碩士 / 國立海洋大學 / 造船工程學系 / 86 / In this study, the alternating color image anemometry (ACIA)
method is proposed.Alternating color, multi-exposure particle
image was recorded by a three-chip color CCD camera. Knowing
that the red, blue, and green CCD chip of a 3-CCD camera has
different sensitivity to the color of scattering light, the
alternating color, multi-exposure particle image can be
separated into sequential images by performing appropriate band
processes. With sequential images available, the magnitude and
direction of the velocity vectors can be determined from the
digital correlation method. The ACIA method thus preserves the
merits of both PIV and DPIV methods by analyzing a multi-
exposure particle image using the digital correlation method of
sequential image. The proposed ACIA method was first calibrated
by measuring a constant speed-rotating disk, and then applied to
measure the turbulent wake behind a ship hull. Satisfactory
results were obtained.
| Identifer | oai:union.ndltd.org:TW/086NTOU1345013 |
| Date | January 1998 |
| Creators | ChangChien, Shing Ching, 張簡秀俊 |
| Contributors | Der-Yuan Liou, 趙勝裕 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 79 |
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