Title:
Initial Implementation of an Adjoint CFD Code
for Aeroshell Shape Optimization
Initial Implementation of an Adjoint CFD Code
for Aeroshell Shape Optimization
| dc.contributor.advisor | Braun, Robert D. | |
| dc.contributor.author | Flaherty, Kevin W. | |
| dc.contributor.corporatename | Georgia Institute of Technology. Space Systems Design Lab | |
| dc.date.accessioned | 2024-02-16T14:42:49Z | |
| dc.date.available | 2024-02-16T14:42:49Z | |
| dc.date.issued | 2008-03-05 | |
| dc.description | AE 8900 MS Special Problems Report | |
| dc.description.abstract | Application of computational fluid dynamics to the optimization of aeroshell shapes usually entails high computational cost. Many converged solutions are required to generate gradients and optimize a shape with respect to very few design variables. The benefits of high-fidelity aerodynamic analysis can be reaped early in the design cycle with less computational cost if the traditional direct optimization problem is transformed to an indirect optimization, using optimal control theory. The indirect gradient formulation decouples the effects on the objective function of the design variables and the flow solution. Meaning, all derivatives used to compute the gradient can be generated from a single converged flow solution. Involved in the computation of the gradient is the solution of an adjoint system of PDEs. An incremental approach is developed for the implementation of an adjoint equation solver. The phased approach begins using inexact and computationally costly finite difference derivative calculations. Results are presented for a transonic airfoil and a supersonic wedge to demonstrate that the finite difference gradient is reasonably accurate, providing a meaningful validation as exact numerical derivatives are substituted later in the development cycle. Finally, a roadmap is presented for future implementation of indirect optimization capability for the Euler/Navier-Stokes CFD code, NASCART-GT. | |
| dc.identifier.uri | https://hdl.handle.net/1853/73380 | |
| dc.publisher | Georgia Institute of Technology | |
| dc.rights | Unless otherwise noted, all materials are protected under U.S. Copyright Law and all rights are reserved | |
| dc.rights.metadata | https://creativecommons.org/publicdomain/zero/1.0/ | |
| dc.rights.uri | https://rightsstatements.org/page/InC/1.0/?language=en | |
| dc.title | Initial Implementation of an Adjoint CFD Code for Aeroshell Shape Optimization | |
| dc.type | Text | |
| dc.type.genre | Masters Project | |
| dspace.entity.type | Publication | |
| local.contributor.corporatename | Space Systems Design Laboratory (SSDL) | |
| local.contributor.corporatename | Daniel Guggenheim School of Aerospace Engineering | |
| local.relation.ispartofseries | Master's Projects | |
| local.relation.ispartofseries | Master of Science in Aerospace Engineering | |
| relation.isOrgUnitOfPublication | dc68da3d-4cfe-4508-a4b0-35ba8de923fb | |
| relation.isOrgUnitOfPublication | a348b767-ea7e-4789-af1f-1f1d5925fb65 | |
| relation.isSeriesOfPublication | 09b1c264-93da-4a60-8e57-4eecff715bc6 | |
| relation.isSeriesOfPublication | 09844fbb-b7d9-45e2-95de-849e434a6abc |
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