Measurement of shock wave unsteadiness using a high-speed schlieren system and digital image processing

被引：36
作者：
Estruch, D. [1 ]
Lawson, N. J. [1 ]
MacManus, D. G. [1 ]
Garry, K. P. [1 ]
Stollery, J. L. [1 ]
机构：
[1] Cranfield Inst Technol, Dept Aerosp Sci, Cranfield MK43 0AL, Beds, England
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2008年 / 79卷 / 12期
关键词：
boundary layer turbulence; flow instability; flow separation; flow visualisation; high-speed optical techniques; image processing; optical information processing; schlieren systems; shock wave effects;
D O I：
10.1063/1.3053361
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A new method to measure shock wave unsteadiness is presented. Time-resolved visualizations of the flow field under investigation are obtained using a high-speed schlieren optical system and the motion of the shock wave is determined by means of digital image processing. Information on the shock's unsteadiness is subsequently derived with Fourier analysis. A sample study on shock unsteadiness in a shock-wave/turbulent boundary-layer interaction with separation is included. The method presented enables a measure of shock unsteadiness at locations in the imaged flow field not accessible by intrusive methods.
引用
收藏
页数：3
相关论文
共 13 条
  • [1] [Anonymous], SCHLIEREN SHADOWGRAP
  • [2] Ultra-fast-framing schlieren system for studies of the time evolution of jets in supersonic crossflows
    Ben-Yakar, A
    Hanson, RK
    [J]. EXPERIMENTS IN FLUIDS, 2002, 32 (06) : 652 - 666
  • [3] AN ELECTRONIC CRANZ-SCHARDIN CAMERA
    BRETTHAUER, B
    MEIER, GEA
    STASICKI, B
    [J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 1991, 62 (02) : 364 - 368
  • [4] A COMPUTATIONAL APPROACH TO EDGE-DETECTION
    CANNY, J
    [J]. IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, 1986, 8 (06) : 679 - 698
  • [5] On the Canny edge detector
    Ding, LJ
    Goshtasby, A
    [J]. PATTERN RECOGNITION, 2001, 34 (03) : 721 - 725
  • [6] DOLLING DS, 2001, P 31 AIAA FLUID DYN
  • [7] Space and time organisation of a shock wave/turbulent boundary layer interaction
    Dupont, P
    Haddad, C
    Ardissone, JP
    Debiève, JF
    [J]. AEROSPACE SCIENCE AND TECHNOLOGY, 2005, 9 (07) : 561 - 572
  • [8] Unsteadiness in shock wave boundary layer interactions with separation
    Dussauge, JP
    Dupont, P
    Debiève, JF
    [J]. AEROSPACE SCIENCE AND TECHNOLOGY, 2006, 10 (02) : 85 - 91
  • [9] Gonzalez Rafael C, 2004, Digital Image processing using MATLAB
  • [10] AN INEXPENSIVE LIGHT-SOURCE FOR HIGH-SPEED SCHLIEREN PHOTOGRAPHY
    HALEY, R
    SMY, PR
    [J]. JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS, 1988, 21 (12): : 1172 - 1174
12