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uCRM: An Aerostructural Model for the Study of Flexible Transonic Aircraft Wings

TitleuCRM: An Aerostructural Model for the Study of Flexible Transonic Aircraft Wings
Publication TypeJournal Articles
Year of Publication2018
AuthorsBrooks, TR, Kenway, GKW, Martins, JRRA
JournalAIAA Journal

Since its introduction, the NASA Common Research Model (CRM) has proved a useful aero- dynamic benchmark for predicting CFD-based drag and aerodynamic design optimization. The model was originally conceived as a purely aerodynamic benchmark and, as such, the wing geometry corresponds to the deflected shape at its nominal 1 g flight condition. However, interest has been growing to extend this model to aeroelastic studies. Unfortunately, because of its predefined deflection, the model is not suitable for aeroe- lastic analysis and design. To address this issue, we define an undeflected CRM (uCRM) through an inverse design procedure that includes the outer mold line geometry of the undeflected wing and the corresponding internal wingbox structure. The original CRM wing has an aspect ratio of 9, so this model is referred to as “uCRM-9.” Additionally, because modern transport aircraft are trending toward higher-aspect-ratio wing designs, we develop a higher aspect ratio variant of this model to assess next-generation wing designs. This variant, called “uCRM-13.5,” has an aspect ratio of 13.5 and is designed by using buffet-constrained multi- point aerostructural optimization. The purpose of these models is to provide publicly available benchmarks for aeroelastic wing analysis and design optimization.



(In press)

Citation KeyBrooks2018a
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