Micromachines 2012, 3(2), 364-378; doi:10.3390/mi3020364
Article

Micro-Ramps for Hypersonic Flow Control

1email, 2email, 1email and 2,* email
Received: 3 March 2012; in revised form: 27 March 2012 / Accepted: 19 April 2012 / Published: 26 April 2012
(This article belongs to the Special Issue Micro Flow Controllers)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: 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.
Keywords: micro-ramp; micro-vortex-generator; shock-boundary layer interaction; hypersonic; flow control
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MDPI and ACS Style

Saad, M.R.; Zare-Behtash, H.; Che-Idris, A.; Kontis, K. Micro-Ramps for Hypersonic Flow Control. Micromachines 2012, 3, 364-378.

AMA Style

Saad MR, Zare-Behtash H, Che-Idris A, Kontis K. Micro-Ramps for Hypersonic Flow Control. Micromachines. 2012; 3(2):364-378.

Chicago/Turabian Style

Saad, Mohd R.; Zare-Behtash, Hossein; Che-Idris, Azam; Kontis, Konstantinos. 2012. "Micro-Ramps for Hypersonic Flow Control." Micromachines 3, no. 2: 364-378.

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