Design efficiency evaluation for transonic airfoil optimization: A case for Navier-Stokes design

Date

1993-01-01

Author

Hager, J.O.
Eyi, Sinan
Lee, K.D.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

71
views

0
downloads

© 1993 by the American Institue of Aeronautics and Aerodynamics, Inc. All Rights reserved.A constrained-optimization design method which improves the aerodynamic performance of transonic airfoils is evaluated from a design-quality and designefficiency viewpoint. Design efficiency is a measure of the performance improvement and the design time (CPU time). Total-airfoil design and upper-surface design are performed using the Euler and Navier-Stokes equations with several grids, and are evaluated using the Navier-Stokes equations to determine the anticipated physical design response. Even though the cost of the Euler design is lower than Navier-Stokes design, the Navier-Stokes evaluation indicates that the Euler design does not necessarily improve the aerodynamic performance. Therefore, the design optimization should be based on an accurate flow simulation to achieve an actual performance improvement, and the design time is a secondary concern.

URI

https://hdl.handle.net/11511/69548

DOI

https://doi.org/10.2514/6.1993-3112

Collections

Department of Aerospace Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

A viscous-inviscid interaction method for 2-D unsteady, compressible flows Tuncer, İsmail Hakkı; Platzer, Max F. (1993-01-01) © 1993 American Institute of Aeronautics and Aerodynamics, Inc. All rights reserved.A Navier-Stokes/potential flow interactive solution method suitable for the solution of steady-state and unsteady flowfields around airfoils has been developed. The Navier-Stokes equations are solved in the close proximity of an airfoil and in its wake. The inviscid flowfield surrounding the viscous flow regions is assumed to be irrotational and isentropic. In the inviscid flow region, the potential flow equations, which are...
Efficiency improvement in sensitivity evaluation in aerodynamic shape optimization Eyi, Sinan (1996-01-01) © 1996 by the American Institute of Aeronautics and Astronautics, Inc. All rights resewed.The paper presents two methods that improve the accuracy and reduce the computational cost in evaluating finite-difference sensitivities for aerodynamic shape optimization. The first method is a modified finite-difference approach that improves the accuracy of sensitivities at a reduced cost using an improved iteration strategy. The second method finds the optimum perturbation size based on an asymptotic error formula....
Design and control of a micro UAV Kaya, Derya; Büyükkoçak, Ali Tevfik; Kutay, Ali Türker; Tekinalp, Ozan (2016-01-01) © 2016 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.This study presents different linear controllers for the flight control of a quadrotor with fixed-pitch propellers. The quadrotor propulsion system model is based on the experiments carried out previously. As a continuation of previous study, design of a 4 kg quadrotor vehicle is completed. In addition, three linear controllers namely proportional plus derivative controller, linear quadratic regulator, and linear quad...
Structural dynamics analysis and passive control of wind turbine vibrations with tuned mass damper (TMD) technique Farsadi, Touraj; Kayran, Altan (2016-01-01) © 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.This paper investigates the use of a passive control device, tuned mass damper (TMD) for the control of vibrations of a simplified wind turbine. In the wind turbine model, tower and blades are modeled with continuous beam structure. Concentrated mass is considered as the nacelle. TMD system is placed at top of tower and attached to the nacelle. The coupled governing equation of motions and associated boundary condition...
Multidisciplinary optimization and performance analysis tool for ballistic missiles Adsız, Mısra Ayşe; Kutay, Ali Türker (2019-01-01) © 2019 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.During rocket/missile system design process, system design must be made in accordance with military standards, which have very strict rules. Product delivery dates usually are very rigid. Despite this, during conceptual design, requirements are often updated within the design process that requires the design to be updated frequently. It is essential to perform these steps as efficiently and quickly as possible. The pr...

Citation Formats

J. O. Hager, S. Eyi, and K. D. Lee, “Design efficiency evaluation for transonic airfoil optimization: A case for Navier-Stokes design,” 1993, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/69548.