Instability Free Three-Dimensional Hypersonic Laminar Boundary-Layer Steady States for Linear and Nonlinear Stability Analyses
Abstract
The major goal of this research project is to investigate the numerical computation of disturbance free and accurate steady-states for high-speed flows. Doing so is quite challenging due to physical and numerical reasons that are often intertwined. A major reason, also present in their low- speed counterparts, is related to disturbance growth due to physical instabilities in the flow. This means numerical simulations must be able to dampen these disturbances in order to reach disturbance free steady-states, i.e. they must be numerically stable even when the flow is physical unstable. Another major reason, now unique to high-speed flows, comes from compressibility effects, which are introduced by high temperature gradients and/or high Mach numbers, in the case of pure substances. These effects create many flow features, such as acoustic waves, shock waves, expansion fans, contact discontinuities and so on. This means numerical simulations must be able to properly capture such features in order to reach accurate steady-states. The procedures required to achieve steady-states with both characteristics are discussed in detail in this report.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 22, 2024
- Accession Number
- AD1229680
Entities
People
- Leonardo Alves
Organizations
- Fluminense Federal University