Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
MODELING AND STRUCTURAL ANALYSIS OF AN ACADEMIC SHOCK TUBE
Submission Author:
William Henrique de Lima Fiuza , SP
Co-Authors:
William Henrique de Lima Fiuza, George Marinho, Paulo Toro, João Carlos Arantes Costa Júnior, Israel Rêgo
Presenter: William Henrique de Lima Fiuza
doi://10.26678/ABCM.COBEM2021.COB2021-1089
Abstract
The shock tube was created at the end of the 19th century for laboratory studies involving different areas of science, and in the mid-1950s it began to be used to simulate flight conditions, present in high-speed flows. Such equipment has been widely adopted for laboratory hypersonic studies since then, as it provides accurate flow data as spacecraft will find in the atmosphere. Simple shock tubes consist of two sessions with a constant area, one high (driver) and one low pressure (driven), the latter the testing session, axially joined and separated by one or two diaphragms. The rupture of the diaphragm produces an axial pressure gradient that causes the propagation of an incident shock wave in the direction of the driven, which is later reflected at the end of this session. The present paper shows the modeling and structural analysis of an academic shock tube, considering its joints, supports and efforts during the tests. The correct dimensioning of the components is essential, as it is equipment that works with high pressures and different gases, in order to avoid accidents and errors in the information obtained in tests. Therefore, it is necessary to model all components in CAD (Computer Aided Design) and CAE (Computer Aided Engineering) software, with subsequent discretization by mesh generation and computational structural analysis by Finite Element Method. Boundary conditions and applied loads must be correctly selected for a good level of confidence in the computational analysis. The choice of materials for the fixing screws, flanges and supports is also addressed during the work, based on economic, mechanical factors, and the feasibility of finding and acquiring such materials. The project is expected to be reliable, academically useful, and economically optimized so that in the future it can be used at the university level, benefiting and encouraging students in the aerospace and mechanical sciences.
Keywords
Shock tube, Shock tube modeling, Numerical structural analysis
