ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Characteristic analysis of large-scale wavelength protuberances wings near critical angle
Received date: 2024-04-19
Revised date: 2024-04-23
Accepted date: 2024-04-29
Online published: 2024-05-14
Supported by
National Natural Science Foundation of China(12172014)
In recent years， leading-edge serrations as a passive method for wing separation control have attracted significant attention in academia. This paper investigates the influence of two leading-edge tubercles with relatively large-scale wavelengths on the aerodynamics of a full-span wing near critical angles through numerical simulations. Compared to the baseline wing， the stalling process of the two improved wing shapes with larger-scale wavelengths is both slow and stable. By studying the surface flow characteristics through numerical simulations， we found that the wing with serrations having a wavelength of 1.5 times the chord length maintained a singular and regular flow pattern both before and after stalling， while the flow pattern of the wing with a wavelength equal to the chord length transitioned from a singular， regular flow to a more complex combination of multiple flow patterns as the angle increased. A mechanism is proposed to explain this transition in flow patterns， and two flow combination mechanisms are presented to explain the reasons for the different flow patterns.
Key words： airfoil; stall; leading-edge protuberances; flow control; flow pattern
Xiangying GUO , Jie XU , Yongchang HUANG . Characteristic analysis of large-scale wavelength protuberances wings near critical angle[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2024 , 45(S1) : 730557 -730557 . DOI: 10.7527/S1000-6893.2024.30557
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