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http://dx.doi.org/10.3795/KSME-B.2010.34.3.309

Digital Particle Holographic System for Flow-Field Measurements  

Yan, Yang (Key Lab. of Automobile Parts and Test Technique, Chongqing Univ. of Tech.)
Kang, Bo-Seon (Dep. of Mechanical Engineering, Chonnam Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.34, no.3, 2010 , pp. 309-316 More about this Journal
Abstract
In this study, a digital particle holographic system and its application to channel-flow measurements were investigated. A double-exposure hologram recording system that is capable of recording digital holograms in a short time interval was developed. A correlation coefficient method was used to determine the focal plane of particles. The Wiener filter was used to remove noises and improve image quality. Two-threshold and image segmentation methods were used for binary image transformation. The cross-correlation method was used for particle pairing. The developed system was employed to study channel flow fields, and the axial velocities of channel flow were measured. The measurement errors are acceptable, and this proves the feasibility of using the digital particle holographic system as a good tool for flow-field measurements.
Keywords
Digital Particle Holography; Flow Fields; Correlation Coefficient Method;
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