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An unsteady aerodynamic model for three-dimensional wing based on augmented lifting-line method

Published online by Cambridge University Press:  25 April 2022

X. Li Open the ORCID record for X. Li [Opens in a new window] ,
Z. Zhou  and
J.H. Guo
X. Li*
Affiliation:
School of Aeronautics, Northwestern Polytechnical University, Xi’an, China
Z. Zhou
Affiliation:
School of Aeronautics, Northwestern Polytechnical University, Xi’an, China
J.H. Guo
Affiliation:
School of Aeronautics, Northwestern Polytechnical University, Xi’an, China
*
*Corresponding author. Email: lixu24@outlook.com
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Abstract

A fast numerical method for unsteady aerodynamic calculation of 3D wing is established, which is suitable for the preliminary design. Based on the lifting-line method, the aerodynamic data of the 2D aerofoil obtained by the unsteady CFD simulation is used as the model input to solve the aerodynamic force of the 3D wing. Compared with the traditional steady lifting-line method, the augmented method adopts the unsteady Kutta-Jouowski (K-J) theorem to calculate the circulation and improve the accuracy of the method through the circulation correction. The pitching motion of 3D wing at different aspect ratio and reduction frequencies are studied. The results show that the aerodynamic forces obtained by the augmented lifting-line method have good agreement with the 3D unsteady CFD calculations. Compared with 3D CFD calculation, the calculation efficiency of the improved method is increased by more than 12 times. The improved method has extensive applicability and can be used to estimate the unsteady aerodynamic forces of 3D single or multiple wing configurations.

Keywords

Lifting-line modelUnsteady aerodynamicsThree-dimensional effectUnsteady K-J theorem
Type
Research Article
Information
The Aeronautical Journal , Volume 127 , Issue 1307 , January 2023 , pp. 97 - 115
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Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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