飞翼布局高低速一体化气动优化设计

doi:10.7527/S1000-6893.2023.29367

Abstract

Abstract:

The flying wing layout is the most promising aerodynamic layout for future aircraft because of its advantages in aerodynamics， stealth and structure. A large number of design analyses conducted in academia for flying wings reveal that the low-speed takeoff/landing performance and controllability are the main difficulties in the performance and safety of the flying wing layout. For the flying wing layout UAVs and combat aircraft， the low-speed performance and controllability are further deteriorated due to the influence of the stealthy design. Previous research has mainly focused on the design of high-speed cruising， while little research on low-speed design can be found. This paper examines the high and low speed integrated design of a flying wing layout UAV based on the high-performance discrete adjoint optimization design platform. First， the effects of different low-speed design models on the low-speed characteristics of the aircraft were compared. Then， a high and low integrated design model was established， comprehensively improving the high and low speed performance of the aircraft. Finally， the results were analyzed， and the main points and rules of the high and low-speed integrated design were summarized， providing a powerful and effective method for the aerodynamic design of the flying wing layout.

Key words: flying wing layout, discrete adjoint, aerodynamic optimization, low-speed design, flow separation

CLC Number:

V211

Ke ZHAO, Jun DENG, Jiangtao HUANG, Shusheng CHEN, Zhenghong GAO. Aerodynamic optimization design of high and low speed integration for flying wing layout[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(15): 129367.

Figures/Tables 31

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Model	C_L	C_D	C_Dp	C_m	K
Initial	0.25	0.018 35	0.013 75	-0.051 8	13.63
Opt_cruise	0.25	0.012 94	0.008 10	-0.051 8	19.32

Model	C_L	C_D	C_Dp	C_m	K
Initial	0.25	0.018 35	0.013 75	-0.051 8	13.63
Opt_cruise	0.25	0.012 94	0.008 10	-0.051 8	19.32
Opt_cruise+low	0.25	0.013 72	0.009 00	-0.045 1	18.21

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Aerodynamic optimization design of high and low speed integration for flying wing layout

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