Discrete Adjoint-Based Simultaneous Analysis and Design Approach for Conceptual Aerodynamic Optimization
Journal Title: INCAS BULLETIN - Year 2017, Vol 9, Issue 3
Abstract
In this paper, a simultaneous analysis and design method is derived and applied for a non-linear constrained aerodynamic optimization problem. The method is based on the approach of defining a Lagrange functional based on the objective function and the aerodynamic model’s equations, using two sets of multipliers. A fully-coupled, non-linear system of equations is derived by requiring that the Gateaux variation of the Lagrange functional vanishes for arbitrary variations of the aerodynamic model’s dependent variables and design parameters. The optimization problem is approached using a one-shot technique, by solving the non-linear system in which all sensitivities and problem constraints are included. The computational efficiency of the method is compared against a gradient-based optimization algorithm using adjoint-provided gradient. A conceptual-stage aerodynamic optimization problem is solved, based on a non-linear numerical lifting-line method with viscous corrections.
Authors and Affiliations
Oliviu SUGAR-GABOR
Keywords
Related Articles
- EP ID EP294091
- DOI 10.13111/2066-8201.2017.9.3.11
- Views 48
- Downloads 0
[b]The problem of incompressible jets with curvilinear walls[/b]
The jet flow problem concerning the discharge of a fluid (from an orifice in a container) into the atmosphere is studied herein in the framework of the Helmholtz-Kirchhoff model. The problem is reduced to the study of a...
Nonlinear automatic control of the satellites by using the quaternion and the angular velocities’ vectors
In this paper, the authors propose a new architecture for the control of the satellites’ attitude by using a control law mainly based on a proportional-integrator component with respect to the quaternion vector and to th...
Airline Applications of Business Intelligence Systems
Airline industry is characterized by large quantities of complex, unstructured and rapid changing data that can be categorized as big data, requiring specialized analysis tools to explore it with the purpose of obtaining...
Modelling the wear processes of the automotive brake pad and disc
The automotive disc braking system is based on the friction between a disc and two pads and this friction determines their wear. The theoretical study proposed in this paper aims to model this wear process. It is based o...
Verification of Checking of the Validity and Effectiveness of Damage
This paper presents a methodology for identifying some stress concentrators based on the modal analysis performed using MSC Patran and MSC Nastran programs. The influence of a beam crack on its own frequency is practical...