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