Estudio aerodinámico computacional en la entrada de un scramjet aplicando el efecto tubérculo

Abstract

This paper is based on the implementation of biomimetics, specifically the Tubercle Effect that usually occurs in the leading edge of the humpback whale’s (Megaptera novaeangliae) fins, allowing it to increase its thrust by funneling the flow. These characteristics are therefore analyzed in the Brazilian hypersonic vehicle (VHA 14-X-B), which is an experimental aircraft that operates at speeds over MACH 7, and atmosphere conditions of 30 km of altitude, powered by a scramjet. In order to increase the performance properties of the AHV (Aerospace Hypersonic Vehicle), we verify the feasibility of implementing the tubercle effect in its intake device (compression stage). The study analyzes the aero- thermodynamics of the machine, using computer simulation software ANSYS-FLUENT, where different tubercles configurations are proposed, with variations in geometry and in the position on the aircraft. Afterwards, the atmospheric conditions in which the AHV operates are simulated, modifying different angles of attack that the aircraft has during its operation. Results showed that there’s more efficiency in negative angles, increasing fluid properties such as pressure, density and temperature.

Keywords

• aerospace propulsion systems
• biomimetic
• supersonic aerodynamics
• scramjet
• tubercle effect