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Modelling aileron and spoiler deflections with the linear frequency domain method (LFD) for subsonic flight conditions

Govindan, Kuharaaj and Bier, Niko (2022) Modelling aileron and spoiler deflections with the linear frequency domain method (LFD) for subsonic flight conditions. International Journal of Numerical Methods for Heat and Fluid Flow. Emerald Group Publishing Ltd.. doi: 10.1108/HFF-09-2022-0519. ISSN 0961-5539.

[img] PDF - Postprint version (accepted manuscript)

Official URL: https://dx.doi.org/10.1108/HFF-09-2022-0519


The modelling of two surrogate models for predicting the aerodynamic responses of aileron and spoiler control surface in subsonic flight is presented. The prepared Reduced Order Models prove useful when quick estimations for a large number of variations are required. The LFD Method was used for the simulation study. Each surrogate contained a database of 100 control surface dynamic responses over a spectrum of 200 harmonics computed with LFD. To interpolate new results, the DLR surrogate modelling toolbox, SMARTy was utilized. The database samples were prepared in a Halton Sequence, making interpolation reliable. The surrogate parameter space was the Mach number, Reynolds number, angle of attack, control surface deflection angle, and the control surface chord length. The LFD Method proved effective for the mentioned purpose: the surrogates were accurate, up to 15% of relative error, in reproducing dynamic responses of aileron and spoiler deflections at low speed, within the limitations of flow field linearity, as well as surrogate prediction capability. The restrictions of the surrogate, and the reasoning thereof are also presented in detail in the study. Future load alleviation studies are a potential of the findings here. LFD is an innovative technique for load prediction and alleviation studies. This paper provides a reference for engineers wishing to use the method for the two mentioned control surfaces, or the like.

Item URL in elib:https://elib.dlr.de/191547/
Document Type:Article
Additional Information:This author accepted manuscript is deposited under a Creative Commons Attribution Non-commercial 4.0 International (CC BY-NC) licence. This means that anyone may distribute, adapt, and build upon the work for non-commercial purposes, subject to full attribution. If you wish to use this manuscript for commercial purposes, please contact permissions@emerald.com
Title:Modelling aileron and spoiler deflections with the linear frequency domain method (LFD) for subsonic flight conditions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Govindan, KuharaajUNSPECIFIEDhttps://orcid.org/0000-0001-8940-4615UNSPECIFIED
Date:1 December 2022
Journal or Publication Title:International Journal of Numerical Methods for Heat and Fluid Flow
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:Emerald Group Publishing Ltd.
Keywords:Linear frequency domain, LFD, Surrogate modelling, ROM, Computational fluid dynamics, CFD, Load alleviation, Load prediction, Aileron, Spoiler, Control surface surrogate modelling, Linear frequency domain method
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Aircraft Technologies and Integration
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Govindan, Kuharaaj
Deposited On:09 Dec 2022 11:04
Last Modified:09 Dec 2022 11:04

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