Aerodynamic performance optimization design of middle wing section of a special laminar unmanned flight in high-speed cruise

TANG Songxiang; LI Jie; ZHANG Heng; NIU Xiaotian

doi:10.7527/S1000-6893.2022.26766

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2022 , Vol. 43 >Issue 11: 526766 - 526766

DOI: https://doi.org/10.7527/S1000-6893.2022.26766

Articles

Aerodynamic performance optimization design of middle wing section of a special laminar unmanned flight in high-speed cruise

TANG Songxiang ,
LI Jie ,
ZHANG Heng ,
NIU Xiaotian

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School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China

Received date: 2021-12-07

Revised date: 2021-12-11

Online published: 2022-11-28

Supported by

National Natural Science Foundation of China (11972304)

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Abstract

In this paper, the aerodynamic parameters of the middle wing of a special configuration laminar flow in high speed cruise are optimized. The lift and drag are optimized by means of airfoil modification of the middle wing section based on the γ-Re_θ transition model. Effects of the middle wing position on transition are researched to provide a basis for improving the cruising torque characteristics of the flight. The applicability of the calculation model is illustrated by comparing the calculation and wind tunnel test results of the original laminar flow airfoil and a traditional airfoil. The original laminar airfoil is modified to improve the lift coefficient at the same attack angle and reduce the cruise attack angle, so as to enlarge the laminar region and improve the laminar characteristics at the condition of high speed cruise. Finally, the aerodynamic calculations of different translation configurations of the middle wing section are conducted. The results show that the laminar region changes little along with the wing section translated. A comparison of the lift and drag coefficients of different translational configurations at the same attack angle shows little effect of configuration on lift and drag, which may provide some insights for torque optimization of the entire aircraft by translating the middle wing section in the future study.

Key words： middle wing section; γ-Re_θ transition model; aerodynamics; airfoil optimization; laminar flow characteristic

Cite this article

TANG Songxiang , LI Jie , ZHANG Heng , NIU Xiaotian . Aerodynamic performance optimization design of middle wing section of a special laminar unmanned flight in high-speed cruise[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022 , 43(11) : 526766 -526766 . DOI: 10.7527/S1000-6893.2022.26766

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