NASA-CRM LATERAL-DIRECTIONAL STABILITY DERIVATIVES COMPARISON BETWEEN SEMI-EMPIRICAL, VORTEX LATTICE AND PANEL METHOD

Abstract

© 2021 32nd Congress of the International Council of the Aeronautical Sciences, ICAS 2021. All rights reserved.Aiming to build a 6DOF flight simulation model for NASA-CRM and, in the lack of experimental lateral-directional data, three different methodologies were assessed and compared: usual semi-empirical method based on historical wind tunnel experiments and first principals physics, vortex lattice method (using XFLR5 software), and panel method (using OpenVSP software). The comparison presented is exhaustive in the aspect of isolating each component aerodynamic contribution and presents a clear view of the agreement between the studied methodologies. This work serves as basis for a first assessment of the uncertainty of the stability derivatives, associated with each methodology, usually used during preliminary design of aircraft.

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