Estimation of sensible heat flux in an urban area with scintillometer
用闪烁计估算城市地区的感热通量
基本信息
- 批准号:12650601
- 负责人:
- 金额:$ 2.3万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2000
- 资助国家:日本
- 起止时间:2000 至 2001
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Scintillometer is newly developed instrument for measuring the sensible heat flux by detecting scintillation of twin polarized laser beams. Structure function of temperature is derived from fluctuation of beam strength, and energy dissipation rate is derived from correlation of twin beam.Sensible heat flux over beam path is estimated from these two parameters of turbulence assuming with the Monin-Obukhov Similarity with some empirical formulas. It has the advantage of measuring path averaged sensible heat flux easily, but prerequisite for measurement, especially in the case of urban area, has not been so clear yet. In this study, observations for verification of sensible heat flux by scintillometer were performed in various kinds of surface, for example river water surface running through built-up area, grassland surface in urban park, paddy field, vegetated stepwise roof-garden, and so on. With the comparison of flux by eddy correlation method, accuracy of scintillometer and some limits of measuring condition were clarified.In order to check the possibility of application of scintillometer to measure sensible heat flux from vertical building wall surface, the apparatus for path change by mirror refraction are also devised.The position of the mirror between transmitter and receiver is important. In the case of just after transmitter and just before receiver, there was no influence of mirror refraction on flux measurement. But V-shape path, that is mirror was located at the middle part of laser path, fluctuation of laser strength become rather unstable and could not measure in any incident angle.
闪烁仪是新开发的仪器,用于通过检测双偏光激光束的闪烁来测量明智的热通量。温度的结构函数是从梁强度的波动中得出的,并且能量耗散速率来自双子束的相关性。可靠的热通量是从这两个湍流参数中估算出的,假设Monin-Obukhov与某些经验公式相似。它具有轻松测量路径平均明智的热通量的优势,但是测量的先决条件,尤其是在城市地区,尚不清楚。在这项研究中,在各种表面上进行了对闪光灯计验证明智的热通量的观察,例如,河水表面贯穿了建筑区域,城市公园的草地,帕迪田,植被阶梯式屋顶园林等等。通过比较通过涡流相关方法对通量进行比较,闪光灯计的准确性和测量条件的某些限制被阐明了。为了检查闪光灯计应用于测量垂直建筑壁表面的明智的热通量的可能性,还设计了镜像折射的路径变化设备。发射器和接收者之间的镜像位置很重要。在发射器之后和接收器之前,镜像折射对通量测量没有影响。但是V形路径位于激光路径的中部,激光强度的波动变得不稳定,无法以任何入射角度测量。
项目成果
期刊论文数量(22)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
三坂育正: "ステップガーデンを有する建物周辺の温熱環境実測評価(その2)熱収支の解析結果"日本建築学会大会学術講演梗概集. D-1. 727-728 (2001)
御坂生政:“带台阶花园的建筑物周围热环境的实测评估(第2部分)热平衡分析结果”日本建筑学会会议学术讲座摘要D-1(2001)。
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三坂育正: "緑化による屋外熱環境の緩和に関する研究-その1-草地における熱収支特性の実測評価"日本建築学会大会学術講演梗概集. D-1. 615-616 (2000)
御坂生政:“通过绿化缓解室外热环境的研究 - 第 1 部分 - 草地热平衡特性的实际测量评估”日本建筑学会会议学术讲座摘要 D-1(2000 年)。
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Ikusei Misaka: "Field experiments of thermal environment around the building with stepping garden - Part 2 Results of heat balance analysis"Summaries of Technical Papers of Annual, Meeting AIJ. D-1. 727-728 (2001)
御坂郁生:“带阶梯花园的建筑物周围热环境的现场实验 - 第 2 部分热平衡分析结果”年度会议技术论文摘要,AIJ。
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寒林晃弘: "隅田川が周辺の温熱環境に及ぼす効果の実測(その2)水温の年変化と水面熱収支"日本建築学会大会学術講演梗概集. D-1. 1119-1120 (2000)
上林昭弘:《隅田川对周围热环境影响的实测(第二部分)水温和水面热平衡的年度变化》日本建筑学会会议学术讲座摘要D-1。 -1120 (2000)
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尾之上真弓: "ステップガーデンを有する建物とその周辺の熱環境に関する実測と研究(その2)熱収支の解析結果"日本建築学会大会学術講演梗概集. (印刷中). (2002)
小上麻由美:《带台阶花园的建筑物及其周围热环境的实测与研究(第2部分)热平衡分析结果》日本建筑学会会议学术讲座论文集(2002年出版)。 )
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NARITA Ken-ichi其他文献
NARITA Ken-ichi的其他文献
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{{ truncateString('NARITA Ken-ichi', 18)}}的其他基金
Developing design methods with water mist spray to create comfortable outdoor space
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26420588 - 财政年份:2014
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$ 2.3万 - 项目类别:
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Cold air drainage from slope-forests in a city and its availability as a countermeasure against the warming
城市斜坡森林冷空气排出及其对抗气候变暖的有效性
- 批准号:
23560700 - 财政年份:2011
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Wind tunnel experiment on area-averaged transfer coefficient of non-uniform block with a salinity change method
盐度变化法非均匀块体面积平均传递系数风洞试验
- 批准号:
18560580 - 财政年份:2006
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Wind tunnel experiments about transfer coefficient in urban surfaces and modeling of city structure.
城市表面传递系数风洞实验和城市结构建模。
- 批准号:
15560516 - 财政年份:2003
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$ 2.3万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Field observations on thermal effects of green space in an urban area.
城市地区绿地热效应的实地观测。
- 批准号:
06650656 - 财政年份:1994
- 资助金额:
$ 2.3万 - 项目类别:
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