A discrete adjoint framework for trailing-edge noise minimization via porous material

BY Zhou, SR Koh, NR Gauger, M Meinke, W Schöder - Computers & Fluids, 2018 - Elsevier
A discrete adjoint framework on the basis of algorithmic differentiation (AD) is developed for
trailing-edge noise minimization. Turbulent flow through porous media is modeled based on …

Unsteady continuous adjoint to URANS coupled with FW-H analogy for aeroacoustic shape optimization

M Monfaredi, X Trompoukis, K Tsiakas… - Computers & …, 2021 - Elsevier
In this paper, an unsteady aeroacoustic shape optimization tool is presented based on the
continuous adjoint method. Aeroacoustic noise radiated by bodies in unsteady flows can be …

Aeroacoustic and Aerodynamic Adjoint-Based Shape Optimization of an Axisymmetric Aero-Engine Intake

M Monfaredi, V Asouti, X Trompoukis, K Tsiakas… - Aerospace, 2023 - mdpi.com
A continuous adjoint-based aeroacoustic optimization, based on a hybrid model including
the Ffowcs Williams–Hawkings (FW–H) acoustic analogy, to account for the multidisciplinary …

Efficient airframe noise reduction framework via adjoint-based shape optimization

BY Zhou, T Albring, NR Gauger, CR da Silva… - AIAA Journal, 2021 - arc.aiaa.org
This paper presents an efficient adjoint-based shape optimization framework for airframe
noise reduction in which algorithmic differentiation (AD) is applied to the open-source …

Sensitivity analysis of limit cycle oscillations

JA Krakos, Q Wang, SR Hall, DL Darmofal - Journal of Computational …, 2012 - Elsevier
Many unsteady problems equilibrate to periodic behavior. For these problems the sensitivity
of periodic outputs to system parameters are often desired, and must be estimated from a …

[图书][B] Development of high-order CENO finite-volume schemes with block-based adaptive mesh refinement

L Ivan - 2011 - library-archives.canada.ca
Abstract<? Pub Inc> A high-order central essentially non-oscillatory (CENO) finite-volume
scheme in combination with a block-based adaptive mesh refinement (AMR) algorithm is …

Efficient design optimization of acoustic liners for engine noise reduction

E Özkaya, NR Gauger, JA Hay, F Thiele - AIAA Journal, 2020 - arc.aiaa.org
Engine noise reduction using acoustic liner panels is an established technology in the
design of bypass turbofan engines. Using acoustic impedance modeling techniques in …

Adjoint sensitivity formulation for discontinuous Galerkin discretizations in unsteady inviscid flow problems

L Wang, DJ Mavriplis, WK Anderson - AIAA journal, 2010 - arc.aiaa.org
HIGH-ORDER discontinuous Galerkin (DG) methods have become a popular approach over
the last decade in solving a variety of computational fluid dynamics problems [1–6]. The …

An adjoint-based derivative evaluation method for time-dependent aeroelastic optimization of flexible aircraft

G Kennedy, JRRA Martins - 54th AIAA/ASME/ASCE/AHS/ASC …, 2013 - arc.aiaa.org
The goal of this paper is to develop techniques to enable the use of aeroelastic constraints
within a high-fidelity design optimization framework. As a first-step towards this goal we have …

Aerodynamic shape optimization for unsteady flows: some benchmark problems

KP Apponsah, DW Zingg - AIAA Scitech 2020 Forum, 2020 - arc.aiaa.org
We present an efficient aerodynamic shape optimization framework for optimization
problems under unsteady flow conditions. The optimization framework consists of a parallel …