Micro-ramps for hypersonic flow control

Saad, M.R., Zare-Behtash, H. , Che Idris, A. and Kontis, K. (2012) Micro-ramps for hypersonic flow control. Micromachines, 3, pp. 364-378. (doi: 10.3390/mi3020364)

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Shock/boundary layer interaction (SBLI) is an undesirable phenomenon, occurring in high-speed propulsion systems. The conventional method to manipulate and control SBLI is using a bleed system that involves the removal of a certain amount of mass of the inlet flow to control boundary layer separation. However, the system requires a larger nacelle to compensate the mass loss, larger nacelles contribute to additional weight and drag and reduce the overall performance. This study investigates a novel type of flow control device called micro-ramps, a part of the micro vortex generators (VGs) family that intends to replace the bleed technique. Micro-ramps produce pairs of counter-rotating streamwise vortices, which help to suppress SBLI and reduce the chances of flow separation. Experiments were done at Mach 5 with two micro-ramp models of different sizes. Schlieren photography, surface flow visualization and infrared thermography were used in this investigation. The results revealed the detailed flow characteristics of the micro-ramp, such as the primary and secondary vortices. This helps us to understand the overall flow physics of micro-ramps in hypersonic flow and their application for SBLI control.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Zare-Behtash, Dr Hossein
Authors: Saad, M.R., Zare-Behtash, H., Che Idris, A., and Kontis, K.
College/School:College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity
Journal Name:Micromachines
ISSN (Online):2072-666X

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