Experiment and simulation on air layer drag reduction of high-speed underwater axisymmetric projectile

doi:10.1016/j.euromechflu.2015.01.002

IMECH-IR > 流固耦合系统力学重点实验室

	Experiment and simulation on air layer drag reduction of high-speed underwater axisymmetric projectile
	Yu XX(于娴娴); Wang YW(王一伟); Huang CG(黄晨光); Wei YP(魏延鹏); Fang X(方欣); Du TZ(杜特专); Wu XC(吴小翠); Wang, YW (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
发表期刊	EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
	2015-07
卷号	52 页码:45-54
ISSN	0997-7546
摘要	Injection of air could lead to creation of a bubbly mixture or air layer near the surface that can significantly adjust the flow within the turbulent boundary layer. In this paper, stress wave propagation techniques and Split Hopkinson Pressure Bar (SHPB) are used in underwater launching experiment. Simulation with volume of fluid (VOF) method and modified renormalization group (RNG) k-epsilon model is also performed to study the physical process of drag reduction of axisymmetric body. Comparison between numerical and experimental air layer length shows good correlation. Results indicate that air layer has good effect on drag reduction. Friction drag reduction mechanism is analyzed from two aspects due to different air volume fraction alpha. At area with high alpha, fluid is heterogeneous and layered. Drag reduction is from decrease of velocity gradient and dynamic viscosity at the wall. At area with small alpha, the mixture is homogeneous. Empirical equation of turbulent boundary layer shear stress is applied to describe drag reduction mechanism. The unsteady evolution of drag with injection of air is also studied at last. (C) 2015 Elsevier Masson SAS. All rights reserved.
关键词	Axisymmetric Projectile Air Layer Boundary Layer Drag Reduction
DOI	10.1016/j.euromechflu.2015.01.002
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000355367700006
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
项目资助者	National Natural Science Foundation of China [11332011, 11202215]
课题组名称	LMFS冲击与耦合效应(LHO)
论文分区	二类/Q2
引用统计	被引频次：23[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/311007/54981
专题	流固耦合系统力学重点实验室
通讯作者	Wang, YW (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Yu XX,Wang YW,Huang CG,et al. Experiment and simulation on air layer drag reduction of high-speed underwater axisymmetric projectile[J]. EUROPEAN JOURNAL OF MECHANICS B-FLUIDS,2015,52:45-54.
APA	Yu XX.,Wang YW.,Huang CG.,Wei YP.,Fang X.,...&Wang, YW .(2015).Experiment and simulation on air layer drag reduction of high-speed underwater axisymmetric projectile.EUROPEAN JOURNAL OF MECHANICS B-FLUIDS,52,45-54.
MLA	Yu XX,et al."Experiment and simulation on air layer drag reduction of high-speed underwater axisymmetric projectile".EUROPEAN JOURNAL OF MECHANICS B-FLUIDS 52(2015):45-54.

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