Measurements of Velocity Uniformity in Watertunnel Using DPIV
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摘要: 用数字式粒子图像测速技术(DPIV)及特定预偏置技术校测水洞流场,并将测量结果与用传统流场校测方法测得的结果相比较,发现特定预偏置技术显著提高了流场测量精度,适用于流场校测.Abstract: A Digital Particle Image Velocimetry(DPIV)system using a special Pre-bias method was applied to flow field calibration measurements in the testing section of a water tunnel. Compared with the measurement results obtained by traditional methods (Pitot probe, LDV and traditional DPIV),the results show that the special Pre-bias method can improve measurement accuracy with almost one order level and is fit for flow field velocity uniformity measurement.
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Key words:
- water tunnels /
- flow field calibration tests /
- precision /
- DPIV /
- pre-bias method
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[1] 陈克成流体力学实验技术[M].北京:机械工出版社,1983. [2]Shen Gongxin. On PIV to face new century[J]. 流体力学实验与测量, 2002,14(2):1~15. [3]Adrian R J. Multi-point optical measurement of simultaneous vectors in unsteady flow—a review[J]. Int Journal of Heat and Fluid Flow, 1986,7:127~145. [4]Shen Gongxin. The useability and feasibility study of the velocity shifting techniques in PIV . In:Kobayyashi T, Yamamoto F, eds. 2nd Int Workshop on PIV-Fukui ’97 .Fukui Japan:The Visualization Society of Japan,1997.185~195. -
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