| 摘要: |
| 在常规自相关粒子图像测速 (PIV)系统的基础上 ,发展了一个采用CCD像机的互相关粒子图像测速系统。用这一新系统测量了对抗流流场的结果表明 ,这一技术克服了自相关粒子图像测速技术在测量具有滞止点的流场中的困难。实验说明 ,与自相关粒子图像测速技术相比 ,这一技术更快捷有效 |
| 关键词: 粒子速度成像 对抗流 互相关 自相关 速度分布 流动测量 |
| DOI： |
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| CCD cross-correlation particle image velocimetry and its application to counterflow flowfield measurements |
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Zheng RiHeng,Bray K N C,Rogg B,Lecordier B
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1.Dept of Engineering,Univ of Cambridge,CB2 IPZ,U K;2.Inst für Thermo-Fluidynamik,Ruhr-Universit*]t,Bochum,D-44780,Germany;3.CORIA,Univ de Rouen,Mont-Saint-Aignan,France
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| Abstract: |
| t,Bochum,D-44780,Germany; 3 CORIA,Univ de Rouen,Mont-Saint-Aignan,France) Abstract:A cross-correlation Particle Image Velocimetry(PIV)system with a CCD camera was developed,based on a typical conventional auto-correlation Particle Image Velocimetry system The results obtained by using this PIV technique for the measurement of counterflow velocity field show that the difficulty arisen from the auto-correlation PIV for the measurements of velocity field including a stagnation point has been overcome with this approach In addition,compared with auto-correlation PIV,the experiments have demonstrated that this approach is more efficient |
| Key words: Particle image velocimetry Counterflow Cross-correlation Autocorrelation Velocity distribution Flow measurement? |
