Development of highly accurate dynamic 3D-PIV based on digital holography and its applications
| Project/Area Number |
17560148
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Kyoto Institute of Technology |
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Principal Investigator |
MURATA Shigeru Kyoto Institute of Technology, Graduate School of Science and Technology, Associate Professor, 工芸科学研究科, 助教授 (50174298)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2005: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | Flow measurements / Digital holography / Three-dimensional measurement / Spatio-temporal derivative method / Time series holograms / Single camera technique / Measurement accuracy / Unsteady flows |
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| Research Abstract |
In this research, a highly accurate dynamic PIV technique has been developed for measuring three velocity components in a three dimensional flow field with a single camera, and its performance and measurement accuracy have been evaluated by experiment and numerical simulation. The proposed method is based on digital holography with coherent illuminating light and a video camera. First, the optical system with a high-speed CMOS camera is set up to easily capture the motion of tracer particles with higher time-resolution and to measure three components of velocity in three dimensional space. Then the information of relative phase is employed for image reconstruction from an observed hologram pattern in order to distinguish tracer particles to each other at higher number density of particles. A new method is also proposed for measuring the velocity component in depth direction from the reconstructed volumes of light intensity at two sequential instants. The velocity component is evaluated by a spatio-temporal derivative method. Furthermore, the proposed method is applied to 3D orientation measurement of fibrous objects floating in fluid flows.
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Report
(3 results)
Research Products
(7 results)
