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Flow simulation of the flight manoeuvres of a large transport aircraft with load alleviation

Published online by Cambridge University Press:  28 October 2021

C. Breitenstein Open the ORCID record for C. Breitenstein [Opens in a new window]  and
R. Radespiel
C. Breitenstein*
Affiliation:
Technische Universität Braunschweig, Institut für Strömungsmechanik, Braunschweig, Germany
R. Radespiel
Affiliation:
Technische Universität Braunschweig, Institut für Strömungsmechanik, Braunschweig, Germany
*
E-mail: [email protected]
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Abstract

A new method for predicting manoeuvre loads on a large transport aircraft with a swept-back wing and a load alleviation system based on control surface deflections is developed. For this purpose, three-dimensional Reynolds-averaged Navier–Stokes (RANS) simulations of the rigid wing–fuselage configuration are performed while the aerodynamics of the tailplane are estimated by means of handbook methods. For a closer analysis, different quasi-steady pitching manoeuvres are chosen based on the CS-25 regulations. One of these manoeuvres is also simulated with active load alleviation, leading to a reduction in the wing-root bending moment by more than 40%. Besides demonstrating the potential of the considered load alleviation system, it is shown which manoeuvres are especially critical in this context and which secondary effects come along with load alleviation.

Keywords

ManoeuvreLoadsLoad alleviationLoad controlCFDSimulationTransport aircraft
Type
Research Article
Information
The Aeronautical Journal , Volume 126 , Issue 1298 , April 2022 , pp. 681 - 709
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Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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Footnotes

†

This paper has been updated. A corresponding correction notice has been published, detailing the changes.

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