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2021 | OriginalPaper | Chapter

Effects of Transition on Aerodynamic Characteristics of Laminar Airfoil Based on CFD

Authors : Yanping Zhao, Lianghua Xiao, Yao Chen, Rui Chen

Published in: Proceedings of the International Conference on Aerospace System Science and Engineering 2020

Publisher: Springer Singapore

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Abstract

Laminar airfoil has extensive application prospect in the civil aviation area as its low drag characteristic. However, the laminar flow is too sensitive to be disturbed and then laminar-turbulent transition location will move forward, which results in a significant increase in drag. Therefore, it is meaningful to obtain the aerodynamic characteristics of laminar airfoil both under natural transition and disturbed transition conditions. This paper focuses on the aerodynamic characteristics of a laminar airfoil named NACA65(1)412. Firstly, numerical simulations of natural transition of the airfoil flow at various angles of attack were carried out using γ-Reθ model. Secondly, forced transition simulations were taken to imitate the disturbed airfoil flow using k-ω SST model. Results show that, the transition location has a great influence on the aerodynamic characteristics of laminar airfoil, especially on the drag. For the natural transition, as the angle of attack increasing, the natural transition location on the upper surface moves upstream while the one on the lower surface moves the opposite. The upper-surface transition location moves upstream rapidly after the 4° angle of attack. For the forced transition, the drag increases approximately linearly with the transition location for both the upper and lower surface, but the upper-surface behaves much more significant. The lift changes little with the movement of transition locations.

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Metadata
Title
Effects of Transition on Aerodynamic Characteristics of Laminar Airfoil Based on CFD
Authors
Yanping Zhao
Lianghua Xiao
Yao Chen
Rui Chen
Copyright Year
2021
Publisher
Springer Singapore
DOI
https://doi.org/10.1007/978-981-33-6060-0_35

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