Development of the Opening that Promotes Cross-Ventilation and Research on the Evaluation of Cool-Breeze-Environment

促进交叉通风的开口开发及清风环境评价研究

基本信息

批准号：
14350312
负责人：
KAMATA Motoyasu
金额：
$ 8.06万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350312/
关键词：
Cross-Ventilation Local Dynamic Similarity Model Wind Tunnel Experiment Opening Dynamic Pressure Tangential to the Wall Total pressure Wind pressure Discharge Coefficient 局所相似モデル通風性能評価 CFD LES 流管解析乱流エネルギー数値計算全圧測定

项目摘要

The objective of this research was about the utilization of airflow for improving indoor conditions in hot and humid rooms. The phenomenon of Cross-ventilation was emphatically researched, and "the Local Dynamic Similarity Model" was presented. The main results of this research are as follows ;Verification of the Local Dynamic Similarity ModelIt was confirmed that changes of the inflow discharge coefficient and the inflow angle could be predicted by using Local Dynamic Similarity Model even when approach flow angle and the position of the opening were changed.Newly developed method for evaluating ventilation performance of openings by using Local Dynamic Similarity ModelAccording to the local dynamic similarity model, we have to reproduce only around the opening. In this method, evaluated opening is set up in parallel to the wind tunnel floor surface and influence by the blocking effect of the wind tunnel equipment is suppressed to the minimum. Therefore, the influence and the effect o … More f the cross-ventilation promotion by the condition around the opening can be evaluated.Ventilation performance database for various types of inflow openingsVarious types of openings were evaluated for ventilation performance by this method. An approximate expression of discharge coefficient as a function of dimensionless-cross-ventilation-driving-pressure was derived. From this expression, a database for ventilation performance was obtained. By using this database, it was confirmed that a highly accurate cross-ventilation flow rate was able to predicted compared with the past method. In addition, the consistency of this database was confirmed by the experiment using full-scale openings.Simplified method for estimating dynamic pressure tangential to openings of cross-ventilated buildingsDynamic pressure tangential to openings (Pt) is necessary when cross-ventilation flow rate is estimated according to the Local Dynamic Similarity Model. We produced simplified method for estimating Pt by using the surface wind sensor developed by Irwin (1981). This sensor is omnidirectional pressure sensor, and has been developed for measuring wind velocity within a horizontal plane at the level of pedestrians in a wind tunnel model. We applied this sensor to the wall-surface, and confirmed that it was possible to estimate Pt by using this sensor. Less

这项研究的目的是利用气流来改善炎热和潮湿房间的室内条件。横向通风的现象进行了强调研究，并提出了“局部动态相似性模型”。这项研究的主要结果如下：验证局部动态相似性模型的验证已证实，即使在更改了接近流动角度和开口的位置时，也可以使用局部动态相似性模型来预测流入排放系数的变化和流入角度的变化。仅通过使用局部动态相似性模型来评估开放率的频率相似模型，以置于局部动态模型。在这种方法中，评估的开口与风隧道地板表面并联设置，并通过风洞设备的阻塞效应抑制至最小值。因此，可以评估跨开口周围条件的影响和效果。通过这种方法评估了用于各种流入开口类型的开口的通风性能数据库，以进行通风性能。得出了排放系数的近似表达，该表达与无量纲 - 通风 - 驾驶压力的函数。从这个表达式中，获得了通风性能的数据库。通过使用此数据库，可以证实与过去的方法相比，高度准确的交叉通风流量能够预测。此外，该数据库的一致性通过实验使用全尺度开放确认。简化的方法，用于估算与开口的交叉通风建筑物压力切换到开口（PT）的开口时，当跨口感流量是根据局部动力学相似性模型估算的。我们通过使用Irwin（1981）开发的表面风传感器来估算PT的简单方法。该传感器是全向压力传感器，已开发用于测量风隧道模型中行人水平的水平面内的风速。我们将该传感器应用于壁表面，并确认可以使用该传感器估计PT。较少的