Impact of a continuously extending wall on laminar-turbulent transition in subsonic boundary layers

doi:10.1063/5.0106736

IMECH-IR > 非线性力学国家重点实验室

	Impact of a continuously extending wall on laminar-turbulent transition in subsonic boundary layers
	Dong M(董明)1,2
通讯作者	Dong, Ming(dongming@imech.ac.cn)
发表期刊	PHYSICS OF FLUIDS
	2022-08-01
卷号	34 期号:8 页码:11
ISSN	1070-6631
摘要	Structural morphing is an efficient means to enable the design of aircrafts for diverse requirements, such as high endurance and high speed; however, there may be side effects on the aerodynamic performance, which needs to be considered before its implementation. In this paper, we particularly focus on the impact of a representative morphing structure, a continuously extending wall in the chordwise direction, on the laminar-turbulent transition in subsonic boundary layers. The large-Reynolds-number asymptotic approach is employed, and both the mean-flow distortion and the perturbation field are described by the triple-deck theory, which leads to a great reduction in the number of the controlling parameters and shows clearly their interaction mechanisms. Two relevant mechanisms, namely, the local receptivity and local scattering mechanisms, are considered, whose effects on the development of the boundary-layer instability modes, leading to a change in the transition onset eventually, are quantified systematically by solving numerically the high-dimensional linear equation system. The receptivity efficiency is greater near the lower-branch neutral frequency, while the scattering effect increases with the frequency monotonically. Both the receptivity and scattering calculations show good agreement with the linear predictions when the extending-wall speed is sufficiently low, but for a moderate extending speed, both the receptivity efficiency and the scattering efficiency increase superlinearly with the extending speed. Published under an exclusive license by AIP Publishing.
DOI	10.1063/5.0106736
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000841283000006
关键词[WOS]	TOLLMIEN-SCHLICHTING WAVES ; VORTICAL DISTURBANCES ; SCATTERING ; FLOW ; GENERATION
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
资助项目	National Key R&D Program of China ; NSFC ; Strategic Priority Research Program, CAS ; [2021YFA0719200] ; [U20B2003] ; [11988102] ; [91952202] ; [XDB22040104]
项目资助者	National Key R&D Program of China ; NSFC ; Strategic Priority Research Program, CAS
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	Dong, Ming
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/89929
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;; 2.Peking Univ, Sino Russian Math Ctr, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Dong M. Impact of a continuously extending wall on laminar-turbulent transition in subsonic boundary layers[J]. PHYSICS OF FLUIDS,2022,34,8,:11.
APA	董明.(2022).Impact of a continuously extending wall on laminar-turbulent transition in subsonic boundary layers.PHYSICS OF FLUIDS,34(8),11.
MLA	董明."Impact of a continuously extending wall on laminar-turbulent transition in subsonic boundary layers".PHYSICS OF FLUIDS 34.8(2022):11.

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