| 关于三维长街谷空气交换能力的讨论 |
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| 引用本文： | 王友君,亢燕铭.关于三维长街谷空气交换能力的讨论[J].东华大学学报(自然科学版),2010,36(5). |
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| 作者姓名： | 王友君 亢燕铭 |
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| 作者单位： | 东华大学,环境科学与工程学院,上海,201620 |
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| 基金项目： | 国家973项目专题，国家自然科学基金资助项目 |
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| 摘 要： | 利用CFD(Computational Fluid Dynamics)技术模拟分析了来流风速、地面粗糙高度、建筑布局及缺口宽度对6种典型布局三维长街谷内外流场的影响,并引入整体换气次数nt和局部换气次数np的概念,评估了街谷的换气能力.研究结果表明:在自模区范围内nt与来流风速大小线性相关;粗糙高度对nt的影响是有限的;建筑布局能够明显改变街谷气流组织结构和换气能力,尤其是上风侧缺口的数量、宽度及缺口之间的相对位置.
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| 关 键 词： | 换气次数 建筑布局 缺口宽度 来流风速 粗糙高度 街谷 |
Discussion on Air Exchange Level of Three-Dimensional Long Street Canyons |
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| WANG You-jun,KANG Yan-ming.Discussion on Air Exchange Level of Three-Dimensional Long Street Canyons[J].Journal of Donghua University,2010,36(5). |
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| Authors: | WANG You-jun KANG Yan-ming |
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| Institution: | WANG You-jun,KANG Yan-ming(School of Environmental Science , Engineering,Donghua University,Shanghai 201620,China) |
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| Abstract: | Influence of ambient velocity magnitude, roughness height around street canyons, buildings layout and interspaces width on flow field in three dimensional long street canyons of six typical buildings layouts was simulated by CFD (computational fluid dynamics) technique. Total air exchange rate nt and partial air exchange rate np were introduced to evaluate air exchange level of three dimensional street canyons. Results showed that nt varied linearly with ambient wind velocity magnitude in self-simulation ar... |
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| Keywords: | air exchange rate buildings layout interspaces width ambient velocity roughness height street canyons |
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