講演・口頭発表等

国際共著 国際会議
2021年1月

Nonlinear Static and Dynamic Analysis Framework for Very Flexible Multibody Aircraft with Propellers

AIAA Scitech 2021 Forum
  • Keisuke Otsuka
  • ,
  • Alfonso del Carre
  • ,
  • Rafael Palacios

開催年月日
2021年1月11日 - 2021年1月21日
記述言語
英語
会議種別
口頭発表(一般)
主催者
AIAA
開催地
Online
国・地域
アメリカ合衆国

A nonlinear static and dynamic aeroelastic analysis framework for high aspect ratio wings with propellers is described. The aerodynamic effect of propellers is considered. The high computational cost required for modeling aerodynamic interaction between the wing and propeller wake is reduced by taking advantage of the relatively slow dynamics of the wing. Consequently, the propeller wake is modeled as a straight vortex cylinder that does not require a computationally expensive wake updating process. By leveraging the smallness of the propeller, we propose an averaged vortex cylinder method that calculates the induced velocities of the propeller vortex cylinder efficiently without suffering from a numerical singularity and loss of accuracy. The induced velocities are considered in the wing aerodynamic force calculation using an unsteady vortex lattice method. We also propose an efficient propeller cylinder coordinate generation method modeling the propeller-attached wing by absolute nodal coordinate formulation with a multibody dynamic theory. The developed framework is validated by comparison with other frameworks and formulations. A nonlinear static analysis on a representative high-aspect-ratio wing demonstrates that the propeller-induced axial velocity has a larger effect on the increase in deflection than the tangential velocity. The nonlinear dynamic results show that the propeller may decrease the deflection amplitude.

リンク情報
URL
https://arc.aiaa.org/doi/10.2514/6.2021-1391