Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
COMPARATIVE ANALYSIS OF THE AEROTERMODYNAMIC PROPERTIES OF A GENERIC SCRAMJET DEMONSTRATOR
Submission Author:
Luis Barreto , PE , Brazil
Co-Authors:
Luis Barreto, Gustavo Freire, José de Medeiros, Ramon Carneiro, Angelo Passaro, Paulo Toro
Presenter: Luis Barreto
doi://10.26678/ABCM.COBEM2021.COB2021-0572
Abstract
In 2020, undergraduate students from Aerospace Engineering, at the Universidade Federal do Vale do São Francisco (Juazeiro/BA), began to develop research on hypersonic airbreathing propulsion. In the present work, theoretical-analytical methodology based on equations of the oblique shock wave, and the expansion wave (Prandtl-Meyer) coupled to the area ratio, considering ideal gas (calorically perfect gas), without real gas effects, and inviscid flow (no boundary layer formation), were applied to the compression and expansion sections, respectively, of the preliminary design of a scramjet. Also, numerical simulation (CFD) was developed under the same assumptions (without high temperature and viscous effects) applied in the analytical analysis. In both studies, the heat addition in one-dimensional flow, to simulate the burning of hydrogen fuel with atmospheric air in the combustion chamber at supersonic speed, was not considered. The scramjet vehicle was being designed to operate at an altitude of 20 km at a speed of 1710 m/s, corresponding to Mach number 5.79. The scramjet was composed of three compression ramps and one expansion ramp. The comparison of the analytical and numerical results of the thermodynamic properties, along the scramjet vehicle, showed excellent agreement. Therefore, it is intended, in the near future, to implement the simulation of fuel burning in both studies, theoretical-analytical and theoretical-numerical.
Keywords
Scramjet, hypersonic airbreathing propulsion, analytical analysis, Numerical simulation
