

PACS:	52.50.Nr	(Plasma heating by DC fields; ohmic heating, arcs)
	52.80.Mg	(Arcs; sparks; lightning; atmospheric electricity)
	47.80.Jk	(Flow visualization and imaging)

Fund: Project supported by the Key Program of the National Natural Science Foundation of China (Grant No. 51336011) and the National Natural Science Foundation of China (Grant Nos. 51207169 and 51276197).

Corresponding Authors: Sun Quan
E-mail: steve5761@126.com

About author: 52.50.Nr; 52.80.Mg; 47.80.Jk

Cite this article:

Sun Quan (孙权), Cui Wei (崔巍), Li Ying-Hong (李应红), Cheng Bang-Qin (程邦勤), Jin Di (金迪), Li Jun (李军) Shockwave-boundary layer interaction control by plasma aerodynamic actuation：An experimental investigation 2014 Chin. Phys. B 23 075210

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