Background-oriented schlieren technique with vector tomography for measurement of axisymmetric pressure fields of laser-induced underwater shock waves

被引:7
作者
Ichihara, Sayaka [1 ]
Shimazaki, Takaaki [1 ]
Tagawa, Yoshiyuki [1 ,2 ]
机构
[1] Tokyo Univ Agr & Technol, Dept Mech Syst Engn, 2-24-16 Naka Cho, Koganei, Tokyo 1848588, Japan
[2] Tokyo Univ Agr & Technol, Inst Global Innovat Res, 2-24-16 Naka Cho, Koganei, Tokyo 1848588, Japan
基金
日本学术振兴会; 日本科学技术振兴机构;
关键词
DENSITY-MEASUREMENTS; FEMORAL-HEAD; THERAPY; NECROSIS; RECONSTRUCTION; ALGORITHMS; JET;
D O I
10.1007/s00348-022-03524-4
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
This study aims to overcome the problems that existing background-oriented schlieren (BOS) techniques based on computed tomography (CT-BOS) face when measuring pressure fields of laser-induced underwater shock waves. To do this, it proposes a novel BOS technique based on vector tomography (VT-BOS) of an axisymmetric target. The remarkable feature of the proposed technique is the reconstruction of an axisymmetric vector field with nonzero divergence, such as the field of a laser-induced underwater shock wave. This approach is based on an approximate relation between the projection of the axisymmetric vector field and the reconstructed vector field. For comparison, the pressure fields of underwater shock waves are measured with VT-BOS, CT-BOS, and a needle hydrophone. It is found that VT-BOS is significantly better than CT-BOS in terms of better convergence, less dependence on the spatial resolution of the acquired images, and lower computational cost. The proposed technique can be applied not only to fluid dynamical fields, but also to other axisymmetric targets in other areas, such as electromagnetics and thermodynamics.
引用
收藏
页数:18
相关论文
共 68 条
[1]   Assessment of three-dimensional density measurements from tomographic background-oriented schlieren (BOS) [J].
Amjad, Shoaib ;
Karami, Shahram ;
Soria, Julio ;
Atkinson, Callum .
MEASUREMENT SCIENCE AND TECHNOLOGY, 2020, 31 (11)
[2]  
[Anonymous], 29 INT S SHOCK WAV
[3]   Time-resolved 3D Capture of Non-stationary Gas Flows [J].
Atcheson, Bradley ;
Ihrke, Ivo ;
Heidrich, Wolfgang ;
Tevs, Art ;
Bradley, Derek ;
Magnor, Marcus ;
Seidel, Hans-Peter .
ACM TRANSACTIONS ON GRAPHICS, 2008, 27 (05)
[4]   An evaluation of optical flow algorithms for background oriented schlieren imaging [J].
Atcheson, Bradley ;
Heidrich, Wolfgang ;
Ihrke, Ivo .
EXPERIMENTS IN FLUIDS, 2009, 46 (03) :467-476
[5]   LASER-INDUCED HIGH-PRESSURE SHOCK WAVES IN WATER [J].
BELL, CE ;
LANDT, JA .
APPLIED PHYSICS LETTERS, 1967, 10 (02) :46-&
[6]   Surface pressure measurements using luminescent coatings [J].
Bell, JH ;
Schairer, ET ;
Hand, LA ;
Mehta, RD .
ANNUAL REVIEW OF FLUID MECHANICS, 2001, 33 :155-206
[7]   High accuracy optical flow estimation based on a theory for warping [J].
Brox, T ;
Bruhn, A ;
Papenberg, N ;
Weickert, J .
COMPUTER VISION - ECCV 2004, PT 4, 2004, 2034 :25-36
[8]  
Brujan EA, 2011, CAVITATION IN NON-NEWTONIAN FLUIDS: WITH BIOMEDICAL AND BIOENGINEERING APPLICATIONS, P1, DOI 10.1007/978-3-642-15343-3
[9]   Bone Marrow Edema Syndrome of the Foot Treated with Extracorporeal Shock Wave Therapy: A Retrospective Case Series [J].
Cao, Jin ;
Zhang, Changgui ;
Huang, Heqin ;
Yang, Liu ;
Duan, Xiaojun .
JOURNAL OF FOOT & ANKLE SURGERY, 2021, 60 (03) :523-528
[10]   Tomographic reconstruction of a three-dimensional magnetization vector field [J].
Donnelly, Claire ;
Gliga, Sebastian ;
Scagnoli, Valerio ;
Holler, Mirko ;
Raabe, Jorg ;
Heyderman, Laura J. ;
Guizar-Sicairos, Manuel .
NEW JOURNAL OF PHYSICS, 2018, 20