Local Dynamic Similarity Model of Cross-Ventilation Part 1 - Theoretical Framework
Local Dynamic Similarity Model of Cross-Ventilation Part 1 - Theoretical Framework
复制标题
交叉通风的局部动态相似模型第 1 部分 - 理论框架
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Fumihiro Nakayama
中科院分区：
文献类型：
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作者：
T. Kurabuchi;M. Ohba;T. Endo;Y. Akamine;Fumihiro Nakayama
摘要提出了一种新的交叉通风入流口流量系数和气流角计算模型。该模型是基于入流口附近的交叉通风流动结构在开口处交叉通风驱动压力与动压力之比一致的情况下产生的动态相似性。通过风洞实验证实，该模型可以在任何风向和开口位置下应用。根据大涡模拟的结果估计了交叉通风流动的流管内压力变化，并将其作为模型制备的基础。研究发现，在这一阶段，流动的加速和湍流动能的产生消耗了开口处的静压。
Abstract A new model has been proposed for evaluating the discharge coefficient and flow angle at an inflow opening for cross-ventilation. This model is based on the fact that the cross-ventilation flow structure in the vicinity of an inflow opening creates dynamic similarity under the condition that the ratio of the cross-ventilation driving pressure to the dynamic pressure of cross flow at the opening is consistent. It was confirmed, from a wind tunnel experiment, that the proposed model can be applied regardless of wind direction and opening position. Change of pressure along the stream tube of a cross-ventilated flow was estimated from the results of Large Eddy Simulation, and was set as the basis of model preparation. It was found that the static pressure at the opening was exhausted by the flow‘s acceleration and by turbulent kinetic energy generation during this stage.