| Project/Area Number |
18560580
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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 |
Architectural environment/equipment
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| Research Institution | Nippon Institute of Technology |
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Principal Investigator |
NARITA Ken-ichi Nippon Institute of Technology, Department of Architecture, Professor (20189210)
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| Co-Investigator(Kenkyū-buntansha) |
TANIMOTO Jun Kyushu University, Interdisciplinary Graduate School of Engineering Sciences, Professor (60227238)
HAGISHIMA Aya Kyushu University, Interdisciplinary Graduate School of Engineering Sciences, Associate Professor (60294980)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥2,940,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2006: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | Heat island / Transfer coefficient / Urban canopy / Heat budget / Convective heat transfer coefficient / Wind tunnel experiment / Sensible heat flux / turbulence / 対流熱伝達 / 都市キャノピィー |
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| Research Abstract |
We investigated bulk scalar coefficient of the street in the three-dimensional canopy with various conditions of arrangement, plan area density, frontal area index, and variability of model height in a wind tunnel using salinity method. The results can be summarized as follows.
(1) The relationships between bulk scalar coefficient and frontal area index of both staggered and normal arrayed canopy with uniform height shows different tendency. The bulk scalar coefficient of three-dimensional canopy of staggered and normal pattern have similar value under the sparse and dense conditions, in contrast, bulk scalar coefficient of staggered canopy is higher than that of normal canopy under the condition of frontal area index = 27.4%.
(2) The bulk scalar coefficient of uniform canopy is larger than that of canopy with height variation under the condition of plan area density < 17.4%. In Contrast, bulk scalar coefficient of uniform canopy is smaller than that of canopy with height variation under the condition of plan area density = 30.9%. Such a tendency is opposite to the result of drag force coefficient.
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