Experimental analysis of high-speed helium jet flow using four-dimensional digital speckle tomography

被引：0
作者：
Han Seo Ko
Koh Ikeda
Masaaki Ishikawa
Koji Okamoto
Yong-Jae Kim
机构：
[1] Sungkyunkwan University,School of Mechanical Engineering
[2] Ibaraki College of Technology,Department of Mechanical Engineering
[3] The University of Ryukyus,Department of Quantum Engineering and Systems Science
[4] University of Tokyo,undefined
来源：
Experiments in Fluids | 2006年 / 40卷
关键词：
Deflection Angle; Projection Angle; Algebraic Reconstruction Technique; Helium Density; Fringe Shift;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A high-speed and initial helium jet flow has been analyzed by a developed four-dimensional digital speckle tomography. Multiple high-speed cameras have been used to capture movements of speckles in multiple angles of view simultaneously because a shape of a nozzle for the jet flow is asymmetric and the initial jet flow is fast and unsteady. The speckle movements between no flow and helium jet flow from the asymmetric nozzle controlled by a solenoid valve have been obtained by a cross-correlation tracking method so that those distances can be transferred to deflection angles of laser rays for density gradients. The four-dimensional density fields for the high-speed helium jet flow have been reconstructed from the deflection angles by a developed real-time tomography method.
引用
收藏
页码：442 / 451
页数：9
相关论文
共 16 条
  • [1] Gordon R(1974)A tutorial on ART IEEE Trans Nuclear Sci NS-21 78-92
  • [2] Hanson KM(1985)Local basis function approach to computed tomography Appl Opt 24 4028-4039
  • [3] Wecksung GW(1993)Investigation of natural convection heat transfer in converging channel flows using a specklegram technique J Heat Transfer 115 140-148
  • [4] Kihm KD(1999)An extended algebraic reconstruction technique (ART) for density-gradient projections: laser speckle photographic tomography Exp Fluids 27 542-550
  • [5] Kim JH(2002)Comparison and analysis of tomography methods for reconstruction of three-dimensional density distributions in two-phase flows J Nondestruct Test 22 545-556
  • [6] Fletcher LS(2003)Tomographic reconstruction of two-phase flows KSME Int J 17 571-580
  • [7] Ko HS(1989)Optical tomography applied to a speckle photographic measurement of asymmetric flows with variable density Exp Fluids 7 157-163
  • [8] Kihm KD(1993)Limited-data computed tomography algorithms for the physical sciences Appl Opt 32 3736-3754
  • [9] Ko HS(undefined)undefined undefined undefined undefined-undefined
  • [10] Kim Y-J(undefined)undefined undefined undefined undefined-undefined
12