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Actuator Concepts for Active Gust Alleviation on Transport Aircraft at Transonic Speeds

Klug, Lorenz and Radespiel, Rolf and Ullah, Junaid and Seel, Ferdinand and Lutz, Thorsten and Wild, Jochen and Heinrich, Ralf and Streit, Thomas (2020) Actuator Concepts for Active Gust Alleviation on Transport Aircraft at Transonic Speeds. In: AIAA Scitech 2020 Forum. AIAA Scitech 2020 Forum, 06.-10.01.2020, Orlando, FL, USA.

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Official URL: https://arc.aiaa.org/doi/pdf/10.2514/6.2020-0271

Abstract

This paper investigates different concepts for active gust alleviation (GLA) on a generic transport aircraft configuration at transonic speed by means of viscous and inviscid CFD simulations. Four types of dynamic actuator concepts are presented including a fuselage flap, a wing tip flap, a trailing edge flap and a leading edge flap. The wing tip flap is investigated on a forward swept wing configuration being specifically designed for this purpose. The overall aerodynamic effect of the fuselage flap on the lift distribution is relatively small and has significant Phase angles relative to the flap motion. The wing tip flap instead, seems to be a promising approach to alleviate gusts, affecting the lift distribution on the complete wing. The dynamic trailing edge flap and leading edge flap are investigated on a representative 2.5D setup to derive the most effective actuator setup. The 2.5D simulations confirm the potential of the trailing edge flap allowing a compensation of about 95% of gust induced lift increase at moderate incidence angles, while the effect of the droop nose –in the way implemented so far– is much lower. Despite the rather small potential of the leading edge flap regarding lift force preservation, the time history of the pitching moment reveals its favourable effect on eliminating about 50% of the nose up moment induced by the upward deflected flap without significantly affecting the lift Response.

Item URL in elib:https://elib.dlr.de/133208/
Document Type:Conference or Workshop Item (Speech)
Title:Actuator Concepts for Active Gust Alleviation on Transport Aircraft at Transonic Speeds
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Klug, LorenzTU BraunschweigUNSPECIFIED
Radespiel, RolfTU BraunschweigUNSPECIFIED
Ullah, JunaidUniversität StuttgartUNSPECIFIED
Seel, FerdinandUniversität StuttgartUNSPECIFIED
Lutz, ThorstenUniversität StuttgartUNSPECIFIED
Wild, JochenJochen.Wild (at) dlr.dehttps://orcid.org/0000-0002-2303-3214
Heinrich, RalfRalf.Heinrich (at) dlr.deUNSPECIFIED
Streit, ThomasTh.Streit (at) dlr.deUNSPECIFIED
Date:January 2020
Journal or Publication Title:AIAA Scitech 2020 Forum
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:aerodynamics, load alleviation, gust alleviation
Event Title:AIAA Scitech 2020 Forum
Event Location:Orlando, FL, USA
Event Type:international Conference
Event Dates:06.-10.01.2020
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Wild, Dr.-Ing. Jochen
Deposited On:16 Jan 2020 13:22
Last Modified:16 Jan 2020 13:22

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