Numerical investigation of aerodynamics and wake on biplane airfoils at high angles of attack

doi:10.1016/j.ijmecsci.2021.106606

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	Numerical investigation of aerodynamics and wake on biplane airfoils at high angles of attack
	R. Guo; Y. Bai; X. Pei and Z. Lai
	2021
发表期刊	International Journal of Mechanical Sciences
ISSN	207403
卷号	205
摘要	Biplane configuration is a critical configuration for aircrafts all the time, but the dynamics and flow mechanism remain elusive, with no systematic description forthcoming. This paper reported a numerical investigation of spacing effect (=d/c=0.45, c is the chord length and c=6inch) and the mean and fluctuating aerodynamics for biplane airfoils at angles of attack ranging from 30 to 90. Additionally, particular attention was devoted to vorticity fields and Strouhal number (St). The primary finding was that CL and CD of the lower airfoil were greater than those of the upper airfoil whatever was located to. And the turning points for CL and CD of the upper airfoil showed an evident regularity with increasing .But the maximum deviation first plungs then jumps with increasing . What inspired us was the fluctuating aerodynamics in =1.5 converged quickly which may contribute to enhancing stability. Interestingly, overall lift-to-drag ratio trends in all cases were strikingly similar to a single airfoil. Three vortices regimes were identified from the generation mechanism of traling-edge vortices (TEVs), named integrated vortices, transition with deformed vortices and coshedding vortices, respectively. And the vortices regime was also related to the angle of attack. Besides, in the integrated and coshedding vortices regimes, two Strouhal numbers of the lower airfoil and the upper airfoil were equivalent, but St can't be estimated which one is larger in the transition regime. 2021 Elsevier Ltd
DOI	10.1016/j.ijmecsci.2021.106606
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收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65471
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	R. Guo,Y. Bai,X. Pei and Z. Lai. Numerical investigation of aerodynamics and wake on biplane airfoils at high angles of attack[J]. International Journal of Mechanical Sciences,2021,205.
APA	R. Guo,Y. Bai,&X. Pei and Z. Lai.(2021).Numerical investigation of aerodynamics and wake on biplane airfoils at high angles of attack.International Journal of Mechanical Sciences,205.
MLA	R. Guo,et al."Numerical investigation of aerodynamics and wake on biplane airfoils at high angles of attack".International Journal of Mechanical Sciences 205(2021).

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