The continuous adjoint method for multi-fidelity hypersonic inlet design
Abstract/Contents
- Abstract
- Hypersonic air-breathing propulsion systems offer greater efficiency through use of atmospheric oxygen rather than on-board compressed oxidizer tanks, for applications including access to space and hypersonic cruise but require significant further development. The high cost of wind tunnel and flight testing motivates the increased use of computer simulations and motivates advancements to these simulation techniques. A number of the challenges remaining in aerospacecraft design and simulation-based design techniques including gradient-based optimization and uncertainty quantification can be addressed by improving on methods of gradient computation. This dissertation focuses on developments towards generalizing a particular method of evaluating sensitivities and gradients (the continuous adjoint method) to a wider range of functions and multi-fidelity flowpath models. The primary contributions of this work are: the development of the continuous adjoint for a generalized outflow-based functional, a framework that utilizes this generalized functional to find the surface sensitivity for objectives defined external to the CFD volume and enabling multi-fidelity flowpath design, a multi-objective adjoint implementation that utilizes the principle of superposition to combine already-implemented functionals, and optimization studies utilizing these methods on a hypersonic inlet modeled using a multi-fidelity flowpath, including a three-dimensional viscous inlet.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2017 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Kline, Heather L | |
|---|---|---|
| Associated with | Stanford University, Department of Aeronautics and Astronautics. | |
| Primary advisor | Alonso, Juan José, 1968- | |
| Thesis advisor | Alonso, Juan José, 1968- | |
| Thesis advisor | Jameson, Antony, 1934- | |
| Thesis advisor | Senesky, Debbie | |
| Advisor | Jameson, Antony, 1934- | |
| Advisor | Senesky, Debbie |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Heather L. Kline. |
|---|---|
| Note | Submitted to the Department of Aeronautics and Astronautics. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2017. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2017 by Heather Louise Kline
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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