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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.
Source PublicationEUROPEAN JOURNAL OF MECHANICS B-FLUIDS
2015-07
Volume52Pages:45-54
ISSN0997-7546
AbstractInjection 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.
KeywordAxisymmetric Projectile Air Layer Boundary Layer Drag Reduction
DOI10.1016/j.euromechflu.2015.01.002
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000355367700006
WOS Research AreaMechanics ; Physics
WOS SubjectMechanics ; Physics, Fluids & Plasmas
Funding OrganizationNational Natural Science Foundation of China [11332011, 11202215]
DepartmentLMFS冲击与耦合效应(LHO)
Classification二类/Q2
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/54981
Collection流固耦合系统力学重点实验室
Corresponding AuthorWang, YW (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
Recommended Citation
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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