What is it about?

We investigate the effectiveness of the slotted vortex generator, a relatively new concept, in reducing flow-separation due to oblique shock/boundary-layer interaction in a Mach 4.0 intake.

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Why is it important?

Although a lot of numerical studies have investigated flow-separation control using vortex generators in SBLIs, most of these have used idealized domains (rectangular) with a primarily 2D flow in the absence of the vortex generator. We try to see how effective the vortex generator is in a realistic setting, especially in the presence of sidewall boundary layers, and try to find the best position of the VG along the length and span of the intake.

Perspectives

I believe this work throws important light on the optimal use of vortex generators as a flow control device in a realistic setting. It shows that the optimal device spacing determined through studies that use idealized domains with periodic boundary conditions along the span may not be suitable in a real inlet as the width of the inlet and the presence of the sidewall boundary layers play an important role.

Santanu Ghosh
Indian Institute of Technology Madras

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This page is a summary of: Flow Control in Mach 4.0 Inlet by Slotted Wedge-Shaped Vortex Generators, Journal of Propulsion and Power, November 2017, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/1.b36314.
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