| Project/Area Number |
61490023
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
広領域
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| Research Institution | Kobe University |
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Principal Investigator |
TAKAMORI Toshi Professor, Faculty of Engineering, Kobe University, 工学部, 教授 (10031098)
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| Co-Investigator(Kenkyū-buntansha) |
YAMASAKI Yoshiharu Research Assistant, Faculty of Negineering, Kobe University, 工学部, 教務職員 (90174648)
TADOKORO Satoshi Research Associate, Faculty of Engineering, Kobe University, 工学部, 助手 (40171730)
KIMURA Ichiro Associate Professor, Faculty of Engineering, Kobe University, 工学部, 助教授 (60031134)
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| Project Period (FY) |
1986 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 1987: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1986: ¥3,900,000 (Direct Cost: ¥3,900,000)
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| Keywords | Color image processing / Flow visualization / Velocity vecotr distribution / Simultaneous measurement / Liquid crystal / 温度計測 / 感温液晶粒子懸濁法 / トレーサ粒子注入法 / 非定常流 / 相互相関法 / 圧力分布 / 乱れ強さ分布 |
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| Research Abstract |
The original purposes of this study were to improve the accuracy of flow velocity measurement and to obtain a potential field by Moire method and a velocity vector field by a tracer method at the same time by using color image information. On the latter purpose, however, it was turned out that the visualization method for measuring the above two quantities at the same time was technically difficult on investigation. Therefore, we directed our attention to a free convection in which the temperature and flow fields coexist. The two fields were visualized by using the liquid crystal tracer. From the visualized color images, simultaneous measurements of the velocity vector and temperature distributions were completed. Furthermore, the image processing instrumentation system of velocity vector distributions in three dimensional flow fields was developed.
Consequently, the following results were specifically confirmed. 1) The image processing instrumentation system of velocity vector distributions by using correlation method was established. It was proved that this system was very useful for even an unsteady flow field. And, the algorism for correcting erroneous velocity vectors was developed.
2) The velocity vector distributions in different water depths of a three dimensional flow were simultaneously obtained by the color separation of the image.
3) The changes of temperature and velocity vector distributions with time were obtained by applying the system to the dynamic behavior of a thermal stratification. In this color image processing instrumentation system, however, the spatial resolution of color measurement is still lower. Therefore, the problem remains that to be solved in the future is to develop an extensively used color separation algorism and study the strict relation between the temperature and the color.
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