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Dynamic Gust Load Alleviation Study with Surrogate Models for Transonic Cruise Condition

Govindan, Kuharaaj (2023) Dynamic Gust Load Alleviation Study with Surrogate Models for Transonic Cruise Condition. 57th 3AF International Conference on Applied Aerodynamics (AERO 2023), 29.-31. März 2023, Bordeaux, France.

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This study aims to predict dynamic responses of trailing-edge and droop-nose devices in 2D for a transonic cruise condition using surrogate models. The prepared surrogates, also known as reduced order models, were prepared using the Linear Frequency Domain solver, and are proven to provide quick results for a wide range of flight conditions while being computationally efficient. Three reduced order models were prepared, one for predicting gust load responses for given gust cases, a second purely to predict trailing-edge deflection dynamics responses, and a third to prognose droop-nose device deflection dynamic response. Each surrogate was modelled with 100 dynamic response results based on their respective parameter combinations, prepared as a Halton Sequence of points. The prepared surrogates were evaluated for quality of interpolation via the Leave-One-Out Test, and applied for prognosing three flight cases. The superposition principle was applied to combine the dynamic responses from each surrogate to evaluate the load mitigation capability of the trailing-edge and droop nose devices for the studied flight cases. The surrogate predictions were accurate within -2 orders of magnitude relative to conventional unsteady flow simulations and the results of this gust load alleviation study with the reduced order models are comparable to other studies. This study proves the applicability of surrogate models prepared with the Linear Frequency Domain method, as a knowledge-based engineering approach, to perform aerodynamic studies, relevant to conceptual research as well as industrial needs.

Item URL in elib:https://elib.dlr.de/195036/
Document Type:Conference or Workshop Item (Speech)
Title:Dynamic Gust Load Alleviation Study with Surrogate Models for Transonic Cruise Condition
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Govindan, KuharaajUNSPECIFIEDhttps://orcid.org/0000-0001-8940-4615UNSPECIFIED
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-13
Keywords:Linear frequency domain, LFD, Surrogate modelling, ROM, Computational fluid dynamics, CFD, Load alleviation, Load prediction, Gusts, Gust load alleviation, Trailing edge device, Flap, Control surface, Droop nose device, Hinterkantenklappe, Kippnase, Boe, Boenlastabminderung, Lastabminderung, Ersatzmodel, Steuerflaeche.
Event Title:57th 3AF International Conference on Applied Aerodynamics (AERO 2023)
Event Location:Bordeaux, France
Event Type:international Conference
Event Dates:29.-31. März 2023
Organizer:3AF (Association Aeronautique et. Astronautique de France)
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:17 May 2023 12:11
Last Modified:17 May 2023 12:11

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