Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
AERODYNAMIC ANALYSIS APPLIED TO A HYPERSONIC VEHICLE TYPE WAVERIDER THROUGH CFD
Submission Author:
Rolando Guzmán-Bohórquez , SP , Brazil
Co-Authors:
Rolando Guzmán-Bohórquez, Paulo Greco, Hernán Cerón-Muñoz
Presenter: Rolando Guzmán-Bohórquez
doi://10.26678/ABCM.COBEM2023.COB2023-2028
Abstract
Hypersonic aerodynamics has had a huge interest since its beginnings stemming from all the particular phenomena encountered at very high-speed flight conditions. In the last decades, this practical interest has been increasing due to the possible applications, not only in transport but also in the military field. Nowadays, applied hypersonic aerodynamics captures the attention for the design and development of vehicles that could offer better performance with such conditions at the extreme end of the whole flight spectrum. The waverider is a lifting body, which has an attached shock wave all along its leading edge, producing more lift at lower angles of attack than generic hypersonic vehicles. In this sense, waveriders possess a higher lift-to-drag ratio (L/D) than other hypersonic vehicles. The maximum L/D for a flight vehicle is a measure of its aerodynamic efficiency. That is the reason why the waverider is a promising candidate as a base design for feasible hypersonic vehicles. This paper aims to carry out an aerodynamic analysis of a wedge-derived waverider model, which is based on a previously obtained model through meta-heuristic methods of optimization that attempted to maximize both the aerodynamic efficiency and the payload, characterized by the L/D ratio and the internal volume of the vehicle, respectively. The methodology adopted to do this type of analysis was by solving the governing flow equations for the flow field numerically, through the use of a computational fluid dynamics (CFD) commercial software. Inviscid and viscous CF D simulations were performed to investigate the influence of the inflow at free-stream Mach numbers of M∞ = 5, M∞ = 6, and M∞ = 7 and the angle of attack on the vehicle (AoA = 0 ◦). The objective was to examine the aerodynamic performance in terms of quantitative characteristics such as lift and drag and identify qualitative features such as the boundary layer and shock layer thickness and their respective behaviors, besides the interaction between the boundary layer and the outer inviscid flow, commonly known as viscous interaction. The obtained results are intended to help the generation of a preliminary aerodynamic database and in addition, to validate the obtained waverider models. Therefore, the study of these kinds of optimal preliminary designs of a generalized waverider is of utmost importance as a conceptual basis for the designers of the next hypersonic vehicles, considering that it provides a foreseeable behavior of the vehicle and the flow phenomena present around it.
Keywords
Aerodynamics, hypersonics, hypersonic vehicle, waverider
