High-order implicit large-eddy simulation for transitional aerodynamics flows
Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2016.
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | eng |
| Published: |
Massachusetts Institute of Technology
2016
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/1721.1/105613 |
| _version_ | 1811090442451681280 |
|---|---|
| author | Fernández, Pablo |
| author2 | Jaime Peraire and Ngoc-Cuong Nguyen. |
| author_facet | Jaime Peraire and Ngoc-Cuong Nguyen. Fernández, Pablo |
| author_sort | Fernández, Pablo |
| collection | MIT |
| description | Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2016. |
| first_indexed | 2024-09-23T14:46:14Z |
| format | Thesis |
| id | mit-1721.1/105613 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T14:46:14Z |
| publishDate | 2016 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1056132019-04-11T09:51:30Z High-order implicit large-eddy simulation for transitional aerodynamics flows Fernández, Pablo Jaime Peraire and Ngoc-Cuong Nguyen. Massachusetts Institute of Technology. Department of Aeronautics and Astronautics. Massachusetts Institute of Technology. Department of Aeronautics and Astronautics. Aeronautics and Astronautics. Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2016. Cataloged from PDF version of thesis. Includes bibliographical references (pages 73-77). This thesis presents a high-order Implicit Large-Eddy Simulation (ILES) approach for simulating transitional aerodynamic flows. The approach consists of a hybridized Discontinuous Galerkin (DG) method for the discretization of the Navier-Stokes (NS) equations and a parallel preconditioned Newton-GMRES solver for the resulting nonlinear system of equations. The combination of hybridized DG methods with an efficient solution procedure leads to a high-order accurate NS solver that is competitive to alternative approaches, such as finite volume and finite difference codes, in terms of computational cost. The proposed approach is applied to transitional turbulent flows over a NACA 65-(18)10 compressor cascade and the Eppler 387 wing at Reynolds numbers up to 460,000. Grid convergence studies are presented and the required resolution to capture transition at different Reynolds numbers is investigated. Numerical results show rapid grid convergence and excellent agreement with experimental data. Focus is also placed on analyzing the structure of the boundary layer and the mechanism that causes transition to turbulence. Two-dimensional unstable modes in the form of Tollmien-Schlichting and Kevin-Helmholtz instabilities are found to be responsible for natural transition to turbulence through a laminar separation bubble. In short, this thesis aims to demonstrate the potential of high-order ILES for simulating transitional aerodynamic flows. This will be illustrated through numerical results and supported by theoretical considerations. by Pablo Fernández. S.M. 2016-12-05T19:54:58Z 2016-12-05T19:54:58Z 2016 2016 Thesis http://hdl.handle.net/1721.1/105613 962487674 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 77 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Aeronautics and Astronautics. Fernández, Pablo High-order implicit large-eddy simulation for transitional aerodynamics flows |
| title | High-order implicit large-eddy simulation for transitional aerodynamics flows |
| title_full | High-order implicit large-eddy simulation for transitional aerodynamics flows |
| title_fullStr | High-order implicit large-eddy simulation for transitional aerodynamics flows |
| title_full_unstemmed | High-order implicit large-eddy simulation for transitional aerodynamics flows |
| title_short | High-order implicit large-eddy simulation for transitional aerodynamics flows |
| title_sort | high order implicit large eddy simulation for transitional aerodynamics flows |
| topic | Aeronautics and Astronautics. |
| url | http://hdl.handle.net/1721.1/105613 |
| work_keys_str_mv | AT fernandezpablo highorderimplicitlargeeddysimulationfortransitionalaerodynamicsflows |