Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2023 , Vol. 57 >Issue 6: 747 - 756

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2021.380

Aeronautics and Astronautics

Influence of Aerodynamic Characteristics of Airfoil Forward Flight Considering Step-Type Ground

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  • 1. State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China
    2. Unmanned System Research Institute, Northwestern Polytechnical University, Xi’an 710072, China

Received date: 2021-09-26

  Revised date: 2021-11-23

  Accepted date: 2021-12-16

  Online published: 2022-11-25

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Abstract

The aerodynamic influence of ground effects during forward flight is difficult to ignore, especially when there is a sudden change in the ground structure. The aerodynamic performance of the airfoil during forward flight is investigated using the NACA4412 airfoil, the correlation between two factors, i.e., height and angle of attack, and the aerodynamic performance of the airfoil are analyzed. The results show that under the effect of step-type ground, the wing forward flight causes a steep drop in lift-to-drag ratio when the ground effect is absent, and there is a linear relationship with the height above the ground. The angle of attack from the ground has an inverse relationship with the sudden change in aerodynamic performance, i.e., the airfoil needs to maintain a large angle of attack when it leaves the ground in order to reduce the steep change in aerodynamic performance. The take-off and landing process of a shipboard aircraft is typical of a step-type ground. This paper provides a reference for the aerodynamic design of an airfoil under the influence of ground effects.

Key words： step-type ground; ground effect; pneumatic characteristics; forward flight

Cite this article

XU Xiaogang, ZHANG Yang, CHANG Min, CHEN Gang . Influence of Aerodynamic Characteristics of Airfoil Forward Flight Considering Step-Type Ground[J]. Journal of Shanghai Jiaotong University, 2023 , 57(6) : 747 -756 . DOI: 10.16183/j.cnki.jsjtu.2021.380

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